./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe018_rmo.opt.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/safe018_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe018_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:01:26,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:01:26,313 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:01:26,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:01:26,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:01:26,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:01:26,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:01:26,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:01:26,335 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:01:26,336 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:01:26,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:01:26,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:01:26,337 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:01:26,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:01:26,338 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:01:26,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:01:26,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:01:26,339 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:01:26,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:01:26,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:01:26,340 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:01:26,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:01:26,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:01:26,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:01:26,341 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:01:26,342 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:01:26,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:01:26,342 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:01:26,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:01:26,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:01:26,343 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:01:26,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:01:26,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:01:26,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:01:26,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:01:26,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:01:26,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:01:26,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:01:26,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:01:26,367 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:01:26,367 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:01:26,368 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:01:26,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:01:26,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 19:01:26,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:01:26,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:01:26,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:01:26,659 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:01:26,660 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:01:26,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i [2024-06-27 19:01:27,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:01:28,034 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:01:28,034 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i [2024-06-27 19:01:28,049 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60461f604/8b76b1158f324374b988807fb2eb29ae/FLAG0d6f4c303 [2024-06-27 19:01:28,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60461f604/8b76b1158f324374b988807fb2eb29ae [2024-06-27 19:01:28,064 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:01:28,068 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:01:28,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe018_rmo.opt.yml/witness.yml [2024-06-27 19:01:28,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:01:28,305 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:01:28,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:01:28,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:01:28,312 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:01:28,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:01:28" (1/2) ... [2024-06-27 19:01:28,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d29781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:01:28, skipping insertion in model container [2024-06-27 19:01:28,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:01:28" (1/2) ... [2024-06-27 19:01:28,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e84b2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:01:28, skipping insertion in model container [2024-06-27 19:01:28,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:01:28" (2/2) ... [2024-06-27 19:01:28,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d29781 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:01:28, skipping insertion in model container [2024-06-27 19:01:28,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:01:28" (2/2) ... [2024-06-27 19:01:28,320 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:01:28,456 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:01:28,458 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-27 19:01:28,458 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! 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))))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-27 19:01:28,458 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-27 19:01:28,459 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:01:28,459 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-27 19:01:28,506 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:01:28,682 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/safe018_rmo.opt.i[992,1005] [2024-06-27 19:01:28,845 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:01:28,854 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 19:01:28,892 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/safe018_rmo.opt.i[992,1005] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:01:29,036 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:01:29,091 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:01:29,092 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:01:29 WrapperNode [2024-06-27 19:01:29,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:01:29,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:01:29,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:01:29,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:01:29,100 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,135 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,181 INFO L138 Inliner]: procedures = 175, calls = 73, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-27 19:01:29,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:01:29,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:01:29,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:01:29,185 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:01:29,203 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,203 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,218 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,250 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [2, 33]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-27 19:01:29,253 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,253 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,266 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,277 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,291 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,293 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:01:29,300 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:01:29,300 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:01:29,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:01:29,307 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 07:01:29" (1/1) ... [2024-06-27 19:01:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:01:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:01:29,332 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 19:01:29,335 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 19:01:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 19:01:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 19:01:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 19:01:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 19:01:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:01:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:01:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:01:29,359 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:01:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:01:29,360 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:01:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:01:29,360 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:01:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:01:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 19:01:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:01:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:01:29,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:01:29,363 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 19:01:29,506 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:01:29,508 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:01:30,025 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:01:30,025 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:01:30,374 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:01:30,374 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:01:30,374 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:01:30 BoogieIcfgContainer [2024-06-27 19:01:30,374 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:01:30,378 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:01:30,378 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:01:30,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:01:30,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:01:28" (1/4) ... [2024-06-27 19:01:30,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1901fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:01:30, skipping insertion in model container [2024-06-27 19:01:30,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:01:28" (2/4) ... [2024-06-27 19:01:30,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1901fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:01:30, skipping insertion in model container [2024-06-27 19:01:30,383 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 07:01:29" (3/4) ... [2024-06-27 19:01:30,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1901fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:01:30, skipping insertion in model container [2024-06-27 19:01:30,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:01:30" (4/4) ... [2024-06-27 19:01:30,385 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_rmo.opt.i [2024-06-27 19:01:30,402 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:01:30,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:01:30,402 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:01:30,474 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:01:30,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 19:01:30,545 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 19:01:30,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:01:30,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 19:01:30,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 19:01:30,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 19:01:30,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:01:30,577 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;@30bed4de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:01:30,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 19:01:30,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:01:30,583 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 19:01:30,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:01:30,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:30,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:01:30,585 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 19:01:30,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash 679457327, now seen corresponding path program 1 times [2024-06-27 19:01:30,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:30,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336519357] [2024-06-27 19:01:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:30,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:32,780 INFO 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 19:01:32,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336519357] [2024-06-27 19:01:32,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336519357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:32,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:32,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:01:32,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147929867] [2024-06-27 19:01:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:01:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:01:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:01:32,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:01:32,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 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 19:01:32,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:32,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:01:32,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:33,809 INFO L124 PetriNetUnfolderBase]: 2613/4056 cut-off events. [2024-06-27 19:01:33,809 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-06-27 19:01:33,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 4056 events. 2613/4056 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22920 event pairs, 1279 based on Foata normal form. 0/3912 useless extension candidates. Maximal degree in co-relation 7907. Up to 3767 conditions per place. [2024-06-27 19:01:33,837 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 19:01:33,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 231 flow [2024-06-27 19:01:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:01:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:01:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-27 19:01:33,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 19:01:33,850 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 89 transitions. [2024-06-27 19:01:33,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 231 flow [2024-06-27 19:01:33,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:33,856 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 123 flow [2024-06-27 19:01:33,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 19:01:33,861 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 19:01:33,861 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 123 flow [2024-06-27 19:01:33,861 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 19:01:33,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:33,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:33,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:01:33,862 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 19:01:33,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:33,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1866183804, now seen corresponding path program 1 times [2024-06-27 19:01:33,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:33,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038684826] [2024-06-27 19:01:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:33,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:37,537 INFO 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 19:01:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038684826] [2024-06-27 19:01:37,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038684826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:37,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:37,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:01:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828415027] [2024-06-27 19:01:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:01:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:01:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:01:37,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:37,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 19:01:37,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:37,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:37,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:38,786 INFO L124 PetriNetUnfolderBase]: 3329/5126 cut-off events. [2024-06-27 19:01:38,787 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-06-27 19:01:38,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11190 conditions, 5126 events. 3329/5126 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28381 event pairs, 1115 based on Foata normal form. 6/5125 useless extension candidates. Maximal degree in co-relation 11178. Up to 4693 conditions per place. [2024-06-27 19:01:38,814 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 56 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-27 19:01:38,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 315 flow [2024-06-27 19:01:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:01:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:01:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-27 19:01:38,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-06-27 19:01:38,817 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 123 flow. Second operand 4 states and 111 transitions. [2024-06-27 19:01:38,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 315 flow [2024-06-27 19:01:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:01:38,820 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 156 flow [2024-06-27 19:01:38,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 19:01:38,821 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-06-27 19:01:38,822 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 156 flow [2024-06-27 19:01:38,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 19:01:38,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:38,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:38,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:01:38,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:38,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1013324703, now seen corresponding path program 1 times [2024-06-27 19:01:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:38,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336477997] [2024-06-27 19:01:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:40,518 INFO 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 19:01:40,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336477997] [2024-06-27 19:01:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336477997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:40,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:40,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:01:40,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50428021] [2024-06-27 19:01:40,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:40,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:01:40,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:01:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:01:40,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:40,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 156 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 19:01:40,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:40,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:40,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:41,889 INFO L124 PetriNetUnfolderBase]: 2594/4038 cut-off events. [2024-06-27 19:01:41,889 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2024-06-27 19:01:41,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 4038 events. 2594/4038 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22792 event pairs, 1049 based on Foata normal form. 4/4039 useless extension candidates. Maximal degree in co-relation 9505. Up to 3727 conditions per place. [2024-06-27 19:01:41,913 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 60 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 19:01:41,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 384 flow [2024-06-27 19:01:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:01:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:01:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:01:41,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:01:41,916 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 156 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:01:41,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 384 flow [2024-06-27 19:01:41,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 360 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:01:41,919 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 216 flow [2024-06-27 19:01:41,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-27 19:01:41,920 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-06-27 19:01:41,921 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 216 flow [2024-06-27 19:01:41,921 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 19:01:41,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:41,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:41,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:01:41,922 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 19:01:41,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1152493218, now seen corresponding path program 1 times [2024-06-27 19:01:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780990887] [2024-06-27 19:01:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:45,208 INFO 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 19:01:45,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:45,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780990887] [2024-06-27 19:01:45,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780990887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:45,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:45,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649403448] [2024-06-27 19:01:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:45,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:45,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:45,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 216 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 19:01:45,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:45,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:45,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:46,529 INFO L124 PetriNetUnfolderBase]: 2586/4026 cut-off events. [2024-06-27 19:01:46,529 INFO L125 PetriNetUnfolderBase]: For 2895/2895 co-relation queries the response was YES. [2024-06-27 19:01:46,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10405 conditions, 4026 events. 2586/4026 cut-off events. For 2895/2895 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22727 event pairs, 1000 based on Foata normal form. 4/4027 useless extension candidates. Maximal degree in co-relation 10387. Up to 3677 conditions per place. [2024-06-27 19:01:46,559 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 70 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-06-27 19:01:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 90 transitions, 476 flow [2024-06-27 19:01:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:01:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:01:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:01:46,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:01:46,564 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 216 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:01:46,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 90 transitions, 476 flow [2024-06-27 19:01:46,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 466 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 19:01:46,570 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 266 flow [2024-06-27 19:01:46,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-27 19:01:46,571 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-06-27 19:01:46,572 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 266 flow [2024-06-27 19:01:46,572 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 19:01:46,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:46,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:01:46,573 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 19:01:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash -460528721, now seen corresponding path program 1 times [2024-06-27 19:01:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446801780] [2024-06-27 19:01:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:49,336 INFO 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 19:01:49,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446801780] [2024-06-27 19:01:49,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446801780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:49,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:49,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868028640] [2024-06-27 19:01:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:49,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:49,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:01:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 266 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 19:01:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:49,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:01:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:50,671 INFO L124 PetriNetUnfolderBase]: 3345/5166 cut-off events. [2024-06-27 19:01:50,671 INFO L125 PetriNetUnfolderBase]: For 5633/5633 co-relation queries the response was YES. [2024-06-27 19:01:50,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14019 conditions, 5166 events. 3345/5166 cut-off events. For 5633/5633 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28686 event pairs, 1076 based on Foata normal form. 4/5163 useless extension candidates. Maximal degree in co-relation 13998. Up to 4633 conditions per place. [2024-06-27 19:01:50,692 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 63 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-27 19:01:50,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 510 flow [2024-06-27 19:01:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:01:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:01:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:01:50,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:01:50,694 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 266 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:01:50,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 510 flow [2024-06-27 19:01:50,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 474 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:50,701 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 314 flow [2024-06-27 19:01:50,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 19:01:50,702 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-06-27 19:01:50,702 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 314 flow [2024-06-27 19:01:50,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 19:01:50,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:50,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:50,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:01:50,703 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 19:01:50,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:50,704 INFO L85 PathProgramCache]: Analyzing trace with hash -460408751, now seen corresponding path program 2 times [2024-06-27 19:01:50,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:50,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307809183] [2024-06-27 19:01:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:50,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:53,119 INFO 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 19:01:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:53,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307809183] [2024-06-27 19:01:53,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307809183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:53,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:53,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243920173] [2024-06-27 19:01:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:53,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:01:53,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 314 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 19:01:53,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:53,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:01:53,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:54,583 INFO L124 PetriNetUnfolderBase]: 3335/5152 cut-off events. [2024-06-27 19:01:54,584 INFO L125 PetriNetUnfolderBase]: For 8082/8082 co-relation queries the response was YES. [2024-06-27 19:01:54,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14965 conditions, 5152 events. 3335/5152 cut-off events. For 8082/8082 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28671 event pairs, 1076 based on Foata normal form. 4/5149 useless extension candidates. Maximal degree in co-relation 14943. Up to 4571 conditions per place. [2024-06-27 19:01:54,619 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 73 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-27 19:01:54,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 616 flow [2024-06-27 19:01:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:01:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:01:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:01:54,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:01:54,621 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 314 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:01:54,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 616 flow [2024-06-27 19:01:54,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 100 transitions, 562 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:54,633 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 355 flow [2024-06-27 19:01:54,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-27 19:01:54,634 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-06-27 19:01:54,635 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 355 flow [2024-06-27 19:01:54,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 19:01:54,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:54,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:54,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:01:54,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:54,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:54,636 INFO L85 PathProgramCache]: Analyzing trace with hash 483825220, now seen corresponding path program 1 times [2024-06-27 19:01:54,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:54,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148011695] [2024-06-27 19:01:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:56,990 INFO 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 19:01:56,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148011695] [2024-06-27 19:01:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148011695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:56,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:56,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:01:56,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879419084] [2024-06-27 19:01:56,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:56,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:01:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:01:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:01:57,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:57,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 355 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 19:01:57,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:57,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:57,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:58,022 INFO L124 PetriNetUnfolderBase]: 2622/4075 cut-off events. [2024-06-27 19:01:58,023 INFO L125 PetriNetUnfolderBase]: For 7700/7700 co-relation queries the response was YES. [2024-06-27 19:01:58,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12459 conditions, 4075 events. 2622/4075 cut-off events. For 7700/7700 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 23010 event pairs, 1048 based on Foata normal form. 2/4071 useless extension candidates. Maximal degree in co-relation 12436. Up to 3732 conditions per place. [2024-06-27 19:01:58,045 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 74 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-06-27 19:01:58,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 639 flow [2024-06-27 19:01:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:01:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:01:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 19:01:58,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130434782608696 [2024-06-27 19:01:58,048 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 355 flow. Second operand 5 states and 118 transitions. [2024-06-27 19:01:58,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 639 flow [2024-06-27 19:01:58,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 580 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:58,056 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 389 flow [2024-06-27 19:01:58,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2024-06-27 19:01:58,058 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2024-06-27 19:01:58,058 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 389 flow [2024-06-27 19:01:58,058 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 19:01:58,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:58,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:01:58,059 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 19:01:58,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1144163308, now seen corresponding path program 1 times [2024-06-27 19:01:58,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:58,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337800080] [2024-06-27 19:01:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:00,315 INFO 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 19:02:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337800080] [2024-06-27 19:02:00,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337800080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:00,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:00,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:00,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438912547] [2024-06-27 19:02:00,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:00,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:00,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:00,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:00,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 389 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 19:02:00,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:00,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:00,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:02,096 INFO L124 PetriNetUnfolderBase]: 3700/5734 cut-off events. [2024-06-27 19:02:02,096 INFO L125 PetriNetUnfolderBase]: For 14061/14061 co-relation queries the response was YES. [2024-06-27 19:02:02,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18356 conditions, 5734 events. 3700/5734 cut-off events. For 14061/14061 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32440 event pairs, 613 based on Foata normal form. 16/5743 useless extension candidates. Maximal degree in co-relation 18331. Up to 4543 conditions per place. [2024-06-27 19:02:02,126 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 97 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-27 19:02:02,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 130 transitions, 847 flow [2024-06-27 19:02:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:02:02,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2024-06-27 19:02:02,128 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 389 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:02:02,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 130 transitions, 847 flow [2024-06-27 19:02:02,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 130 transitions, 833 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:02:02,142 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 492 flow [2024-06-27 19:02:02,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=492, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 19:02:02,145 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2024-06-27 19:02:02,145 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 492 flow [2024-06-27 19:02:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 19:02:02,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:02,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:02,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:02:02,146 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 19:02:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1309720846, now seen corresponding path program 2 times [2024-06-27 19:02:02,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895930652] [2024-06-27 19:02:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:05,312 INFO 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 19:02:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:05,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895930652] [2024-06-27 19:02:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895930652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:05,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376965738] [2024-06-27 19:02:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:05,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:05,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 19:02:05,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:05,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:05,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:06,657 INFO L124 PetriNetUnfolderBase]: 3664/5678 cut-off events. [2024-06-27 19:02:06,657 INFO L125 PetriNetUnfolderBase]: For 16671/16671 co-relation queries the response was YES. [2024-06-27 19:02:06,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18857 conditions, 5678 events. 3664/5678 cut-off events. For 16671/16671 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32040 event pairs, 912 based on Foata normal form. 20/5691 useless extension candidates. Maximal degree in co-relation 18829. Up to 4779 conditions per place. [2024-06-27 19:02:06,687 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 87 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-27 19:02:06,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 810 flow [2024-06-27 19:02:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:02:06,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-27 19:02:06,690 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 492 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:02:06,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 810 flow [2024-06-27 19:02:06,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 774 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:06,711 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 512 flow [2024-06-27 19:02:06,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=512, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-27 19:02:06,713 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-06-27 19:02:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 512 flow [2024-06-27 19:02:06,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 19:02:06,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:06,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:06,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:02:06,714 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 19:02:06,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash -71139792, now seen corresponding path program 3 times [2024-06-27 19:02:06,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796297106] [2024-06-27 19:02:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:09,774 INFO 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 19:02:09,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796297106] [2024-06-27 19:02:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796297106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:09,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:09,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759633116] [2024-06-27 19:02:09,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:09,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:09,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:09,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:09,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:09,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 512 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 19:02:09,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:09,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:09,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:11,474 INFO L124 PetriNetUnfolderBase]: 3754/5820 cut-off events. [2024-06-27 19:02:11,474 INFO L125 PetriNetUnfolderBase]: For 18049/18049 co-relation queries the response was YES. [2024-06-27 19:02:11,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19676 conditions, 5820 events. 3754/5820 cut-off events. For 18049/18049 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33077 event pairs, 1105 based on Foata normal form. 20/5833 useless extension candidates. Maximal degree in co-relation 19646. Up to 4969 conditions per place. [2024-06-27 19:02:11,508 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 97 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2024-06-27 19:02:11,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 126 transitions, 902 flow [2024-06-27 19:02:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:02:11,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-27 19:02:11,511 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 512 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:02:11,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 126 transitions, 902 flow [2024-06-27 19:02:11,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 126 transitions, 850 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:11,538 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 548 flow [2024-06-27 19:02:11,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=548, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-27 19:02:11,539 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-27 19:02:11,539 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 548 flow [2024-06-27 19:02:11,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 19:02:11,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:11,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:11,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:02:11,540 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 19:02:11,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash -70955342, now seen corresponding path program 1 times [2024-06-27 19:02:11,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597773454] [2024-06-27 19:02:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:15,197 INFO 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 19:02:15,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597773454] [2024-06-27 19:02:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597773454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:15,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656552812] [2024-06-27 19:02:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:15,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:15,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 548 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:02:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:15,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:16,879 INFO L124 PetriNetUnfolderBase]: 3734/5788 cut-off events. [2024-06-27 19:02:16,879 INFO L125 PetriNetUnfolderBase]: For 19656/19656 co-relation queries the response was YES. [2024-06-27 19:02:16,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19780 conditions, 5788 events. 3734/5788 cut-off events. For 19656/19656 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32827 event pairs, 930 based on Foata normal form. 12/5793 useless extension candidates. Maximal degree in co-relation 19749. Up to 4447 conditions per place. [2024-06-27 19:02:16,908 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 95 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-27 19:02:16,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 946 flow [2024-06-27 19:02:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:02:16,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531055900621118 [2024-06-27 19:02:16,911 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 548 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:02:16,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 946 flow [2024-06-27 19:02:16,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 890 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:16,945 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 575 flow [2024-06-27 19:02:16,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=575, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-27 19:02:16,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2024-06-27 19:02:16,946 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 575 flow [2024-06-27 19:02:16,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:02:16,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:16,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:16,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:02:16,947 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:16,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2142855134, now seen corresponding path program 1 times [2024-06-27 19:02:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:16,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540210369] [2024-06-27 19:02:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:19,582 INFO 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 19:02:19,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540210369] [2024-06-27 19:02:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540210369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:19,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:19,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:02:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052398888] [2024-06-27 19:02:19,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:02:19,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:02:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:02:19,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:19,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 575 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:19,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:19,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:19,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:20,928 INFO L124 PetriNetUnfolderBase]: 3728/5781 cut-off events. [2024-06-27 19:02:20,929 INFO L125 PetriNetUnfolderBase]: For 20999/20999 co-relation queries the response was YES. [2024-06-27 19:02:20,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19973 conditions, 5781 events. 3728/5781 cut-off events. For 20999/20999 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 32817 event pairs, 1247 based on Foata normal form. 2/5781 useless extension candidates. Maximal degree in co-relation 19941. Up to 5368 conditions per place. [2024-06-27 19:02:20,965 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 100 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2024-06-27 19:02:20,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 981 flow [2024-06-27 19:02:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 19:02:20,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-06-27 19:02:20,967 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 575 flow. Second operand 6 states and 132 transitions. [2024-06-27 19:02:20,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 981 flow [2024-06-27 19:02:21,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 119 transitions, 902 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:21,007 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 635 flow [2024-06-27 19:02:21,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-27 19:02:21,007 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2024-06-27 19:02:21,008 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 635 flow [2024-06-27 19:02:21,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:21,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:21,008 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 19:02:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:02:21,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:21,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1094858819, now seen corresponding path program 1 times [2024-06-27 19:02:21,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:21,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504892629] [2024-06-27 19:02:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:23,341 INFO 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 19:02:23,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:23,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504892629] [2024-06-27 19:02:23,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504892629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:23,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:23,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:02:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234572222] [2024-06-27 19:02:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:02:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:02:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:02:23,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:23,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 635 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 19:02:23,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:23,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:24,886 INFO L124 PetriNetUnfolderBase]: 3554/5612 cut-off events. [2024-06-27 19:02:24,886 INFO L125 PetriNetUnfolderBase]: For 21400/21400 co-relation queries the response was YES. [2024-06-27 19:02:24,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19861 conditions, 5612 events. 3554/5612 cut-off events. For 21400/21400 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 32312 event pairs, 1118 based on Foata normal form. 4/5611 useless extension candidates. Maximal degree in co-relation 19826. Up to 4956 conditions per place. [2024-06-27 19:02:24,916 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 105 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2024-06-27 19:02:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 137 transitions, 1134 flow [2024-06-27 19:02:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:02:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-06-27 19:02:24,918 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 635 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:02:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 137 transitions, 1134 flow [2024-06-27 19:02:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 1128 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 19:02:24,946 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 803 flow [2024-06-27 19:02:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=803, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-27 19:02:24,947 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2024-06-27 19:02:24,947 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 803 flow [2024-06-27 19:02:24,947 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 19:02:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:24,947 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 19:02:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:02:24,948 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:24,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1964680667, now seen corresponding path program 2 times [2024-06-27 19:02:24,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:24,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663768365] [2024-06-27 19:02:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:27,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:27,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663768365] [2024-06-27 19:02:27,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663768365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:27,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:27,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:02:27,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890950593] [2024-06-27 19:02:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:27,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:02:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:02:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:02:27,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:27,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 803 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 19:02:27,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:27,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:27,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:28,673 INFO L124 PetriNetUnfolderBase]: 3609/5700 cut-off events. [2024-06-27 19:02:28,674 INFO L125 PetriNetUnfolderBase]: For 25407/25407 co-relation queries the response was YES. [2024-06-27 19:02:28,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21534 conditions, 5700 events. 3609/5700 cut-off events. For 25407/25407 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33017 event pairs, 1248 based on Foata normal form. 6/5698 useless extension candidates. Maximal degree in co-relation 21494. Up to 5124 conditions per place. [2024-06-27 19:02:28,702 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 97 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-27 19:02:28,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1207 flow [2024-06-27 19:02:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:02:28,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-27 19:02:28,705 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 803 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:02:28,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1207 flow [2024-06-27 19:02:28,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1189 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 19:02:28,742 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 936 flow [2024-06-27 19:02:28,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=936, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-06-27 19:02:28,743 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2024-06-27 19:02:28,743 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 936 flow [2024-06-27 19:02:28,744 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 19:02:28,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:28,744 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 19:02:28,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:02:28,744 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 19:02:28,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1089757565, now seen corresponding path program 1 times [2024-06-27 19:02:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:28,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252194680] [2024-06-27 19:02:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:28,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:31,271 INFO 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 19:02:31,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:31,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252194680] [2024-06-27 19:02:31,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252194680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:31,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:31,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:31,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073682124] [2024-06-27 19:02:31,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:31,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:31,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:31,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:31,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:31,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:31,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:31,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:31,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:32,974 INFO L124 PetriNetUnfolderBase]: 3966/6132 cut-off events. [2024-06-27 19:02:32,974 INFO L125 PetriNetUnfolderBase]: For 30716/30716 co-relation queries the response was YES. [2024-06-27 19:02:32,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24025 conditions, 6132 events. 3966/6132 cut-off events. For 30716/30716 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 35048 event pairs, 1262 based on Foata normal form. 4/6129 useless extension candidates. Maximal degree in co-relation 23982. Up to 5506 conditions per place. [2024-06-27 19:02:33,003 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 107 selfloop transitions, 28 changer transitions 0/141 dead transitions. [2024-06-27 19:02:33,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 1345 flow [2024-06-27 19:02:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:02:33,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:02:33,006 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 936 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:02:33,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 1345 flow [2024-06-27 19:02:33,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 1259 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:33,054 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 949 flow [2024-06-27 19:02:33,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=949, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-27 19:02:33,055 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-06-27 19:02:33,055 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 949 flow [2024-06-27 19:02:33,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:33,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:33,055 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 19:02:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:02:33,056 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:33,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash -271302101, now seen corresponding path program 2 times [2024-06-27 19:02:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:33,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990386755] [2024-06-27 19:02:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:33,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990386755] [2024-06-27 19:02:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990386755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:35,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:35,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968073887] [2024-06-27 19:02:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:35,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:35,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:35,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:35,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 949 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:35,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:35,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:35,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:37,296 INFO L124 PetriNetUnfolderBase]: 3954/6110 cut-off events. [2024-06-27 19:02:37,296 INFO L125 PetriNetUnfolderBase]: For 33052/33052 co-relation queries the response was YES. [2024-06-27 19:02:37,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24606 conditions, 6110 events. 3954/6110 cut-off events. For 33052/33052 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34831 event pairs, 1258 based on Foata normal form. 4/6107 useless extension candidates. Maximal degree in co-relation 24562. Up to 5414 conditions per place. [2024-06-27 19:02:37,335 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 116 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-27 19:02:37,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 1428 flow [2024-06-27 19:02:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:02:37,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2024-06-27 19:02:37,338 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 949 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:02:37,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 1428 flow [2024-06-27 19:02:37,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 1351 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:37,398 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 978 flow [2024-06-27 19:02:37,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=978, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-06-27 19:02:37,398 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2024-06-27 19:02:37,399 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 978 flow [2024-06-27 19:02:37,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:37,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:37,399 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 19:02:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:02:37,399 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:37,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -419113139, now seen corresponding path program 1 times [2024-06-27 19:02:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:37,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981858346] [2024-06-27 19:02:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:37,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:39,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:39,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981858346] [2024-06-27 19:02:39,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981858346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:39,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:39,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:39,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678512916] [2024-06-27 19:02:39,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:39,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:39,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:39,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 978 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:39,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:39,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:39,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:41,479 INFO L124 PetriNetUnfolderBase]: 4046/6225 cut-off events. [2024-06-27 19:02:41,480 INFO L125 PetriNetUnfolderBase]: For 34710/34710 co-relation queries the response was YES. [2024-06-27 19:02:41,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25268 conditions, 6225 events. 4046/6225 cut-off events. For 34710/34710 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 35252 event pairs, 1205 based on Foata normal form. 4/6227 useless extension candidates. Maximal degree in co-relation 25223. Up to 5500 conditions per place. [2024-06-27 19:02:41,515 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 149 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-27 19:02:41,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 179 transitions, 1668 flow [2024-06-27 19:02:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:02:41,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515527950310559 [2024-06-27 19:02:41,517 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 978 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:02:41,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 179 transitions, 1668 flow [2024-06-27 19:02:41,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 179 transitions, 1600 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:41,559 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1111 flow [2024-06-27 19:02:41,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1111, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-27 19:02:41,560 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-06-27 19:02:41,560 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1111 flow [2024-06-27 19:02:41,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:41,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:41,561 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 19:02:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:02:41,561 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:41,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash -775349303, now seen corresponding path program 2 times [2024-06-27 19:02:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:41,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880845597] [2024-06-27 19:02:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880845597] [2024-06-27 19:02:44,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880845597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:44,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:44,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489524468] [2024-06-27 19:02:44,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:44,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:44,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:44,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:44,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1111 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:44,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:44,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:44,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:45,772 INFO L124 PetriNetUnfolderBase]: 4158/6409 cut-off events. [2024-06-27 19:02:45,772 INFO L125 PetriNetUnfolderBase]: For 38156/38156 co-relation queries the response was YES. [2024-06-27 19:02:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26944 conditions, 6409 events. 4158/6409 cut-off events. For 38156/38156 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 36475 event pairs, 1244 based on Foata normal form. 4/6411 useless extension candidates. Maximal degree in co-relation 26896. Up to 5770 conditions per place. [2024-06-27 19:02:45,806 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 161 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-06-27 19:02:45,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 192 transitions, 1783 flow [2024-06-27 19:02:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 19:02:45,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-06-27 19:02:45,808 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1111 flow. Second operand 9 states and 198 transitions. [2024-06-27 19:02:45,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 192 transitions, 1783 flow [2024-06-27 19:02:45,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 192 transitions, 1743 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:45,850 INFO L231 Difference]: Finished difference. Result has 111 places, 138 transitions, 1268 flow [2024-06-27 19:02:45,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1268, PETRI_PLACES=111, PETRI_TRANSITIONS=138} [2024-06-27 19:02:45,850 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 61 predicate places. [2024-06-27 19:02:45,850 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 138 transitions, 1268 flow [2024-06-27 19:02:45,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:45,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:45,851 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 19:02:45,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:02:45,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:45,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -271503539, now seen corresponding path program 3 times [2024-06-27 19:02:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:45,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168285536] [2024-06-27 19:02:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:45,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:48,321 INFO 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 19:02:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168285536] [2024-06-27 19:02:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168285536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:48,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:48,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277549969] [2024-06-27 19:02:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:48,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:48,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:48,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 138 transitions, 1268 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:48,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:48,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:49,770 INFO L124 PetriNetUnfolderBase]: 4146/6397 cut-off events. [2024-06-27 19:02:49,770 INFO L125 PetriNetUnfolderBase]: For 42052/42052 co-relation queries the response was YES. [2024-06-27 19:02:49,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27249 conditions, 6397 events. 4146/6397 cut-off events. For 42052/42052 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36390 event pairs, 1246 based on Foata normal form. 4/6399 useless extension candidates. Maximal degree in co-relation 27198. Up to 5762 conditions per place. [2024-06-27 19:02:49,806 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 147 selfloop transitions, 24 changer transitions 0/177 dead transitions. [2024-06-27 19:02:49,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 177 transitions, 1720 flow [2024-06-27 19:02:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 19:02:49,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906832298136646 [2024-06-27 19:02:49,808 INFO L175 Difference]: Start difference. First operand has 111 places, 138 transitions, 1268 flow. Second operand 7 states and 158 transitions. [2024-06-27 19:02:49,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 177 transitions, 1720 flow [2024-06-27 19:02:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 1639 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:49,874 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1242 flow [2024-06-27 19:02:49,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1242, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-27 19:02:49,874 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 19:02:49,875 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1242 flow [2024-06-27 19:02:49,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 19:02:49,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:49,875 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 19:02:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:02:49,875 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:49,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash -271288213, now seen corresponding path program 1 times [2024-06-27 19:02:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:49,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012029969] [2024-06-27 19:02:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:53,275 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 19:02:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012029969] [2024-06-27 19:02:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012029969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:53,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:53,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243697771] [2024-06-27 19:02:53,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:53,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:02:53,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1242 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:02:53,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:53,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:02:53,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:54,955 INFO L124 PetriNetUnfolderBase]: 4141/6402 cut-off events. [2024-06-27 19:02:54,955 INFO L125 PetriNetUnfolderBase]: For 42778/42778 co-relation queries the response was YES. [2024-06-27 19:02:54,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27361 conditions, 6402 events. 4141/6402 cut-off events. For 42778/42778 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 36569 event pairs, 1266 based on Foata normal form. 2/6402 useless extension candidates. Maximal degree in co-relation 27308. Up to 5897 conditions per place. [2024-06-27 19:02:54,997 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 157 selfloop transitions, 15 changer transitions 0/178 dead transitions. [2024-06-27 19:02:54,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 178 transitions, 1754 flow [2024-06-27 19:02:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 19:02:54,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720496894409938 [2024-06-27 19:02:54,998 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1242 flow. Second operand 7 states and 152 transitions. [2024-06-27 19:02:54,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 178 transitions, 1754 flow [2024-06-27 19:02:55,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 178 transitions, 1704 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:55,074 INFO L231 Difference]: Finished difference. Result has 115 places, 140 transitions, 1247 flow [2024-06-27 19:02:55,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1247, PETRI_PLACES=115, PETRI_TRANSITIONS=140} [2024-06-27 19:02:55,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-06-27 19:02:55,075 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 140 transitions, 1247 flow [2024-06-27 19:02:55,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:02:55,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:55,076 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 19:02:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:02:55,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:55,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2143089454, now seen corresponding path program 1 times [2024-06-27 19:02:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138881365] [2024-06-27 19:02:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:58,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:58,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138881365] [2024-06-27 19:02:58,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138881365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:58,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:58,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:58,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341425387] [2024-06-27 19:02:58,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:58,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:58,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:58,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 140 transitions, 1247 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 19:02:58,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:58,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:58,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:59,791 INFO L124 PetriNetUnfolderBase]: 3973/6165 cut-off events. [2024-06-27 19:02:59,791 INFO L125 PetriNetUnfolderBase]: For 45571/45579 co-relation queries the response was YES. [2024-06-27 19:02:59,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26600 conditions, 6165 events. 3973/6165 cut-off events. For 45571/45579 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35189 event pairs, 1015 based on Foata normal form. 4/6148 useless extension candidates. Maximal degree in co-relation 26546. Up to 5137 conditions per place. [2024-06-27 19:02:59,836 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 142 selfloop transitions, 36 changer transitions 0/195 dead transitions. [2024-06-27 19:02:59,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 1899 flow [2024-06-27 19:02:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:02:59,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-27 19:02:59,838 INFO L175 Difference]: Start difference. First operand has 115 places, 140 transitions, 1247 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:02:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 1899 flow [2024-06-27 19:02:59,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 195 transitions, 1864 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:59,993 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1359 flow [2024-06-27 19:02:59,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-27 19:02:59,994 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-06-27 19:02:59,994 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1359 flow [2024-06-27 19:02:59,994 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 19:02:59,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:59,994 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 19:02:59,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:02:59,994 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:59,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2140347814, now seen corresponding path program 2 times [2024-06-27 19:02:59,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:59,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134224071] [2024-06-27 19:02:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:03,559 INFO 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 19:03:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134224071] [2024-06-27 19:03:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134224071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:03,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:03,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:03,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192198673] [2024-06-27 19:03:03,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:03,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:03,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:03,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1359 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 19:03:03,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:03,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:03,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:05,230 INFO L124 PetriNetUnfolderBase]: 4037/6293 cut-off events. [2024-06-27 19:03:05,231 INFO L125 PetriNetUnfolderBase]: For 50477/50485 co-relation queries the response was YES. [2024-06-27 19:03:05,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27998 conditions, 6293 events. 4037/6293 cut-off events. For 50477/50485 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 36339 event pairs, 1137 based on Foata normal form. 4/6276 useless extension candidates. Maximal degree in co-relation 27942. Up to 5423 conditions per place. [2024-06-27 19:03:05,280 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 139 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-27 19:03:05,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 191 transitions, 1901 flow [2024-06-27 19:03:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:03:05,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124223602484472 [2024-06-27 19:03:05,282 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1359 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:03:05,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 191 transitions, 1901 flow [2024-06-27 19:03:05,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 191 transitions, 1847 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:03:05,366 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1405 flow [2024-06-27 19:03:05,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1405, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2024-06-27 19:03:05,367 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 72 predicate places. [2024-06-27 19:03:05,367 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1405 flow [2024-06-27 19:03:05,367 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 19:03:05,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:05,367 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 19:03:05,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:03:05,368 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:05,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1727543204, now seen corresponding path program 3 times [2024-06-27 19:03:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426966615] [2024-06-27 19:03:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:08,734 INFO 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 19:03:08,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426966615] [2024-06-27 19:03:08,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426966615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:08,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:08,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267319093] [2024-06-27 19:03:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:08,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:08,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:08,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:08,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1405 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 19:03:08,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:08,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:08,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:10,330 INFO L124 PetriNetUnfolderBase]: 4205/6572 cut-off events. [2024-06-27 19:03:10,330 INFO L125 PetriNetUnfolderBase]: For 55290/55302 co-relation queries the response was YES. [2024-06-27 19:03:10,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29382 conditions, 6572 events. 4205/6572 cut-off events. For 55290/55302 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 38566 event pairs, 1308 based on Foata normal form. 18/6566 useless extension candidates. Maximal degree in co-relation 29324. Up to 5599 conditions per place. [2024-06-27 19:03:10,381 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 138 selfloop transitions, 36 changer transitions 0/191 dead transitions. [2024-06-27 19:03:10,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 1947 flow [2024-06-27 19:03:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:03:10,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124223602484472 [2024-06-27 19:03:10,382 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1405 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:03:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 1947 flow [2024-06-27 19:03:10,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1873 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:10,473 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1477 flow [2024-06-27 19:03:10,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1477, PETRI_PLACES=124, PETRI_TRANSITIONS=151} [2024-06-27 19:03:10,473 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 74 predicate places. [2024-06-27 19:03:10,473 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1477 flow [2024-06-27 19:03:10,474 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 19:03:10,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:10,474 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 19:03:10,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:03:10,474 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 19:03:10,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash 785925617, now seen corresponding path program 1 times [2024-06-27 19:03:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:10,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679117474] [2024-06-27 19:03:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:10,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:12,856 INFO 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 19:03:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679117474] [2024-06-27 19:03:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679117474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:12,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:12,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921253847] [2024-06-27 19:03:12,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:12,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:12,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:12,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 151 transitions, 1477 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:12,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:12,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:12,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:14,363 INFO L124 PetriNetUnfolderBase]: 4511/6897 cut-off events. [2024-06-27 19:03:14,363 INFO L125 PetriNetUnfolderBase]: For 58445/58445 co-relation queries the response was YES. [2024-06-27 19:03:14,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31621 conditions, 6897 events. 4511/6897 cut-off events. For 58445/58445 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 39501 event pairs, 1076 based on Foata normal form. 2/6892 useless extension candidates. Maximal degree in co-relation 31562. Up to 6250 conditions per place. [2024-06-27 19:03:14,420 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 162 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-06-27 19:03:14,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 192 transitions, 2117 flow [2024-06-27 19:03:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:03:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:03:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:03:14,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-27 19:03:14,422 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1477 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:03:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 192 transitions, 2117 flow [2024-06-27 19:03:14,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 192 transitions, 2031 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:14,521 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1535 flow [2024-06-27 19:03:14,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1535, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2024-06-27 19:03:14,522 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-27 19:03:14,522 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1535 flow [2024-06-27 19:03:14,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:14,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:14,522 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 19:03:14,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:03:14,523 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:14,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1294745195, now seen corresponding path program 2 times [2024-06-27 19:03:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:14,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43589694] [2024-06-27 19:03:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:14,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:18,192 INFO 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 19:03:18,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43589694] [2024-06-27 19:03:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43589694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:18,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:18,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:18,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580805621] [2024-06-27 19:03:18,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:18,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:18,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:18,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1535 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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 19:03:18,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:18,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:18,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:19,704 INFO L124 PetriNetUnfolderBase]: 4506/6976 cut-off events. [2024-06-27 19:03:19,705 INFO L125 PetriNetUnfolderBase]: For 59928/59928 co-relation queries the response was YES. [2024-06-27 19:03:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31701 conditions, 6976 events. 4506/6976 cut-off events. For 59928/59928 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 40829 event pairs, 1374 based on Foata normal form. 2/6971 useless extension candidates. Maximal degree in co-relation 31640. Up to 6346 conditions per place. [2024-06-27 19:03:19,761 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 157 selfloop transitions, 24 changer transitions 0/187 dead transitions. [2024-06-27 19:03:19,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 2034 flow [2024-06-27 19:03:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:03:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:03:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 19:03:19,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-06-27 19:03:19,763 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1535 flow. Second operand 6 states and 135 transitions. [2024-06-27 19:03:19,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 2034 flow [2024-06-27 19:03:19,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1974 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 19:03:19,901 INFO L231 Difference]: Finished difference. Result has 130 places, 157 transitions, 1547 flow [2024-06-27 19:03:19,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1547, PETRI_PLACES=130, PETRI_TRANSITIONS=157} [2024-06-27 19:03:19,902 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 80 predicate places. [2024-06-27 19:03:19,902 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 157 transitions, 1547 flow [2024-06-27 19:03:19,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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 19:03:19,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:19,903 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 19:03:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:03:19,903 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:19,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1472179683, now seen corresponding path program 1 times [2024-06-27 19:03:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:19,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198717455] [2024-06-27 19:03:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:19,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:22,772 INFO 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 19:03:22,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198717455] [2024-06-27 19:03:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198717455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:22,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548148250] [2024-06-27 19:03:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:22,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:22,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:22,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:22,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 157 transitions, 1547 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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 19:03:22,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:22,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:22,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:24,671 INFO L124 PetriNetUnfolderBase]: 4572/6992 cut-off events. [2024-06-27 19:03:24,671 INFO L125 PetriNetUnfolderBase]: For 63127/63127 co-relation queries the response was YES. [2024-06-27 19:03:24,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32277 conditions, 6992 events. 4572/6992 cut-off events. For 63127/63127 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40208 event pairs, 1118 based on Foata normal form. 2/6987 useless extension candidates. Maximal degree in co-relation 32214. Up to 6052 conditions per place. [2024-06-27 19:03:24,746 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 142 selfloop transitions, 51 changer transitions 0/199 dead transitions. [2024-06-27 19:03:24,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 199 transitions, 2172 flow [2024-06-27 19:03:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:03:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:03:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:03:24,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-06-27 19:03:24,748 INFO L175 Difference]: Start difference. First operand has 130 places, 157 transitions, 1547 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:03:24,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 199 transitions, 2172 flow [2024-06-27 19:03:24,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 199 transitions, 2127 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:03:24,902 INFO L231 Difference]: Finished difference. Result has 133 places, 164 transitions, 1773 flow [2024-06-27 19:03:24,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1773, PETRI_PLACES=133, PETRI_TRANSITIONS=164} [2024-06-27 19:03:24,903 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-06-27 19:03:24,903 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 164 transitions, 1773 flow [2024-06-27 19:03:24,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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 19:03:24,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:24,904 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 19:03:24,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:03:24,904 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:24,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:24,905 INFO L85 PathProgramCache]: Analyzing trace with hash -407290795, now seen corresponding path program 2 times [2024-06-27 19:03:24,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:24,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621624801] [2024-06-27 19:03:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:24,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:27,846 INFO 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 19:03:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621624801] [2024-06-27 19:03:27,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621624801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:27,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:27,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:27,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19008498] [2024-06-27 19:03:27,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:27,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:27,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:27,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 164 transitions, 1773 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:27,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:29,745 INFO L124 PetriNetUnfolderBase]: 4618/7014 cut-off events. [2024-06-27 19:03:29,745 INFO L125 PetriNetUnfolderBase]: For 71788/71788 co-relation queries the response was YES. [2024-06-27 19:03:29,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34144 conditions, 7014 events. 4618/7014 cut-off events. For 71788/71788 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40149 event pairs, 1122 based on Foata normal form. 2/7009 useless extension candidates. Maximal degree in co-relation 34079. Up to 5957 conditions per place. [2024-06-27 19:03:29,802 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 159 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-06-27 19:03:29,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 220 transitions, 2580 flow [2024-06-27 19:03:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:03:29,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-27 19:03:29,803 INFO L175 Difference]: Start difference. First operand has 133 places, 164 transitions, 1773 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:03:29,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 220 transitions, 2580 flow [2024-06-27 19:03:29,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 220 transitions, 2499 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 19:03:29,973 INFO L231 Difference]: Finished difference. Result has 138 places, 171 transitions, 1954 flow [2024-06-27 19:03:29,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1954, PETRI_PLACES=138, PETRI_TRANSITIONS=171} [2024-06-27 19:03:29,973 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-27 19:03:29,973 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 171 transitions, 1954 flow [2024-06-27 19:03:29,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:29,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:29,974 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 19:03:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:03:29,974 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:29,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash -407022025, now seen corresponding path program 3 times [2024-06-27 19:03:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:29,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180943850] [2024-06-27 19:03:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:32,857 INFO 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 19:03:32,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:32,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180943850] [2024-06-27 19:03:32,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180943850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:32,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654486701] [2024-06-27 19:03:32,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:32,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:32,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 171 transitions, 1954 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:34,842 INFO L124 PetriNetUnfolderBase]: 4664/7148 cut-off events. [2024-06-27 19:03:34,842 INFO L125 PetriNetUnfolderBase]: For 77206/77206 co-relation queries the response was YES. [2024-06-27 19:03:34,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35804 conditions, 7148 events. 4664/7148 cut-off events. For 77206/77206 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 41532 event pairs, 1139 based on Foata normal form. 2/7143 useless extension candidates. Maximal degree in co-relation 35737. Up to 5997 conditions per place. [2024-06-27 19:03:34,895 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 152 selfloop transitions, 61 changer transitions 0/219 dead transitions. [2024-06-27 19:03:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 219 transitions, 2682 flow [2024-06-27 19:03:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:03:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2024-06-27 19:03:34,897 INFO L175 Difference]: Start difference. First operand has 138 places, 171 transitions, 1954 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:03:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 219 transitions, 2682 flow [2024-06-27 19:03:35,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 219 transitions, 2518 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:03:35,044 INFO L231 Difference]: Finished difference. Result has 141 places, 174 transitions, 1975 flow [2024-06-27 19:03:35,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1975, PETRI_PLACES=141, PETRI_TRANSITIONS=174} [2024-06-27 19:03:35,045 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-06-27 19:03:35,045 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 174 transitions, 1975 flow [2024-06-27 19:03:35,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:35,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:35,045 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 19:03:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:03:35,046 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 19:03:35,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1988019488, now seen corresponding path program 1 times [2024-06-27 19:03:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283450338] [2024-06-27 19:03:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:37,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283450338] [2024-06-27 19:03:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283450338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:37,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:37,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:37,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58034256] [2024-06-27 19:03:37,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:37,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:37,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:37,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:37,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 174 transitions, 1975 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:37,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:37,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:37,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:40,033 INFO L124 PetriNetUnfolderBase]: 4860/7451 cut-off events. [2024-06-27 19:03:40,034 INFO L125 PetriNetUnfolderBase]: For 77601/77607 co-relation queries the response was YES. [2024-06-27 19:03:40,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 7451 events. 4860/7451 cut-off events. For 77601/77607 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 43400 event pairs, 1153 based on Foata normal form. 8/7455 useless extension candidates. Maximal degree in co-relation 36268. Up to 6128 conditions per place. [2024-06-27 19:03:40,092 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 184 selfloop transitions, 57 changer transitions 0/247 dead transitions. [2024-06-27 19:03:40,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 247 transitions, 2864 flow [2024-06-27 19:03:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:03:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:03:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:03:40,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096618357487923 [2024-06-27 19:03:40,093 INFO L175 Difference]: Start difference. First operand has 141 places, 174 transitions, 1975 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:03:40,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 247 transitions, 2864 flow [2024-06-27 19:03:40,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 247 transitions, 2779 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:03:40,238 INFO L231 Difference]: Finished difference. Result has 148 places, 184 transitions, 2142 flow [2024-06-27 19:03:40,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=148, PETRI_TRANSITIONS=184} [2024-06-27 19:03:40,239 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-06-27 19:03:40,239 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 184 transitions, 2142 flow [2024-06-27 19:03:40,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:40,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:40,240 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 19:03:40,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:03:40,240 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:40,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash -763257848, now seen corresponding path program 2 times [2024-06-27 19:03:40,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:40,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804818683] [2024-06-27 19:03:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:42,946 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 19:03:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804818683] [2024-06-27 19:03:42,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804818683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:42,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:42,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:42,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498783018] [2024-06-27 19:03:42,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:42,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:42,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:42,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 184 transitions, 2142 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:42,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:42,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:42,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:45,173 INFO L124 PetriNetUnfolderBase]: 5298/8059 cut-off events. [2024-06-27 19:03:45,173 INFO L125 PetriNetUnfolderBase]: For 93839/93839 co-relation queries the response was YES. [2024-06-27 19:03:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41300 conditions, 8059 events. 5298/8059 cut-off events. For 93839/93839 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46752 event pairs, 1374 based on Foata normal form. 8/8060 useless extension candidates. Maximal degree in co-relation 41229. Up to 6806 conditions per place. [2024-06-27 19:03:45,244 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 187 selfloop transitions, 63 changer transitions 0/256 dead transitions. [2024-06-27 19:03:45,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 256 transitions, 3138 flow [2024-06-27 19:03:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:03:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:03:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:03:45,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-27 19:03:45,246 INFO L175 Difference]: Start difference. First operand has 148 places, 184 transitions, 2142 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:03:45,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 256 transitions, 3138 flow [2024-06-27 19:03:45,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 256 transitions, 3036 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:45,442 INFO L231 Difference]: Finished difference. Result has 154 places, 202 transitions, 2511 flow [2024-06-27 19:03:45,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2511, PETRI_PLACES=154, PETRI_TRANSITIONS=202} [2024-06-27 19:03:45,442 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-06-27 19:03:45,443 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 202 transitions, 2511 flow [2024-06-27 19:03:45,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:45,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:45,443 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 19:03:45,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:03:45,443 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 19:03:45,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash -403302614, now seen corresponding path program 3 times [2024-06-27 19:03:45,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:45,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648456452] [2024-06-27 19:03:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:47,966 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 19:03:47,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648456452] [2024-06-27 19:03:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648456452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:47,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274856032] [2024-06-27 19:03:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:47,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:47,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:47,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:47,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 202 transitions, 2511 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:47,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:47,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:47,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:50,220 INFO L124 PetriNetUnfolderBase]: 5274/8027 cut-off events. [2024-06-27 19:03:50,220 INFO L125 PetriNetUnfolderBase]: For 100082/100082 co-relation queries the response was YES. [2024-06-27 19:03:50,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42723 conditions, 8027 events. 5274/8027 cut-off events. For 100082/100082 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46621 event pairs, 1370 based on Foata normal form. 8/8028 useless extension candidates. Maximal degree in co-relation 42649. Up to 6790 conditions per place. [2024-06-27 19:03:50,294 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 179 selfloop transitions, 63 changer transitions 0/248 dead transitions. [2024-06-27 19:03:50,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 248 transitions, 3156 flow [2024-06-27 19:03:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:03:50,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081521739130435 [2024-06-27 19:03:50,296 INFO L175 Difference]: Start difference. First operand has 154 places, 202 transitions, 2511 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:03:50,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 248 transitions, 3156 flow [2024-06-27 19:03:50,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 248 transitions, 2985 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 19:03:50,588 INFO L231 Difference]: Finished difference. Result has 158 places, 202 transitions, 2482 flow [2024-06-27 19:03:50,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2482, PETRI_PLACES=158, PETRI_TRANSITIONS=202} [2024-06-27 19:03:50,589 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-06-27 19:03:50,589 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 202 transitions, 2482 flow [2024-06-27 19:03:50,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:50,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:50,589 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 19:03:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:03:50,590 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 19:03:50,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash -403302955, now seen corresponding path program 4 times [2024-06-27 19:03:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628113579] [2024-06-27 19:03:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:53,427 INFO 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 19:03:53,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628113579] [2024-06-27 19:03:53,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628113579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:53,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:53,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:53,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556403558] [2024-06-27 19:03:53,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:53,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:53,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:53,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:53,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:53,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 202 transitions, 2482 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:53,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:53,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:53,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:55,480 INFO L124 PetriNetUnfolderBase]: 5278/8018 cut-off events. [2024-06-27 19:03:55,480 INFO L125 PetriNetUnfolderBase]: For 97552/97552 co-relation queries the response was YES. [2024-06-27 19:03:55,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42575 conditions, 8018 events. 5278/8018 cut-off events. For 97552/97552 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 47168 event pairs, 1496 based on Foata normal form. 2/8013 useless extension candidates. Maximal degree in co-relation 42499. Up to 7246 conditions per place. [2024-06-27 19:03:55,536 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 196 selfloop transitions, 40 changer transitions 0/242 dead transitions. [2024-06-27 19:03:55,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 242 transitions, 3139 flow [2024-06-27 19:03:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:03:55,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937888198757764 [2024-06-27 19:03:55,537 INFO L175 Difference]: Start difference. First operand has 158 places, 202 transitions, 2482 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:03:55,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 242 transitions, 3139 flow [2024-06-27 19:03:55,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 2980 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 19:03:55,706 INFO L231 Difference]: Finished difference. Result has 157 places, 206 transitions, 2495 flow [2024-06-27 19:03:55,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2495, PETRI_PLACES=157, PETRI_TRANSITIONS=206} [2024-06-27 19:03:55,707 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 19:03:55,707 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 206 transitions, 2495 flow [2024-06-27 19:03:55,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:03:55,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:55,708 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 19:03:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:03:55,708 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 19:03:55,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -259196758, now seen corresponding path program 1 times [2024-06-27 19:03:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661483821] [2024-06-27 19:03:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:59,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:59,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661483821] [2024-06-27 19:03:59,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661483821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:59,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:59,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:59,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141183866] [2024-06-27 19:03:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:59,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:59,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:59,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:03:59,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 206 transitions, 2495 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:03:59,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:59,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:03:59,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:01,395 INFO L124 PetriNetUnfolderBase]: 5490/8416 cut-off events. [2024-06-27 19:04:01,395 INFO L125 PetriNetUnfolderBase]: For 98374/98374 co-relation queries the response was YES. [2024-06-27 19:04:01,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43622 conditions, 8416 events. 5490/8416 cut-off events. For 98374/98374 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49882 event pairs, 1509 based on Foata normal form. 12/8421 useless extension candidates. Maximal degree in co-relation 43546. Up to 7346 conditions per place. [2024-06-27 19:04:01,472 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 211 selfloop transitions, 33 changer transitions 0/250 dead transitions. [2024-06-27 19:04:01,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 250 transitions, 3212 flow [2024-06-27 19:04:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:04:01,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062111801242236 [2024-06-27 19:04:01,475 INFO L175 Difference]: Start difference. First operand has 157 places, 206 transitions, 2495 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:04:01,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 250 transitions, 3212 flow [2024-06-27 19:04:01,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 250 transitions, 3096 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:01,666 INFO L231 Difference]: Finished difference. Result has 159 places, 207 transitions, 2472 flow [2024-06-27 19:04:01,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2472, PETRI_PLACES=159, PETRI_TRANSITIONS=207} [2024-06-27 19:04:01,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-06-27 19:04:01,667 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 207 transitions, 2472 flow [2024-06-27 19:04:01,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:01,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:01,667 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 19:04:01,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:04:01,667 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:01,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash 959245260, now seen corresponding path program 4 times [2024-06-27 19:04:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:01,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633311254] [2024-06-27 19:04:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:04,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633311254] [2024-06-27 19:04:04,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633311254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:04,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:04,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676604103] [2024-06-27 19:04:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:04,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:04,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:04,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:04,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 207 transitions, 2472 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:04,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:04,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:04,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:07,113 INFO L124 PetriNetUnfolderBase]: 5582/8495 cut-off events. [2024-06-27 19:04:07,113 INFO L125 PetriNetUnfolderBase]: For 100105/100111 co-relation queries the response was YES. [2024-06-27 19:04:07,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44478 conditions, 8495 events. 5582/8495 cut-off events. For 100105/100111 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 49856 event pairs, 1388 based on Foata normal form. 8/8499 useless extension candidates. Maximal degree in co-relation 44401. Up to 6680 conditions per place. [2024-06-27 19:04:07,178 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 205 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-27 19:04:07,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 276 transitions, 3454 flow [2024-06-27 19:04:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:04:07,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:04:07,179 INFO L175 Difference]: Start difference. First operand has 159 places, 207 transitions, 2472 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:04:07,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 276 transitions, 3454 flow [2024-06-27 19:04:07,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 276 transitions, 3377 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:07,384 INFO L231 Difference]: Finished difference. Result has 163 places, 216 transitions, 2662 flow [2024-06-27 19:04:07,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2662, PETRI_PLACES=163, PETRI_TRANSITIONS=216} [2024-06-27 19:04:07,384 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 113 predicate places. [2024-06-27 19:04:07,385 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 216 transitions, 2662 flow [2024-06-27 19:04:07,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:07,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:07,385 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 19:04:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:04:07,385 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:07,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2013987596, now seen corresponding path program 5 times [2024-06-27 19:04:07,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:07,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155156179] [2024-06-27 19:04:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:07,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:11,002 INFO 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 19:04:11,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:11,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155156179] [2024-06-27 19:04:11,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155156179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300360898] [2024-06-27 19:04:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:11,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:11,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:11,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 216 transitions, 2662 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:11,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:11,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:13,122 INFO L124 PetriNetUnfolderBase]: 5590/8488 cut-off events. [2024-06-27 19:04:13,122 INFO L125 PetriNetUnfolderBase]: For 106199/106199 co-relation queries the response was YES. [2024-06-27 19:04:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45803 conditions, 8488 events. 5590/8488 cut-off events. For 106199/106199 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 50353 event pairs, 1534 based on Foata normal form. 4/8486 useless extension candidates. Maximal degree in co-relation 45724. Up to 7670 conditions per place. [2024-06-27 19:04:13,204 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 218 selfloop transitions, 43 changer transitions 0/267 dead transitions. [2024-06-27 19:04:13,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 267 transitions, 3417 flow [2024-06-27 19:04:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 19:04:13,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46859903381642515 [2024-06-27 19:04:13,206 INFO L175 Difference]: Start difference. First operand has 163 places, 216 transitions, 2662 flow. Second operand 9 states and 194 transitions. [2024-06-27 19:04:13,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 267 transitions, 3417 flow [2024-06-27 19:04:13,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 267 transitions, 3364 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:13,455 INFO L231 Difference]: Finished difference. Result has 170 places, 222 transitions, 2801 flow [2024-06-27 19:04:13,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2801, PETRI_PLACES=170, PETRI_TRANSITIONS=222} [2024-06-27 19:04:13,456 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2024-06-27 19:04:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 222 transitions, 2801 flow [2024-06-27 19:04:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:13,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:13,456 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 19:04:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:04:13,456 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:13,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash -225049372, now seen corresponding path program 6 times [2024-06-27 19:04:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941003272] [2024-06-27 19:04:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:16,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941003272] [2024-06-27 19:04:16,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941003272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:16,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:16,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:16,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954621577] [2024-06-27 19:04:16,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:16,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:16,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:16,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:16,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:16,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 222 transitions, 2801 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:16,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:16,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:16,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:18,664 INFO L124 PetriNetUnfolderBase]: 5806/8811 cut-off events. [2024-06-27 19:04:18,664 INFO L125 PetriNetUnfolderBase]: For 117453/117453 co-relation queries the response was YES. [2024-06-27 19:04:18,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48103 conditions, 8811 events. 5806/8811 cut-off events. For 117453/117453 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 51740 event pairs, 1425 based on Foata normal form. 4/8808 useless extension candidates. Maximal degree in co-relation 48020. Up to 7068 conditions per place. [2024-06-27 19:04:18,743 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 192 selfloop transitions, 82 changer transitions 0/280 dead transitions. [2024-06-27 19:04:18,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 280 transitions, 3751 flow [2024-06-27 19:04:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:04:18,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135869565217391 [2024-06-27 19:04:18,745 INFO L175 Difference]: Start difference. First operand has 170 places, 222 transitions, 2801 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:04:18,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 280 transitions, 3751 flow [2024-06-27 19:04:19,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 280 transitions, 3592 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:19,010 INFO L231 Difference]: Finished difference. Result has 172 places, 233 transitions, 3074 flow [2024-06-27 19:04:19,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3074, PETRI_PLACES=172, PETRI_TRANSITIONS=233} [2024-06-27 19:04:19,011 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-06-27 19:04:19,011 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 233 transitions, 3074 flow [2024-06-27 19:04:19,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:19,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:19,012 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 19:04:19,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:04:19,012 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:19,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1271737962, now seen corresponding path program 7 times [2024-06-27 19:04:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:19,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072970605] [2024-06-27 19:04:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072970605] [2024-06-27 19:04:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072970605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:21,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:21,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167953681] [2024-06-27 19:04:21,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:21,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:21,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:21,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 233 transitions, 3074 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:21,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:21,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:21,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:24,539 INFO L124 PetriNetUnfolderBase]: 5886/8903 cut-off events. [2024-06-27 19:04:24,539 INFO L125 PetriNetUnfolderBase]: For 132344/132344 co-relation queries the response was YES. [2024-06-27 19:04:24,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50674 conditions, 8903 events. 5886/8903 cut-off events. For 132344/132344 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 52049 event pairs, 1385 based on Foata normal form. 8/8904 useless extension candidates. Maximal degree in co-relation 50590. Up to 7128 conditions per place. [2024-06-27 19:04:24,629 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 209 selfloop transitions, 91 changer transitions 0/306 dead transitions. [2024-06-27 19:04:24,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 4072 flow [2024-06-27 19:04:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:04:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:04:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 19:04:24,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:04:24,630 INFO L175 Difference]: Start difference. First operand has 172 places, 233 transitions, 3074 flow. Second operand 11 states and 253 transitions. [2024-06-27 19:04:24,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 4072 flow [2024-06-27 19:04:25,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 306 transitions, 3931 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 19:04:25,012 INFO L231 Difference]: Finished difference. Result has 179 places, 237 transitions, 3214 flow [2024-06-27 19:04:25,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3214, PETRI_PLACES=179, PETRI_TRANSITIONS=237} [2024-06-27 19:04:25,013 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-06-27 19:04:25,013 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 237 transitions, 3214 flow [2024-06-27 19:04:25,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:25,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:25,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:25,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:04:25,014 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:25,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1277451882, now seen corresponding path program 8 times [2024-06-27 19:04:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971717224] [2024-06-27 19:04:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:28,088 INFO 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 19:04:28,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:28,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971717224] [2024-06-27 19:04:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971717224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:28,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:28,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826200680] [2024-06-27 19:04:28,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:28,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:28,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:28,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 237 transitions, 3214 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:28,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:28,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:28,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:30,555 INFO L124 PetriNetUnfolderBase]: 5874/8887 cut-off events. [2024-06-27 19:04:30,555 INFO L125 PetriNetUnfolderBase]: For 132186/132186 co-relation queries the response was YES. [2024-06-27 19:04:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51324 conditions, 8887 events. 5874/8887 cut-off events. For 132186/132186 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 51889 event pairs, 1411 based on Foata normal form. 4/8884 useless extension candidates. Maximal degree in co-relation 51238. Up to 7120 conditions per place. [2024-06-27 19:04:30,638 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 202 selfloop transitions, 89 changer transitions 0/297 dead transitions. [2024-06-27 19:04:30,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 297 transitions, 3996 flow [2024-06-27 19:04:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:04:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:04:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:04:30,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021739130434782 [2024-06-27 19:04:30,640 INFO L175 Difference]: Start difference. First operand has 179 places, 237 transitions, 3214 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:04:30,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 297 transitions, 3996 flow [2024-06-27 19:04:30,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 297 transitions, 3671 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 19:04:30,926 INFO L231 Difference]: Finished difference. Result has 181 places, 237 transitions, 3074 flow [2024-06-27 19:04:30,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3074, PETRI_PLACES=181, PETRI_TRANSITIONS=237} [2024-06-27 19:04:30,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-06-27 19:04:30,927 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 237 transitions, 3074 flow [2024-06-27 19:04:30,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 19:04:30,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:30,927 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 19:04:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:04:30,928 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:30,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1272120688, now seen corresponding path program 2 times [2024-06-27 19:04:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950990410] [2024-06-27 19:04:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:35,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:35,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950990410] [2024-06-27 19:04:35,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950990410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:35,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:35,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289516685] [2024-06-27 19:04:35,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:35,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:35,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:35,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:35,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:35,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 237 transitions, 3074 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:35,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:35,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:35,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:37,654 INFO L124 PetriNetUnfolderBase]: 6086/9328 cut-off events. [2024-06-27 19:04:37,654 INFO L125 PetriNetUnfolderBase]: For 139614/139614 co-relation queries the response was YES. [2024-06-27 19:04:37,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52308 conditions, 9328 events. 6086/9328 cut-off events. For 139614/139614 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 56252 event pairs, 1596 based on Foata normal form. 12/9333 useless extension candidates. Maximal degree in co-relation 52221. Up to 8128 conditions per place. [2024-06-27 19:04:37,914 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 245 selfloop transitions, 37 changer transitions 0/288 dead transitions. [2024-06-27 19:04:37,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 288 transitions, 3944 flow [2024-06-27 19:04:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:04:37,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:04:37,916 INFO L175 Difference]: Start difference. First operand has 181 places, 237 transitions, 3074 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:04:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 288 transitions, 3944 flow [2024-06-27 19:04:38,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 288 transitions, 3714 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:04:38,170 INFO L231 Difference]: Finished difference. Result has 179 places, 238 transitions, 2944 flow [2024-06-27 19:04:38,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2944, PETRI_PLACES=179, PETRI_TRANSITIONS=238} [2024-06-27 19:04:38,170 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-06-27 19:04:38,170 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 238 transitions, 2944 flow [2024-06-27 19:04:38,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:38,171 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 19:04:38,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:04:38,171 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1052452576, now seen corresponding path program 3 times [2024-06-27 19:04:38,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:38,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114090345] [2024-06-27 19:04:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:42,078 INFO 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 19:04:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114090345] [2024-06-27 19:04:42,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114090345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:42,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:42,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585279846] [2024-06-27 19:04:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:42,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:42,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:42,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:42,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 238 transitions, 2944 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:42,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:42,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:42,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:44,616 INFO L124 PetriNetUnfolderBase]: 6136/9372 cut-off events. [2024-06-27 19:04:44,616 INFO L125 PetriNetUnfolderBase]: For 136877/136877 co-relation queries the response was YES. [2024-06-27 19:04:44,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51979 conditions, 9372 events. 6136/9372 cut-off events. For 136877/136877 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 56168 event pairs, 1587 based on Foata normal form. 8/9373 useless extension candidates. Maximal degree in co-relation 51891. Up to 7780 conditions per place. [2024-06-27 19:04:44,725 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 246 selfloop transitions, 40 changer transitions 0/292 dead transitions. [2024-06-27 19:04:44,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 292 transitions, 3860 flow [2024-06-27 19:04:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:04:44,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027173913043478 [2024-06-27 19:04:44,726 INFO L175 Difference]: Start difference. First operand has 179 places, 238 transitions, 2944 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:04:44,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 292 transitions, 3860 flow [2024-06-27 19:04:45,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 292 transitions, 3784 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:45,015 INFO L231 Difference]: Finished difference. Result has 181 places, 239 transitions, 2974 flow [2024-06-27 19:04:45,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2974, PETRI_PLACES=181, PETRI_TRANSITIONS=239} [2024-06-27 19:04:45,016 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-06-27 19:04:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 239 transitions, 2974 flow [2024-06-27 19:04:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:45,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:45,017 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 19:04:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:04:45,017 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:45,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash 870539566, now seen corresponding path program 1 times [2024-06-27 19:04:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:45,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91882278] [2024-06-27 19:04:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:48,516 INFO 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 19:04:48,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:48,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91882278] [2024-06-27 19:04:48,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91882278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:48,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:48,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174371823] [2024-06-27 19:04:48,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:48,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:48,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:48,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:48,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 239 transitions, 2974 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:48,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:48,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:48,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:51,127 INFO L124 PetriNetUnfolderBase]: 6426/9723 cut-off events. [2024-06-27 19:04:51,127 INFO L125 PetriNetUnfolderBase]: For 148371/148371 co-relation queries the response was YES. [2024-06-27 19:04:51,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53995 conditions, 9723 events. 6426/9723 cut-off events. For 148371/148371 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 57914 event pairs, 1518 based on Foata normal form. 8/9729 useless extension candidates. Maximal degree in co-relation 53906. Up to 8092 conditions per place. [2024-06-27 19:04:51,232 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 278 selfloop transitions, 35 changer transitions 0/319 dead transitions. [2024-06-27 19:04:51,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 319 transitions, 4155 flow [2024-06-27 19:04:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:04:51,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529891304347826 [2024-06-27 19:04:51,234 INFO L175 Difference]: Start difference. First operand has 181 places, 239 transitions, 2974 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:04:51,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 319 transitions, 4155 flow [2024-06-27 19:04:51,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 319 transitions, 4069 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:51,566 INFO L231 Difference]: Finished difference. Result has 185 places, 245 transitions, 3047 flow [2024-06-27 19:04:51,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3047, PETRI_PLACES=185, PETRI_TRANSITIONS=245} [2024-06-27 19:04:51,567 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 135 predicate places. [2024-06-27 19:04:51,567 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 245 transitions, 3047 flow [2024-06-27 19:04:51,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:51,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:51,567 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 19:04:51,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:04:51,567 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:51,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 872417236, now seen corresponding path program 2 times [2024-06-27 19:04:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:51,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589481187] [2024-06-27 19:04:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:55,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:55,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589481187] [2024-06-27 19:04:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589481187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:55,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:55,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:55,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656481001] [2024-06-27 19:04:55,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:55,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:04:55,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 245 transitions, 3047 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:55,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:55,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:04:55,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:58,059 INFO L124 PetriNetUnfolderBase]: 6638/10065 cut-off events. [2024-06-27 19:04:58,059 INFO L125 PetriNetUnfolderBase]: For 161774/161776 co-relation queries the response was YES. [2024-06-27 19:04:58,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55828 conditions, 10065 events. 6638/10065 cut-off events. For 161774/161776 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 60689 event pairs, 2756 based on Foata normal form. 12/10075 useless extension candidates. Maximal degree in co-relation 55736. Up to 8838 conditions per place. [2024-06-27 19:04:58,156 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 267 selfloop transitions, 35 changer transitions 0/308 dead transitions. [2024-06-27 19:04:58,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 308 transitions, 3985 flow [2024-06-27 19:04:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:04:58,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830917874396135 [2024-06-27 19:04:58,157 INFO L175 Difference]: Start difference. First operand has 185 places, 245 transitions, 3047 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:04:58,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 308 transitions, 3985 flow [2024-06-27 19:04:58,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 308 transitions, 3944 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:58,408 INFO L231 Difference]: Finished difference. Result has 192 places, 248 transitions, 3110 flow [2024-06-27 19:04:58,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3110, PETRI_PLACES=192, PETRI_TRANSITIONS=248} [2024-06-27 19:04:58,408 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 142 predicate places. [2024-06-27 19:04:58,408 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 248 transitions, 3110 flow [2024-06-27 19:04:58,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:04:58,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:58,409 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 19:04:58,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:04:58,409 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:58,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2009387844, now seen corresponding path program 3 times [2024-06-27 19:04:58,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:58,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108668781] [2024-06-27 19:04:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:58,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:01,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108668781] [2024-06-27 19:05:01,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108668781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:01,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746100105] [2024-06-27 19:05:01,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:01,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:01,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:02,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:02,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 248 transitions, 3110 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:02,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:02,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:02,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:04,538 INFO L124 PetriNetUnfolderBase]: 6774/10253 cut-off events. [2024-06-27 19:05:04,539 INFO L125 PetriNetUnfolderBase]: For 165923/165925 co-relation queries the response was YES. [2024-06-27 19:05:04,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57525 conditions, 10253 events. 6774/10253 cut-off events. For 165923/165925 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 61840 event pairs, 2738 based on Foata normal form. 8/10259 useless extension candidates. Maximal degree in co-relation 57430. Up to 8856 conditions per place. [2024-06-27 19:05:04,655 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 272 selfloop transitions, 36 changer transitions 0/314 dead transitions. [2024-06-27 19:05:04,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 314 transitions, 4089 flow [2024-06-27 19:05:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:05:04,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:05:04,657 INFO L175 Difference]: Start difference. First operand has 192 places, 248 transitions, 3110 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:05:04,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 314 transitions, 4089 flow [2024-06-27 19:05:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 314 transitions, 4032 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:05,029 INFO L231 Difference]: Finished difference. Result has 196 places, 251 transitions, 3170 flow [2024-06-27 19:05:05,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3170, PETRI_PLACES=196, PETRI_TRANSITIONS=251} [2024-06-27 19:05:05,030 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-27 19:05:05,030 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 251 transitions, 3170 flow [2024-06-27 19:05:05,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:05,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:05,030 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 19:05:05,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:05:05,030 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:05,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1089411930, now seen corresponding path program 4 times [2024-06-27 19:05:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:05,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822316899] [2024-06-27 19:05:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:09,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822316899] [2024-06-27 19:05:09,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822316899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:09,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:09,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:09,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441668462] [2024-06-27 19:05:09,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:09,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:09,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:09,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:09,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 251 transitions, 3170 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:09,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:09,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:09,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:11,647 INFO L124 PetriNetUnfolderBase]: 6986/10732 cut-off events. [2024-06-27 19:05:11,647 INFO L125 PetriNetUnfolderBase]: For 178199/178201 co-relation queries the response was YES. [2024-06-27 19:05:11,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59829 conditions, 10732 events. 6986/10732 cut-off events. For 178199/178201 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 66761 event pairs, 2969 based on Foata normal form. 12/10742 useless extension candidates. Maximal degree in co-relation 59731. Up to 9548 conditions per place. [2024-06-27 19:05:11,761 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 270 selfloop transitions, 27 changer transitions 0/303 dead transitions. [2024-06-27 19:05:11,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 303 transitions, 3987 flow [2024-06-27 19:05:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:05:11,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2024-06-27 19:05:11,762 INFO L175 Difference]: Start difference. First operand has 196 places, 251 transitions, 3170 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:05:11,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 303 transitions, 3987 flow [2024-06-27 19:05:12,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 303 transitions, 3942 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:05:12,103 INFO L231 Difference]: Finished difference. Result has 200 places, 253 transitions, 3236 flow [2024-06-27 19:05:12,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3236, PETRI_PLACES=200, PETRI_TRANSITIONS=253} [2024-06-27 19:05:12,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-27 19:05:12,104 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 253 transitions, 3236 flow [2024-06-27 19:05:12,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:12,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:12,105 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 19:05:12,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:05:12,107 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 19:05:12,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1284817420, now seen corresponding path program 1 times [2024-06-27 19:05:12,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:12,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570436440] [2024-06-27 19:05:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:12,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:15,614 INFO 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 19:05:15,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570436440] [2024-06-27 19:05:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570436440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:15,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:15,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:15,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400687053] [2024-06-27 19:05:15,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:15,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:15,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:15,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:15,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 253 transitions, 3236 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:15,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:15,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:15,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:18,510 INFO L124 PetriNetUnfolderBase]: 7128/10962 cut-off events. [2024-06-27 19:05:18,511 INFO L125 PetriNetUnfolderBase]: For 185651/185653 co-relation queries the response was YES. [2024-06-27 19:05:18,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61610 conditions, 10962 events. 7128/10962 cut-off events. For 185651/185653 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 68392 event pairs, 3011 based on Foata normal form. 12/10972 useless extension candidates. Maximal degree in co-relation 61510. Up to 9758 conditions per place. [2024-06-27 19:05:18,631 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 285 selfloop transitions, 28 changer transitions 0/319 dead transitions. [2024-06-27 19:05:18,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 319 transitions, 4153 flow [2024-06-27 19:05:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:05:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:05:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:05:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48043478260869565 [2024-06-27 19:05:18,633 INFO L175 Difference]: Start difference. First operand has 200 places, 253 transitions, 3236 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:05:18,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 319 transitions, 4153 flow [2024-06-27 19:05:19,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 319 transitions, 4073 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:19,033 INFO L231 Difference]: Finished difference. Result has 204 places, 255 transitions, 3273 flow [2024-06-27 19:05:19,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3273, PETRI_PLACES=204, PETRI_TRANSITIONS=255} [2024-06-27 19:05:19,034 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2024-06-27 19:05:19,034 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 255 transitions, 3273 flow [2024-06-27 19:05:19,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:19,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:19,035 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 19:05:19,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:05:19,035 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 19:05:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1052446624, now seen corresponding path program 2 times [2024-06-27 19:05:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:19,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96698921] [2024-06-27 19:05:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:22,780 INFO 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 19:05:22,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:22,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96698921] [2024-06-27 19:05:22,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96698921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:22,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:22,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:22,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321368777] [2024-06-27 19:05:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:22,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:22,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:22,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 255 transitions, 3273 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:22,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:22,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:22,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:25,571 INFO L124 PetriNetUnfolderBase]: 7146/10952 cut-off events. [2024-06-27 19:05:25,571 INFO L125 PetriNetUnfolderBase]: For 181910/181912 co-relation queries the response was YES. [2024-06-27 19:05:25,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61528 conditions, 10952 events. 7146/10952 cut-off events. For 181910/181912 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 67879 event pairs, 2920 based on Foata normal form. 8/10958 useless extension candidates. Maximal degree in co-relation 61427. Up to 9384 conditions per place. [2024-06-27 19:05:25,685 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 285 selfloop transitions, 35 changer transitions 0/326 dead transitions. [2024-06-27 19:05:25,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 326 transitions, 4283 flow [2024-06-27 19:05:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:05:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:05:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-27 19:05:25,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826086956521739 [2024-06-27 19:05:25,686 INFO L175 Difference]: Start difference. First operand has 204 places, 255 transitions, 3273 flow. Second operand 10 states and 222 transitions. [2024-06-27 19:05:25,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 326 transitions, 4283 flow [2024-06-27 19:05:26,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 326 transitions, 4202 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:05:26,112 INFO L231 Difference]: Finished difference. Result has 208 places, 260 transitions, 3391 flow [2024-06-27 19:05:26,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3391, PETRI_PLACES=208, PETRI_TRANSITIONS=260} [2024-06-27 19:05:26,113 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 158 predicate places. [2024-06-27 19:05:26,113 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 260 transitions, 3391 flow [2024-06-27 19:05:26,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:26,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:26,113 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 19:05:26,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:05:26,114 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 19:05:26,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1078010158, now seen corresponding path program 5 times [2024-06-27 19:05:26,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:26,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217358211] [2024-06-27 19:05:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:30,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:30,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217358211] [2024-06-27 19:05:30,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217358211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:30,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:30,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:30,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638920950] [2024-06-27 19:05:30,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:30,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:30,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:30,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:30,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:30,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 260 transitions, 3391 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:30,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:30,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:32,729 INFO L124 PetriNetUnfolderBase]: 7156/10990 cut-off events. [2024-06-27 19:05:32,729 INFO L125 PetriNetUnfolderBase]: For 185838/185840 co-relation queries the response was YES. [2024-06-27 19:05:32,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61876 conditions, 10990 events. 7156/10990 cut-off events. For 185838/185840 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 68334 event pairs, 2996 based on Foata normal form. 8/10996 useless extension candidates. Maximal degree in co-relation 61773. Up to 9402 conditions per place. [2024-06-27 19:05:32,836 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 278 selfloop transitions, 33 changer transitions 0/317 dead transitions. [2024-06-27 19:05:32,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 317 transitions, 4312 flow [2024-06-27 19:05:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:05:32,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49728260869565216 [2024-06-27 19:05:32,838 INFO L175 Difference]: Start difference. First operand has 208 places, 260 transitions, 3391 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:05:32,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 317 transitions, 4312 flow [2024-06-27 19:05:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 317 transitions, 4191 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 19:05:33,228 INFO L231 Difference]: Finished difference. Result has 210 places, 265 transitions, 3458 flow [2024-06-27 19:05:33,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=210, PETRI_TRANSITIONS=265} [2024-06-27 19:05:33,229 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-27 19:05:33,229 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 265 transitions, 3458 flow [2024-06-27 19:05:33,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:33,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:33,229 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 19:05:33,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:05:33,229 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:33,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1878365516, now seen corresponding path program 1 times [2024-06-27 19:05:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140402568] [2024-06-27 19:05:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:33,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:33,314 INFO 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 19:05:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140402568] [2024-06-27 19:05:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140402568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:33,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:33,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:05:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419540046] [2024-06-27 19:05:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:05:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:05:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:05:33,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 19:05:33,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 265 transitions, 3458 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 19:05:33,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:33,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 19:05:33,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:34,832 INFO L124 PetriNetUnfolderBase]: 4954/8025 cut-off events. [2024-06-27 19:05:34,832 INFO L125 PetriNetUnfolderBase]: For 170625/170972 co-relation queries the response was YES. [2024-06-27 19:05:34,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44727 conditions, 8025 events. 4954/8025 cut-off events. For 170625/170972 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 52075 event pairs, 936 based on Foata normal form. 461/8340 useless extension candidates. Maximal degree in co-relation 44623. Up to 3245 conditions per place. [2024-06-27 19:05:34,911 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 141 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-27 19:05:34,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 263 transitions, 3778 flow [2024-06-27 19:05:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:05:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:05:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-27 19:05:34,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 19:05:34,912 INFO L175 Difference]: Start difference. First operand has 210 places, 265 transitions, 3458 flow. Second operand 4 states and 114 transitions. [2024-06-27 19:05:34,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 263 transitions, 3778 flow [2024-06-27 19:05:35,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 263 transitions, 3368 flow, removed 107 selfloop flow, removed 14 redundant places. [2024-06-27 19:05:35,274 INFO L231 Difference]: Finished difference. Result has 201 places, 223 transitions, 2819 flow [2024-06-27 19:05:35,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2819, PETRI_PLACES=201, PETRI_TRANSITIONS=223} [2024-06-27 19:05:35,274 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-06-27 19:05:35,274 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 223 transitions, 2819 flow [2024-06-27 19:05:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 19:05:35,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:35,275 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 19:05:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:05:35,275 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 19:05:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash -623534793, now seen corresponding path program 1 times [2024-06-27 19:05:35,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:35,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749888587] [2024-06-27 19:05:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:35,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:39,088 INFO 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 19:05:39,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:39,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749888587] [2024-06-27 19:05:39,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749888587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:39,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:39,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903542498] [2024-06-27 19:05:39,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:39,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:39,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:39,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:39,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 223 transitions, 2819 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:39,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:39,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:39,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:42,476 INFO L124 PetriNetUnfolderBase]: 6069/9390 cut-off events. [2024-06-27 19:05:42,476 INFO L125 PetriNetUnfolderBase]: For 173958/173960 co-relation queries the response was YES. [2024-06-27 19:05:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54003 conditions, 9390 events. 6069/9390 cut-off events. For 173958/173960 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 57011 event pairs, 2073 based on Foata normal form. 4/9388 useless extension candidates. Maximal degree in co-relation 53903. Up to 7929 conditions per place. [2024-06-27 19:05:42,561 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 174 selfloop transitions, 94 changer transitions 9/283 dead transitions. [2024-06-27 19:05:42,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 283 transitions, 3879 flow [2024-06-27 19:05:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:05:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:05:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-27 19:05:42,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:05:42,562 INFO L175 Difference]: Start difference. First operand has 201 places, 223 transitions, 2819 flow. Second operand 11 states and 230 transitions. [2024-06-27 19:05:42,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 283 transitions, 3879 flow [2024-06-27 19:05:42,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 283 transitions, 3871 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 19:05:42,905 INFO L231 Difference]: Finished difference. Result has 211 places, 231 transitions, 3223 flow [2024-06-27 19:05:42,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3223, PETRI_PLACES=211, PETRI_TRANSITIONS=231} [2024-06-27 19:05:42,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-06-27 19:05:42,906 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 231 transitions, 3223 flow [2024-06-27 19:05:42,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:42,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:42,906 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 19:05:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:05:42,906 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 19:05:42,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -681998443, now seen corresponding path program 1 times [2024-06-27 19:05:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:42,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180333681] [2024-06-27 19:05:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:46,420 INFO 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 19:05:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:46,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180333681] [2024-06-27 19:05:46,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180333681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:46,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:46,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:46,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470801143] [2024-06-27 19:05:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:46,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:46,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:46,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:46,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 231 transitions, 3223 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:46,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:46,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:46,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:49,092 INFO L124 PetriNetUnfolderBase]: 5548/8563 cut-off events. [2024-06-27 19:05:49,092 INFO L125 PetriNetUnfolderBase]: For 171502/171504 co-relation queries the response was YES. [2024-06-27 19:05:49,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48951 conditions, 8563 events. 5548/8563 cut-off events. For 171502/171504 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 50331 event pairs, 1874 based on Foata normal form. 8/8565 useless extension candidates. Maximal degree in co-relation 48848. Up to 7298 conditions per place. [2024-06-27 19:05:49,171 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 239 selfloop transitions, 36 changer transitions 0/281 dead transitions. [2024-06-27 19:05:49,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 281 transitions, 4155 flow [2024-06-27 19:05:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:05:49,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49184782608695654 [2024-06-27 19:05:49,172 INFO L175 Difference]: Start difference. First operand has 211 places, 231 transitions, 3223 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:05:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 281 transitions, 4155 flow [2024-06-27 19:05:49,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 281 transitions, 3896 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 19:05:49,488 INFO L231 Difference]: Finished difference. Result has 212 places, 232 transitions, 3071 flow [2024-06-27 19:05:49,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3071, PETRI_PLACES=212, PETRI_TRANSITIONS=232} [2024-06-27 19:05:49,489 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 162 predicate places. [2024-06-27 19:05:49,489 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 232 transitions, 3071 flow [2024-06-27 19:05:49,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:49,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:49,489 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 19:05:49,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:05:49,490 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 19:05:49,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:49,490 INFO L85 PathProgramCache]: Analyzing trace with hash -918595687, now seen corresponding path program 2 times [2024-06-27 19:05:49,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:49,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107188443] [2024-06-27 19:05:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:53,019 INFO 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 19:05:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107188443] [2024-06-27 19:05:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107188443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:53,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:53,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129328928] [2024-06-27 19:05:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:53,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:53,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 232 transitions, 3071 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:53,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:53,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:53,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:55,420 INFO L124 PetriNetUnfolderBase]: 5530/8525 cut-off events. [2024-06-27 19:05:55,421 INFO L125 PetriNetUnfolderBase]: For 163334/163336 co-relation queries the response was YES. [2024-06-27 19:05:55,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47997 conditions, 8525 events. 5530/8525 cut-off events. For 163334/163336 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 50038 event pairs, 2104 based on Foata normal form. 8/8527 useless extension candidates. Maximal degree in co-relation 47893. Up to 7537 conditions per place. [2024-06-27 19:05:55,510 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 231 selfloop transitions, 33 changer transitions 0/270 dead transitions. [2024-06-27 19:05:55,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 270 transitions, 3807 flow [2024-06-27 19:05:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 19:05:55,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46467391304347827 [2024-06-27 19:05:55,512 INFO L175 Difference]: Start difference. First operand has 212 places, 232 transitions, 3071 flow. Second operand 8 states and 171 transitions. [2024-06-27 19:05:55,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 270 transitions, 3807 flow [2024-06-27 19:05:55,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 3739 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:55,826 INFO L231 Difference]: Finished difference. Result has 215 places, 232 transitions, 3073 flow [2024-06-27 19:05:55,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3073, PETRI_PLACES=215, PETRI_TRANSITIONS=232} [2024-06-27 19:05:55,827 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-06-27 19:05:55,827 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 232 transitions, 3073 flow [2024-06-27 19:05:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:55,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:55,828 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 19:05:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:05:55,828 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 19:05:55,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash -593340427, now seen corresponding path program 2 times [2024-06-27 19:05:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:55,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948461567] [2024-06-27 19:05:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:58,711 INFO 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 19:05:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948461567] [2024-06-27 19:05:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948461567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:58,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:58,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:58,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738768655] [2024-06-27 19:05:58,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:58,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:58,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:58,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:05:58,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 232 transitions, 3073 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:05:58,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:05:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:01,372 INFO L124 PetriNetUnfolderBase]: 5598/8637 cut-off events. [2024-06-27 19:06:01,373 INFO L125 PetriNetUnfolderBase]: For 157819/157821 co-relation queries the response was YES. [2024-06-27 19:06:01,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48048 conditions, 8637 events. 5598/8637 cut-off events. For 157819/157821 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50743 event pairs, 2010 based on Foata normal form. 4/8635 useless extension candidates. Maximal degree in co-relation 47943. Up to 7678 conditions per place. [2024-06-27 19:06:01,466 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 189 selfloop transitions, 73 changer transitions 0/268 dead transitions. [2024-06-27 19:06:01,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 268 transitions, 3795 flow [2024-06-27 19:06:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 19:06:01,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592391304347826 [2024-06-27 19:06:01,467 INFO L175 Difference]: Start difference. First operand has 215 places, 232 transitions, 3073 flow. Second operand 8 states and 169 transitions. [2024-06-27 19:06:01,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 268 transitions, 3795 flow [2024-06-27 19:06:01,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 268 transitions, 3683 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:06:01,807 INFO L231 Difference]: Finished difference. Result has 218 places, 241 transitions, 3331 flow [2024-06-27 19:06:01,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=218, PETRI_TRANSITIONS=241} [2024-06-27 19:06:01,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-27 19:06:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 241 transitions, 3331 flow [2024-06-27 19:06:01,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:01,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:01,808 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 19:06:01,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:06:01,808 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 19:06:01,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:01,808 INFO L85 PathProgramCache]: Analyzing trace with hash 267220953, now seen corresponding path program 3 times [2024-06-27 19:06:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920048253] [2024-06-27 19:06:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:01,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:05,007 INFO 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 19:06:05,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:05,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920048253] [2024-06-27 19:06:05,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920048253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:05,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:05,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:05,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457407885] [2024-06-27 19:06:05,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:05,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:05,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:05,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:05,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 241 transitions, 3331 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:05,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:05,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:05,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:08,476 INFO L124 PetriNetUnfolderBase]: 5674/8765 cut-off events. [2024-06-27 19:06:08,476 INFO L125 PetriNetUnfolderBase]: For 163473/163475 co-relation queries the response was YES. [2024-06-27 19:06:08,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49143 conditions, 8765 events. 5674/8765 cut-off events. For 163473/163475 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 51746 event pairs, 2023 based on Foata normal form. 4/8763 useless extension candidates. Maximal degree in co-relation 49035. Up to 7393 conditions per place. [2024-06-27 19:06:08,554 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 179 selfloop transitions, 105 changer transitions 0/290 dead transitions. [2024-06-27 19:06:08,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 290 transitions, 4257 flow [2024-06-27 19:06:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:06:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:06:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-27 19:06:08,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311594202898551 [2024-06-27 19:06:08,555 INFO L175 Difference]: Start difference. First operand has 218 places, 241 transitions, 3331 flow. Second operand 12 states and 238 transitions. [2024-06-27 19:06:08,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 290 transitions, 4257 flow [2024-06-27 19:06:08,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 290 transitions, 4062 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:06:08,897 INFO L231 Difference]: Finished difference. Result has 223 places, 247 transitions, 3438 flow [2024-06-27 19:06:08,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3438, PETRI_PLACES=223, PETRI_TRANSITIONS=247} [2024-06-27 19:06:08,897 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-27 19:06:08,898 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 247 transitions, 3438 flow [2024-06-27 19:06:08,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:08,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:08,898 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 19:06:08,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:06:08,898 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 19:06:08,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash 267231183, now seen corresponding path program 4 times [2024-06-27 19:06:08,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:08,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908996321] [2024-06-27 19:06:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:08,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:12,430 INFO 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 19:06:12,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:12,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908996321] [2024-06-27 19:06:12,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908996321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:12,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:12,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686144426] [2024-06-27 19:06:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:12,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:12,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:12,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:12,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 247 transitions, 3438 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:12,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:12,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:12,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:15,629 INFO L124 PetriNetUnfolderBase]: 5662/8740 cut-off events. [2024-06-27 19:06:15,629 INFO L125 PetriNetUnfolderBase]: For 163604/163606 co-relation queries the response was YES. [2024-06-27 19:06:15,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48856 conditions, 8740 events. 5662/8740 cut-off events. For 163604/163606 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 51521 event pairs, 2020 based on Foata normal form. 4/8738 useless extension candidates. Maximal degree in co-relation 48748. Up to 7385 conditions per place. [2024-06-27 19:06:15,709 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 173 selfloop transitions, 103 changer transitions 0/282 dead transitions. [2024-06-27 19:06:15,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 282 transitions, 4158 flow [2024-06-27 19:06:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:06:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:06:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:06:15,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-06-27 19:06:15,710 INFO L175 Difference]: Start difference. First operand has 223 places, 247 transitions, 3438 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:06:15,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 282 transitions, 4158 flow [2024-06-27 19:06:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 282 transitions, 3942 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:16,044 INFO L231 Difference]: Finished difference. Result has 225 places, 247 transitions, 3435 flow [2024-06-27 19:06:16,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3435, PETRI_PLACES=225, PETRI_TRANSITIONS=247} [2024-06-27 19:06:16,044 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 175 predicate places. [2024-06-27 19:06:16,045 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 247 transitions, 3435 flow [2024-06-27 19:06:16,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:16,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:16,045 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 19:06:16,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:06:16,045 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 19:06:16,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:16,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2102372667, now seen corresponding path program 5 times [2024-06-27 19:06:16,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:16,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628165616] [2024-06-27 19:06:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:16,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:19,833 INFO 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 19:06:19,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628165616] [2024-06-27 19:06:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628165616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:19,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761023643] [2024-06-27 19:06:19,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:19,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:19,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 247 transitions, 3435 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:19,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:19,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:19,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:22,538 INFO L124 PetriNetUnfolderBase]: 5754/8881 cut-off events. [2024-06-27 19:06:22,538 INFO L125 PetriNetUnfolderBase]: For 173600/173602 co-relation queries the response was YES. [2024-06-27 19:06:22,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49833 conditions, 8881 events. 5754/8881 cut-off events. For 173600/173602 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 52520 event pairs, 2246 based on Foata normal form. 4/8879 useless extension candidates. Maximal degree in co-relation 49724. Up to 7996 conditions per place. [2024-06-27 19:06:22,639 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 219 selfloop transitions, 58 changer transitions 0/283 dead transitions. [2024-06-27 19:06:22,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 283 transitions, 4279 flow [2024-06-27 19:06:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:06:22,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323671497584541 [2024-06-27 19:06:22,640 INFO L175 Difference]: Start difference. First operand has 225 places, 247 transitions, 3435 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:06:22,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 283 transitions, 4279 flow [2024-06-27 19:06:23,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 283 transitions, 4055 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:06:23,091 INFO L231 Difference]: Finished difference. Result has 226 places, 256 transitions, 3492 flow [2024-06-27 19:06:23,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3492, PETRI_PLACES=226, PETRI_TRANSITIONS=256} [2024-06-27 19:06:23,092 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 176 predicate places. [2024-06-27 19:06:23,092 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 256 transitions, 3492 flow [2024-06-27 19:06:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:23,093 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 19:06:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:06:23,093 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 19:06:23,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash 554590577, now seen corresponding path program 6 times [2024-06-27 19:06:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801669424] [2024-06-27 19:06:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:26,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801669424] [2024-06-27 19:06:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801669424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:26,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957966794] [2024-06-27 19:06:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:26,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:26,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:26,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 256 transitions, 3492 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:26,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:26,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:26,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:29,112 INFO L124 PetriNetUnfolderBase]: 5786/8949 cut-off events. [2024-06-27 19:06:29,112 INFO L125 PetriNetUnfolderBase]: For 177120/177122 co-relation queries the response was YES. [2024-06-27 19:06:29,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49991 conditions, 8949 events. 5786/8949 cut-off events. For 177120/177122 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 53184 event pairs, 2249 based on Foata normal form. 4/8947 useless extension candidates. Maximal degree in co-relation 49880. Up to 8020 conditions per place. [2024-06-27 19:06:29,207 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 221 selfloop transitions, 62 changer transitions 0/289 dead transitions. [2024-06-27 19:06:29,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 289 transitions, 4273 flow [2024-06-27 19:06:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:06:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:06:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 19:06:29,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282608695652174 [2024-06-27 19:06:29,208 INFO L175 Difference]: Start difference. First operand has 226 places, 256 transitions, 3492 flow. Second operand 10 states and 197 transitions. [2024-06-27 19:06:29,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 289 transitions, 4273 flow [2024-06-27 19:06:29,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 4189 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:29,636 INFO L231 Difference]: Finished difference. Result has 231 places, 259 transitions, 3593 flow [2024-06-27 19:06:29,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3593, PETRI_PLACES=231, PETRI_TRANSITIONS=259} [2024-06-27 19:06:29,637 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 181 predicate places. [2024-06-27 19:06:29,637 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 259 transitions, 3593 flow [2024-06-27 19:06:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:29,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:29,637 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 19:06:29,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:06:29,637 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 19:06:29,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash 548161487, now seen corresponding path program 7 times [2024-06-27 19:06:29,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:29,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658316954] [2024-06-27 19:06:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:29,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:33,572 INFO 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 19:06:33,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:33,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658316954] [2024-06-27 19:06:33,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658316954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:33,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:33,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:33,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698458112] [2024-06-27 19:06:33,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:33,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:33,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:33,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:33,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 259 transitions, 3593 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:33,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:33,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:33,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:36,444 INFO L124 PetriNetUnfolderBase]: 5774/8933 cut-off events. [2024-06-27 19:06:36,444 INFO L125 PetriNetUnfolderBase]: For 176029/176031 co-relation queries the response was YES. [2024-06-27 19:06:36,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50005 conditions, 8933 events. 5774/8933 cut-off events. For 176029/176031 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 53112 event pairs, 2247 based on Foata normal form. 4/8931 useless extension candidates. Maximal degree in co-relation 49892. Up to 8012 conditions per place. [2024-06-27 19:06:36,530 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 217 selfloop transitions, 62 changer transitions 0/285 dead transitions. [2024-06-27 19:06:36,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 285 transitions, 4207 flow [2024-06-27 19:06:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:06:36,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323671497584541 [2024-06-27 19:06:36,531 INFO L175 Difference]: Start difference. First operand has 231 places, 259 transitions, 3593 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:06:36,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 285 transitions, 4207 flow [2024-06-27 19:06:36,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 285 transitions, 4075 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:06:36,955 INFO L231 Difference]: Finished difference. Result has 234 places, 259 transitions, 3591 flow [2024-06-27 19:06:36,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3591, PETRI_PLACES=234, PETRI_TRANSITIONS=259} [2024-06-27 19:06:36,956 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 184 predicate places. [2024-06-27 19:06:36,956 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 259 transitions, 3591 flow [2024-06-27 19:06:36,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:36,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:36,956 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 19:06:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:06:36,956 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 19:06:36,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash -328166513, now seen corresponding path program 8 times [2024-06-27 19:06:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164458298] [2024-06-27 19:06:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164458298] [2024-06-27 19:06:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164458298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:40,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:06:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303316508] [2024-06-27 19:06:40,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:40,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:06:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:06:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:06:40,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:40,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 259 transitions, 3591 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 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 19:06:40,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:40,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:40,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:43,618 INFO L124 PetriNetUnfolderBase]: 5806/8989 cut-off events. [2024-06-27 19:06:43,618 INFO L125 PetriNetUnfolderBase]: For 180359/180361 co-relation queries the response was YES. [2024-06-27 19:06:43,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50315 conditions, 8989 events. 5806/8989 cut-off events. For 180359/180361 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 53473 event pairs, 2100 based on Foata normal form. 6/8989 useless extension candidates. Maximal degree in co-relation 50201. Up to 7240 conditions per place. [2024-06-27 19:06:43,724 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 165 selfloop transitions, 126 changer transitions 0/297 dead transitions. [2024-06-27 19:06:43,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 297 transitions, 4429 flow [2024-06-27 19:06:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:06:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:06:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 19:06:43,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369565217391304 [2024-06-27 19:06:43,725 INFO L175 Difference]: Start difference. First operand has 234 places, 259 transitions, 3591 flow. Second operand 10 states and 201 transitions. [2024-06-27 19:06:43,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 297 transitions, 4429 flow [2024-06-27 19:06:44,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 297 transitions, 4291 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:44,241 INFO L231 Difference]: Finished difference. Result has 236 places, 262 transitions, 3780 flow [2024-06-27 19:06:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3780, PETRI_PLACES=236, PETRI_TRANSITIONS=262} [2024-06-27 19:06:44,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-06-27 19:06:44,242 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 262 transitions, 3780 flow [2024-06-27 19:06:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 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 19:06:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:44,242 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 19:06:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:06:44,242 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 19:06:44,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1978928015, now seen corresponding path program 9 times [2024-06-27 19:06:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160074449] [2024-06-27 19:06:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:48,028 INFO 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 19:06:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160074449] [2024-06-27 19:06:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160074449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:48,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:48,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286789729] [2024-06-27 19:06:48,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:48,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:48,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 262 transitions, 3780 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:48,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:48,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:48,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:50,364 INFO L124 PetriNetUnfolderBase]: 5838/9045 cut-off events. [2024-06-27 19:06:50,364 INFO L125 PetriNetUnfolderBase]: For 187316/187318 co-relation queries the response was YES. [2024-06-27 19:06:50,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51238 conditions, 9045 events. 5838/9045 cut-off events. For 187316/187318 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 54024 event pairs, 2255 based on Foata normal form. 4/9043 useless extension candidates. Maximal degree in co-relation 51123. Up to 7776 conditions per place. [2024-06-27 19:06:50,467 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 203 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-27 19:06:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 295 transitions, 4701 flow [2024-06-27 19:06:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:06:50,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396135265700483 [2024-06-27 19:06:50,469 INFO L175 Difference]: Start difference. First operand has 236 places, 262 transitions, 3780 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:06:50,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 295 transitions, 4701 flow [2024-06-27 19:06:50,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 295 transitions, 4362 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:50,957 INFO L231 Difference]: Finished difference. Result has 237 places, 265 transitions, 3694 flow [2024-06-27 19:06:50,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3694, PETRI_PLACES=237, PETRI_TRANSITIONS=265} [2024-06-27 19:06:50,958 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-06-27 19:06:50,958 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 265 transitions, 3694 flow [2024-06-27 19:06:50,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:50,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:50,958 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 19:06:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:06:50,958 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 19:06:50,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash -949048467, now seen corresponding path program 10 times [2024-06-27 19:06:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:50,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352643911] [2024-06-27 19:06:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:54,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:54,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352643911] [2024-06-27 19:06:54,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352643911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:54,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:54,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:54,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241815932] [2024-06-27 19:06:54,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:54,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:54,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:54,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:06:54,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 265 transitions, 3694 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:54,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:54,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:06:54,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:57,060 INFO L124 PetriNetUnfolderBase]: 5870/9089 cut-off events. [2024-06-27 19:06:57,060 INFO L125 PetriNetUnfolderBase]: For 188986/188988 co-relation queries the response was YES. [2024-06-27 19:06:57,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51177 conditions, 9089 events. 5870/9089 cut-off events. For 188986/188988 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 54406 event pairs, 2388 based on Foata normal form. 4/9087 useless extension candidates. Maximal degree in co-relation 51062. Up to 8308 conditions per place. [2024-06-27 19:06:57,167 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 246 selfloop transitions, 42 changer transitions 0/294 dead transitions. [2024-06-27 19:06:57,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 294 transitions, 4488 flow [2024-06-27 19:06:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 19:06:57,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2024-06-27 19:06:57,168 INFO L175 Difference]: Start difference. First operand has 237 places, 265 transitions, 3694 flow. Second operand 9 states and 176 transitions. [2024-06-27 19:06:57,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 294 transitions, 4488 flow [2024-06-27 19:06:57,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 294 transitions, 4213 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:06:57,650 INFO L231 Difference]: Finished difference. Result has 239 places, 268 transitions, 3567 flow [2024-06-27 19:06:57,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3567, PETRI_PLACES=239, PETRI_TRANSITIONS=268} [2024-06-27 19:06:57,650 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-06-27 19:06:57,651 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 268 transitions, 3567 flow [2024-06-27 19:06:57,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:06:57,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:57,651 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 19:06:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:06:57,651 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 19:06:57,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1601430879, now seen corresponding path program 11 times [2024-06-27 19:06:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313590263] [2024-06-27 19:06:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:01,860 INFO 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 19:07:01,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313590263] [2024-06-27 19:07:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313590263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:01,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:01,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:01,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125002313] [2024-06-27 19:07:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:01,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:01,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 268 transitions, 3567 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:01,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:01,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:01,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:04,754 INFO L124 PetriNetUnfolderBase]: 5858/9073 cut-off events. [2024-06-27 19:07:04,754 INFO L125 PetriNetUnfolderBase]: For 182977/182979 co-relation queries the response was YES. [2024-06-27 19:07:04,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50383 conditions, 9073 events. 5858/9073 cut-off events. For 182977/182979 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 54233 event pairs, 2386 based on Foata normal form. 4/9071 useless extension candidates. Maximal degree in co-relation 50267. Up to 8300 conditions per place. [2024-06-27 19:07:04,857 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 251 selfloop transitions, 43 changer transitions 0/300 dead transitions. [2024-06-27 19:07:04,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 300 transitions, 4223 flow [2024-06-27 19:07:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:07:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:07:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 19:07:04,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40711462450592883 [2024-06-27 19:07:04,859 INFO L175 Difference]: Start difference. First operand has 239 places, 268 transitions, 3567 flow. Second operand 11 states and 206 transitions. [2024-06-27 19:07:04,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 300 transitions, 4223 flow [2024-06-27 19:07:05,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 300 transitions, 4011 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 19:07:05,353 INFO L231 Difference]: Finished difference. Result has 242 places, 268 transitions, 3447 flow [2024-06-27 19:07:05,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3447, PETRI_PLACES=242, PETRI_TRANSITIONS=268} [2024-06-27 19:07:05,353 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-06-27 19:07:05,353 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 268 transitions, 3447 flow [2024-06-27 19:07:05,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:05,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:05,354 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 19:07:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:07:05,354 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 19:07:05,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1490859545, now seen corresponding path program 12 times [2024-06-27 19:07:05,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540157637] [2024-06-27 19:07:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:09,037 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 19:07:09,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:09,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540157637] [2024-06-27 19:07:09,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540157637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:09,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:09,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:09,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073359174] [2024-06-27 19:07:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:09,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:09,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:09,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:09,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 268 transitions, 3447 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:09,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:09,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:09,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:11,685 INFO L124 PetriNetUnfolderBase]: 5890/9129 cut-off events. [2024-06-27 19:07:11,686 INFO L125 PetriNetUnfolderBase]: For 185972/185974 co-relation queries the response was YES. [2024-06-27 19:07:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 9129 events. 5890/9129 cut-off events. For 185972/185974 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54677 event pairs, 2229 based on Foata normal form. 4/9127 useless extension candidates. Maximal degree in co-relation 50111. Up to 7816 conditions per place. [2024-06-27 19:07:11,788 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 205 selfloop transitions, 97 changer transitions 0/308 dead transitions. [2024-06-27 19:07:11,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 308 transitions, 4304 flow [2024-06-27 19:07:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:07:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:07:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-27 19:07:11,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41847826086956524 [2024-06-27 19:07:11,789 INFO L175 Difference]: Start difference. First operand has 242 places, 268 transitions, 3447 flow. Second operand 12 states and 231 transitions. [2024-06-27 19:07:11,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 308 transitions, 4304 flow [2024-06-27 19:07:12,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 308 transitions, 4183 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 19:07:12,307 INFO L231 Difference]: Finished difference. Result has 243 places, 271 transitions, 3593 flow [2024-06-27 19:07:12,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3593, PETRI_PLACES=243, PETRI_TRANSITIONS=271} [2024-06-27 19:07:12,307 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 193 predicate places. [2024-06-27 19:07:12,308 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 271 transitions, 3593 flow [2024-06-27 19:07:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:12,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:12,308 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 19:07:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:07:12,308 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 19:07:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1779639339, now seen corresponding path program 13 times [2024-06-27 19:07:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964370700] [2024-06-27 19:07:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:15,850 INFO 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 19:07:15,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:15,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964370700] [2024-06-27 19:07:15,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964370700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:15,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:15,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316540385] [2024-06-27 19:07:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:15,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:15,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:15,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 271 transitions, 3593 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:15,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:15,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:15,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:18,207 INFO L124 PetriNetUnfolderBase]: 5878/9113 cut-off events. [2024-06-27 19:07:18,208 INFO L125 PetriNetUnfolderBase]: For 184842/184844 co-relation queries the response was YES. [2024-06-27 19:07:18,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50274 conditions, 9113 events. 5878/9113 cut-off events. For 184842/184844 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 54485 event pairs, 2253 based on Foata normal form. 4/9111 useless extension candidates. Maximal degree in co-relation 50158. Up to 7808 conditions per place. [2024-06-27 19:07:18,310 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 203 selfloop transitions, 95 changer transitions 0/304 dead transitions. [2024-06-27 19:07:18,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 304 transitions, 4259 flow [2024-06-27 19:07:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:07:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:07:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 19:07:18,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209486166007905 [2024-06-27 19:07:18,312 INFO L175 Difference]: Start difference. First operand has 243 places, 271 transitions, 3593 flow. Second operand 11 states and 213 transitions. [2024-06-27 19:07:18,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 304 transitions, 4259 flow [2024-06-27 19:07:18,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 304 transitions, 3901 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-27 19:07:18,799 INFO L231 Difference]: Finished difference. Result has 244 places, 271 transitions, 3431 flow [2024-06-27 19:07:18,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3431, PETRI_PLACES=244, PETRI_TRANSITIONS=271} [2024-06-27 19:07:18,800 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-27 19:07:18,800 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 271 transitions, 3431 flow [2024-06-27 19:07:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:18,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:18,801 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, 1] [2024-06-27 19:07:18,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:07:18,801 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 19:07:18,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 328118074, now seen corresponding path program 1 times [2024-06-27 19:07:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:18,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331243168] [2024-06-27 19:07:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:21,466 INFO 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 19:07:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331243168] [2024-06-27 19:07:21,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331243168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:21,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:21,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368719092] [2024-06-27 19:07:21,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:21,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:21,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:21,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:21,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 3431 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:21,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:21,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:21,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:24,257 INFO L124 PetriNetUnfolderBase]: 6429/9906 cut-off events. [2024-06-27 19:07:24,258 INFO L125 PetriNetUnfolderBase]: For 230175/230177 co-relation queries the response was YES. [2024-06-27 19:07:24,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55322 conditions, 9906 events. 6429/9906 cut-off events. For 230175/230177 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60537 event pairs, 1403 based on Foata normal form. 8/9908 useless extension candidates. Maximal degree in co-relation 55206. Up to 7281 conditions per place. [2024-06-27 19:07:24,364 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 264 selfloop transitions, 67 changer transitions 0/337 dead transitions. [2024-06-27 19:07:24,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 337 transitions, 4749 flow [2024-06-27 19:07:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:07:24,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271739130434783 [2024-06-27 19:07:24,366 INFO L175 Difference]: Start difference. First operand has 244 places, 271 transitions, 3431 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:07:24,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 337 transitions, 4749 flow [2024-06-27 19:07:24,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 337 transitions, 4495 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 19:07:24,898 INFO L231 Difference]: Finished difference. Result has 242 places, 275 transitions, 3401 flow [2024-06-27 19:07:24,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3401, PETRI_PLACES=242, PETRI_TRANSITIONS=275} [2024-06-27 19:07:24,898 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-06-27 19:07:24,899 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 275 transitions, 3401 flow [2024-06-27 19:07:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:24,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:24,899 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, 1] [2024-06-27 19:07:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:07:24,899 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 19:07:24,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1192119268, now seen corresponding path program 2 times [2024-06-27 19:07:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:24,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748265777] [2024-06-27 19:07:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:28,939 INFO 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 19:07:28,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748265777] [2024-06-27 19:07:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748265777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:28,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:28,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:07:28,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735962028] [2024-06-27 19:07:28,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:28,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:07:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:07:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:07:28,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:28,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 275 transitions, 3401 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 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 19:07:28,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:28,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:28,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:31,682 INFO L124 PetriNetUnfolderBase]: 6565/10214 cut-off events. [2024-06-27 19:07:31,682 INFO L125 PetriNetUnfolderBase]: For 241935/241937 co-relation queries the response was YES. [2024-06-27 19:07:31,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57293 conditions, 10214 events. 6565/10214 cut-off events. For 241935/241937 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63120 event pairs, 2420 based on Foata normal form. 8/10216 useless extension candidates. Maximal degree in co-relation 57175. Up to 9222 conditions per place. [2024-06-27 19:07:31,794 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 287 selfloop transitions, 23 changer transitions 0/316 dead transitions. [2024-06-27 19:07:31,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 316 transitions, 4251 flow [2024-06-27 19:07:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 19:07:31,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484472049689441 [2024-06-27 19:07:31,795 INFO L175 Difference]: Start difference. First operand has 242 places, 275 transitions, 3401 flow. Second operand 7 states and 156 transitions. [2024-06-27 19:07:31,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 316 transitions, 4251 flow [2024-06-27 19:07:32,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 316 transitions, 4177 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:07:32,396 INFO L231 Difference]: Finished difference. Result has 246 places, 276 transitions, 3398 flow [2024-06-27 19:07:32,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3398, PETRI_PLACES=246, PETRI_TRANSITIONS=276} [2024-06-27 19:07:32,397 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-06-27 19:07:32,397 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 276 transitions, 3398 flow [2024-06-27 19:07:32,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 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 19:07:32,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:32,397 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, 1] [2024-06-27 19:07:32,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:07:32,398 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 19:07:32,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1213959012, now seen corresponding path program 3 times [2024-06-27 19:07:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438300052] [2024-06-27 19:07:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:35,418 INFO 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 19:07:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438300052] [2024-06-27 19:07:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438300052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:35,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683998751] [2024-06-27 19:07:35,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:35,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:35,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:35,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:35,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 276 transitions, 3398 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:35,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:35,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:35,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:38,235 INFO L124 PetriNetUnfolderBase]: 6739/10494 cut-off events. [2024-06-27 19:07:38,236 INFO L125 PetriNetUnfolderBase]: For 251790/251792 co-relation queries the response was YES. [2024-06-27 19:07:38,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58752 conditions, 10494 events. 6739/10494 cut-off events. For 251790/251792 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 65287 event pairs, 2108 based on Foata normal form. 10/10498 useless extension candidates. Maximal degree in co-relation 58632. Up to 8299 conditions per place. [2024-06-27 19:07:38,360 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 254 selfloop transitions, 64 changer transitions 0/324 dead transitions. [2024-06-27 19:07:38,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 4461 flow [2024-06-27 19:07:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:07:38,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:07:38,361 INFO L175 Difference]: Start difference. First operand has 246 places, 276 transitions, 3398 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:07:38,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 4461 flow [2024-06-27 19:07:39,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 324 transitions, 4415 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:07:39,068 INFO L231 Difference]: Finished difference. Result has 249 places, 278 transitions, 3572 flow [2024-06-27 19:07:39,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3572, PETRI_PLACES=249, PETRI_TRANSITIONS=278} [2024-06-27 19:07:39,068 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 199 predicate places. [2024-06-27 19:07:39,068 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 278 transitions, 3572 flow [2024-06-27 19:07:39,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:39,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:39,069 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, 1] [2024-06-27 19:07:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:07:39,069 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 19:07:39,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1048651210, now seen corresponding path program 4 times [2024-06-27 19:07:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303118131] [2024-06-27 19:07:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:41,885 INFO 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 19:07:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:41,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303118131] [2024-06-27 19:07:41,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303118131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:41,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:41,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11440867] [2024-06-27 19:07:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:41,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:41,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:41,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:41,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 278 transitions, 3572 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:41,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:41,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:41,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:44,778 INFO L124 PetriNetUnfolderBase]: 6752/10547 cut-off events. [2024-06-27 19:07:44,779 INFO L125 PetriNetUnfolderBase]: For 248091/248093 co-relation queries the response was YES. [2024-06-27 19:07:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59466 conditions, 10547 events. 6752/10547 cut-off events. For 248091/248093 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 66000 event pairs, 2602 based on Foata normal form. 10/10551 useless extension candidates. Maximal degree in co-relation 59344. Up to 9307 conditions per place. [2024-06-27 19:07:44,901 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 253 selfloop transitions, 51 changer transitions 0/310 dead transitions. [2024-06-27 19:07:44,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 310 transitions, 4344 flow [2024-06-27 19:07:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 19:07:44,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813664596273292 [2024-06-27 19:07:44,903 INFO L175 Difference]: Start difference. First operand has 249 places, 278 transitions, 3572 flow. Second operand 7 states and 155 transitions. [2024-06-27 19:07:44,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 310 transitions, 4344 flow [2024-06-27 19:07:45,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 310 transitions, 4170 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:07:45,760 INFO L231 Difference]: Finished difference. Result has 249 places, 279 transitions, 3534 flow [2024-06-27 19:07:45,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3534, PETRI_PLACES=249, PETRI_TRANSITIONS=279} [2024-06-27 19:07:45,761 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 199 predicate places. [2024-06-27 19:07:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 279 transitions, 3534 flow [2024-06-27 19:07:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:45,761 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, 1] [2024-06-27 19:07:45,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:07:45,761 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 19:07:45,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 618602652, now seen corresponding path program 5 times [2024-06-27 19:07:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203515233] [2024-06-27 19:07:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:49,012 INFO 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 19:07:49,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:49,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203515233] [2024-06-27 19:07:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203515233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:49,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:49,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618203206] [2024-06-27 19:07:49,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:49,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:49,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:49,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 279 transitions, 3534 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:49,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:49,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:49,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:51,785 INFO L124 PetriNetUnfolderBase]: 6734/10515 cut-off events. [2024-06-27 19:07:51,786 INFO L125 PetriNetUnfolderBase]: For 225624/225626 co-relation queries the response was YES. [2024-06-27 19:07:51,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58094 conditions, 10515 events. 6734/10515 cut-off events. For 225624/225626 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 65871 event pairs, 2804 based on Foata normal form. 8/10517 useless extension candidates. Maximal degree in co-relation 57973. Up to 9381 conditions per place. [2024-06-27 19:07:51,913 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 272 selfloop transitions, 39 changer transitions 0/317 dead transitions. [2024-06-27 19:07:51,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 317 transitions, 4402 flow [2024-06-27 19:07:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 19:07:51,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592391304347826 [2024-06-27 19:07:51,914 INFO L175 Difference]: Start difference. First operand has 249 places, 279 transitions, 3534 flow. Second operand 8 states and 169 transitions. [2024-06-27 19:07:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 317 transitions, 4402 flow [2024-06-27 19:07:52,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 317 transitions, 4305 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:07:52,613 INFO L231 Difference]: Finished difference. Result has 253 places, 284 transitions, 3653 flow [2024-06-27 19:07:52,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3653, PETRI_PLACES=253, PETRI_TRANSITIONS=284} [2024-06-27 19:07:52,613 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 203 predicate places. [2024-06-27 19:07:52,613 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 284 transitions, 3653 flow [2024-06-27 19:07:52,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:52,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:52,614 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, 1] [2024-06-27 19:07:52,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:07:52,614 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 19:07:52,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -564647978, now seen corresponding path program 6 times [2024-06-27 19:07:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:52,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807585833] [2024-06-27 19:07:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:56,146 INFO 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 19:07:56,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807585833] [2024-06-27 19:07:56,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807585833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:56,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:56,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:56,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043647362] [2024-06-27 19:07:56,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:56,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:56,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:56,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:56,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:56,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:07:56,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 284 transitions, 3653 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:56,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:56,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:07:56,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:59,058 INFO L124 PetriNetUnfolderBase]: 7039/11016 cut-off events. [2024-06-27 19:07:59,058 INFO L125 PetriNetUnfolderBase]: For 254312/254314 co-relation queries the response was YES. [2024-06-27 19:07:59,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61679 conditions, 11016 events. 7039/11016 cut-off events. For 254312/254314 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 69764 event pairs, 2653 based on Foata normal form. 10/11020 useless extension candidates. Maximal degree in co-relation 61556. Up to 9105 conditions per place. [2024-06-27 19:07:59,199 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 272 selfloop transitions, 61 changer transitions 0/339 dead transitions. [2024-06-27 19:07:59,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 339 transitions, 4767 flow [2024-06-27 19:07:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:07:59,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027173913043478 [2024-06-27 19:07:59,200 INFO L175 Difference]: Start difference. First operand has 253 places, 284 transitions, 3653 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:07:59,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 339 transitions, 4767 flow [2024-06-27 19:07:59,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 339 transitions, 4686 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:07:59,965 INFO L231 Difference]: Finished difference. Result has 258 places, 287 transitions, 3776 flow [2024-06-27 19:07:59,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3776, PETRI_PLACES=258, PETRI_TRANSITIONS=287} [2024-06-27 19:07:59,966 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-06-27 19:07:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 287 transitions, 3776 flow [2024-06-27 19:07:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:07:59,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:59,967 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, 1] [2024-06-27 19:07:59,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:07:59,967 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 19:07:59,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash -564381068, now seen corresponding path program 7 times [2024-06-27 19:07:59,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:59,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855859023] [2024-06-27 19:07:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:59,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:03,544 INFO 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 19:08:03,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:03,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855859023] [2024-06-27 19:08:03,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855859023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:03,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:03,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437736397] [2024-06-27 19:08:03,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:03,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:03,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:03,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 287 transitions, 3776 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:08:03,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:03,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:03,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:06,541 INFO L124 PetriNetUnfolderBase]: 7213/11290 cut-off events. [2024-06-27 19:08:06,541 INFO L125 PetriNetUnfolderBase]: For 268245/268247 co-relation queries the response was YES. [2024-06-27 19:08:06,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64142 conditions, 11290 events. 7213/11290 cut-off events. For 268245/268247 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 71822 event pairs, 2806 based on Foata normal form. 10/11294 useless extension candidates. Maximal degree in co-relation 64016. Up to 9950 conditions per place. [2024-06-27 19:08:06,681 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 261 selfloop transitions, 59 changer transitions 0/326 dead transitions. [2024-06-27 19:08:06,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 326 transitions, 4596 flow [2024-06-27 19:08:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 19:08:06,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2024-06-27 19:08:06,683 INFO L175 Difference]: Start difference. First operand has 258 places, 287 transitions, 3776 flow. Second operand 8 states and 172 transitions. [2024-06-27 19:08:06,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 326 transitions, 4596 flow [2024-06-27 19:08:07,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 326 transitions, 4494 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:07,506 INFO L231 Difference]: Finished difference. Result has 262 places, 288 transitions, 3818 flow [2024-06-27 19:08:07,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3818, PETRI_PLACES=262, PETRI_TRANSITIONS=288} [2024-06-27 19:08:07,507 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 212 predicate places. [2024-06-27 19:08:07,507 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 288 transitions, 3818 flow [2024-06-27 19:08:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:08:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:07,507 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, 1] [2024-06-27 19:08:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:08:07,508 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 19:08:07,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1107072838, now seen corresponding path program 8 times [2024-06-27 19:08:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403539954] [2024-06-27 19:08:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:07,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:11,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403539954] [2024-06-27 19:08:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403539954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:11,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647578900] [2024-06-27 19:08:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:11,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:11,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:11,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 288 transitions, 3818 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:08:11,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:11,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:11,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:14,498 INFO L124 PetriNetUnfolderBase]: 7387/11564 cut-off events. [2024-06-27 19:08:14,499 INFO L125 PetriNetUnfolderBase]: For 274046/274048 co-relation queries the response was YES. [2024-06-27 19:08:14,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65674 conditions, 11564 events. 7387/11564 cut-off events. For 274046/274048 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73846 event pairs, 2858 based on Foata normal form. 10/11568 useless extension candidates. Maximal degree in co-relation 65546. Up to 10204 conditions per place. [2024-06-27 19:08:14,640 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 258 selfloop transitions, 59 changer transitions 0/323 dead transitions. [2024-06-27 19:08:14,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 323 transitions, 4620 flow [2024-06-27 19:08:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 19:08:14,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592391304347826 [2024-06-27 19:08:14,642 INFO L175 Difference]: Start difference. First operand has 262 places, 288 transitions, 3818 flow. Second operand 8 states and 169 transitions. [2024-06-27 19:08:14,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 323 transitions, 4620 flow [2024-06-27 19:08:15,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 323 transitions, 4503 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:15,376 INFO L231 Difference]: Finished difference. Result has 264 places, 289 transitions, 3843 flow [2024-06-27 19:08:15,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=264, PETRI_TRANSITIONS=289} [2024-06-27 19:08:15,377 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-06-27 19:08:15,377 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 289 transitions, 3843 flow [2024-06-27 19:08:15,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:08:15,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:15,378 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, 1] [2024-06-27 19:08:15,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:08:15,378 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 19:08:15,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash 749035188, now seen corresponding path program 9 times [2024-06-27 19:08:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:15,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362274194] [2024-06-27 19:08:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:15,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:19,417 INFO 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 19:08:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362274194] [2024-06-27 19:08:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362274194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:19,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020711612] [2024-06-27 19:08:19,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:19,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:19,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:19,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 289 transitions, 3843 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:08:19,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:19,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:19,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:22,424 INFO L124 PetriNetUnfolderBase]: 7364/11531 cut-off events. [2024-06-27 19:08:22,424 INFO L125 PetriNetUnfolderBase]: For 260402/260404 co-relation queries the response was YES. [2024-06-27 19:08:22,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65004 conditions, 11531 events. 7364/11531 cut-off events. For 260402/260404 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73795 event pairs, 3156 based on Foata normal form. 10/11535 useless extension candidates. Maximal degree in co-relation 64875. Up to 10456 conditions per place. [2024-06-27 19:08:22,555 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 276 selfloop transitions, 36 changer transitions 0/318 dead transitions. [2024-06-27 19:08:22,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 318 transitions, 4623 flow [2024-06-27 19:08:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:08:22,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:08:22,557 INFO L175 Difference]: Start difference. First operand has 264 places, 289 transitions, 3843 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:08:22,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 318 transitions, 4623 flow [2024-06-27 19:08:23,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 318 transitions, 4500 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:23,374 INFO L231 Difference]: Finished difference. Result has 266 places, 291 transitions, 3859 flow [2024-06-27 19:08:23,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3859, PETRI_PLACES=266, PETRI_TRANSITIONS=291} [2024-06-27 19:08:23,375 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 216 predicate places. [2024-06-27 19:08:23,375 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 291 transitions, 3859 flow [2024-06-27 19:08:23,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 19:08:23,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:23,375 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, 1] [2024-06-27 19:08:23,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:08:23,375 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 19:08:23,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash 769953782, now seen corresponding path program 1 times [2024-06-27 19:08:23,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:23,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840298197] [2024-06-27 19:08:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:23,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:27,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:27,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840298197] [2024-06-27 19:08:27,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840298197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:27,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:27,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:08:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191870505] [2024-06-27 19:08:27,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:27,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:08:27,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:27,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:08:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:08:27,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:27,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 291 transitions, 3859 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:27,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:27,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:27,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:31,725 INFO L124 PetriNetUnfolderBase]: 9989/15681 cut-off events. [2024-06-27 19:08:31,726 INFO L125 PetriNetUnfolderBase]: For 324366/324386 co-relation queries the response was YES. [2024-06-27 19:08:31,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90343 conditions, 15681 events. 9989/15681 cut-off events. For 324366/324386 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 105618 event pairs, 3484 based on Foata normal form. 20/15697 useless extension candidates. Maximal degree in co-relation 90213. Up to 11248 conditions per place. [2024-06-27 19:08:31,920 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 340 selfloop transitions, 140 changer transitions 0/486 dead transitions. [2024-06-27 19:08:31,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 486 transitions, 7258 flow [2024-06-27 19:08:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-27 19:08:31,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:08:31,922 INFO L175 Difference]: Start difference. First operand has 266 places, 291 transitions, 3859 flow. Second operand 10 states and 240 transitions. [2024-06-27 19:08:31,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 486 transitions, 7258 flow [2024-06-27 19:08:33,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 486 transitions, 7068 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:33,193 INFO L231 Difference]: Finished difference. Result has 274 places, 379 transitions, 5593 flow [2024-06-27 19:08:33,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5593, PETRI_PLACES=274, PETRI_TRANSITIONS=379} [2024-06-27 19:08:33,194 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 224 predicate places. [2024-06-27 19:08:33,194 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 379 transitions, 5593 flow [2024-06-27 19:08:33,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:33,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:33,195 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, 1] [2024-06-27 19:08:33,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:08:33,195 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 19:08:33,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:33,195 INFO L85 PathProgramCache]: Analyzing trace with hash 261105615, now seen corresponding path program 1 times [2024-06-27 19:08:33,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:33,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550891036] [2024-06-27 19:08:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:33,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:36,883 INFO 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 19:08:36,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:36,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550891036] [2024-06-27 19:08:36,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550891036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:36,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:36,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:08:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155054214] [2024-06-27 19:08:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:08:36,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:08:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:08:36,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:36,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 379 transitions, 5593 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:36,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:36,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:36,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:41,558 INFO L124 PetriNetUnfolderBase]: 10529/16490 cut-off events. [2024-06-27 19:08:41,558 INFO L125 PetriNetUnfolderBase]: For 374270/374282 co-relation queries the response was YES. [2024-06-27 19:08:41,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98893 conditions, 16490 events. 10529/16490 cut-off events. For 374270/374282 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 111399 event pairs, 3403 based on Foata normal form. 16/16500 useless extension candidates. Maximal degree in co-relation 98758. Up to 12799 conditions per place. [2024-06-27 19:08:41,841 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 345 selfloop transitions, 108 changer transitions 0/459 dead transitions. [2024-06-27 19:08:41,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 459 transitions, 7209 flow [2024-06-27 19:08:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:08:41,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48043478260869565 [2024-06-27 19:08:41,843 INFO L175 Difference]: Start difference. First operand has 274 places, 379 transitions, 5593 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:08:41,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 459 transitions, 7209 flow [2024-06-27 19:08:43,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 459 transitions, 7105 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:08:43,328 INFO L231 Difference]: Finished difference. Result has 281 places, 389 transitions, 5952 flow [2024-06-27 19:08:43,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5952, PETRI_PLACES=281, PETRI_TRANSITIONS=389} [2024-06-27 19:08:43,329 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 231 predicate places. [2024-06-27 19:08:43,329 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 389 transitions, 5952 flow [2024-06-27 19:08:43,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:43,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:43,329 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, 1] [2024-06-27 19:08:43,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:08:43,330 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 19:08:43,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash -394474408, now seen corresponding path program 2 times [2024-06-27 19:08:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914790675] [2024-06-27 19:08:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:47,918 INFO 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 19:08:47,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:47,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914790675] [2024-06-27 19:08:47,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914790675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:47,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:47,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:08:47,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806851705] [2024-06-27 19:08:47,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:47,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:08:47,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:08:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:08:47,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:47,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 389 transitions, 5952 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:47,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:47,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:47,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:53,004 INFO L124 PetriNetUnfolderBase]: 10836/17024 cut-off events. [2024-06-27 19:08:53,004 INFO L125 PetriNetUnfolderBase]: For 410331/410335 co-relation queries the response was YES. [2024-06-27 19:08:53,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104285 conditions, 17024 events. 10836/17024 cut-off events. For 410331/410335 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 115733 event pairs, 3073 based on Foata normal form. 13/17026 useless extension candidates. Maximal degree in co-relation 104149. Up to 9180 conditions per place. [2024-06-27 19:08:53,208 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 277 selfloop transitions, 168 changer transitions 0/451 dead transitions. [2024-06-27 19:08:53,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 451 transitions, 7544 flow [2024-06-27 19:08:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:08:53,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163043478260869 [2024-06-27 19:08:53,209 INFO L175 Difference]: Start difference. First operand has 281 places, 389 transitions, 5952 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:08:53,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 451 transitions, 7544 flow [2024-06-27 19:08:54,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 451 transitions, 7423 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:54,978 INFO L231 Difference]: Finished difference. Result has 283 places, 392 transitions, 6231 flow [2024-06-27 19:08:54,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6231, PETRI_PLACES=283, PETRI_TRANSITIONS=392} [2024-06-27 19:08:54,979 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-06-27 19:08:54,979 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 392 transitions, 6231 flow [2024-06-27 19:08:54,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:54,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:54,979 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, 1] [2024-06-27 19:08:54,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:08:54,980 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 19:08:54,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1020569539, now seen corresponding path program 2 times [2024-06-27 19:08:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:54,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928082302] [2024-06-27 19:08:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:59,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928082302] [2024-06-27 19:08:59,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928082302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:59,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:59,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:08:59,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850914834] [2024-06-27 19:08:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:59,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:08:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:08:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:08:59,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:08:59,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 392 transitions, 6231 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:08:59,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:59,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:08:59,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:05,333 INFO L124 PetriNetUnfolderBase]: 11048/17373 cut-off events. [2024-06-27 19:09:05,333 INFO L125 PetriNetUnfolderBase]: For 434931/434943 co-relation queries the response was YES. [2024-06-27 19:09:05,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108594 conditions, 17373 events. 11048/17373 cut-off events. For 434931/434943 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 119180 event pairs, 4186 based on Foata normal form. 20/17387 useless extension candidates. Maximal degree in co-relation 108457. Up to 15110 conditions per place. [2024-06-27 19:09:05,665 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 352 selfloop transitions, 84 changer transitions 0/442 dead transitions. [2024-06-27 19:09:05,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 442 transitions, 7340 flow [2024-06-27 19:09:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:09:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:09:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:09:05,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44565217391304346 [2024-06-27 19:09:05,666 INFO L175 Difference]: Start difference. First operand has 283 places, 392 transitions, 6231 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:09:05,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 442 transitions, 7340 flow [2024-06-27 19:09:07,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 442 transitions, 7007 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:09:07,256 INFO L231 Difference]: Finished difference. Result has 285 places, 393 transitions, 6093 flow [2024-06-27 19:09:07,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6093, PETRI_PLACES=285, PETRI_TRANSITIONS=393} [2024-06-27 19:09:07,257 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-06-27 19:09:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 393 transitions, 6093 flow [2024-06-27 19:09:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:09:07,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:07,257 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, 1] [2024-06-27 19:09:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:09:07,257 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 19:09:07,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash -392600117, now seen corresponding path program 3 times [2024-06-27 19:09:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:07,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369925733] [2024-06-27 19:09:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:11,544 INFO 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 19:09:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369925733] [2024-06-27 19:09:11,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369925733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:11,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:11,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:09:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967262598] [2024-06-27 19:09:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:11,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:09:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:09:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:09:11,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:09:11,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 393 transitions, 6093 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:09:11,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:11,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:09:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:17,373 INFO L124 PetriNetUnfolderBase]: 11184/17543 cut-off events. [2024-06-27 19:09:17,373 INFO L125 PetriNetUnfolderBase]: For 435069/435081 co-relation queries the response was YES. [2024-06-27 19:09:17,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107946 conditions, 17543 events. 11184/17543 cut-off events. For 435069/435081 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 120218 event pairs, 4062 based on Foata normal form. 16/17553 useless extension candidates. Maximal degree in co-relation 107812. Up to 14906 conditions per place. [2024-06-27 19:09:17,591 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 357 selfloop transitions, 92 changer transitions 0/455 dead transitions. [2024-06-27 19:09:17,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 455 transitions, 7326 flow [2024-06-27 19:09:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:09:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:09:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:09:17,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525691699604743 [2024-06-27 19:09:17,593 INFO L175 Difference]: Start difference. First operand has 285 places, 393 transitions, 6093 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:09:17,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 455 transitions, 7326 flow [2024-06-27 19:09:19,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 455 transitions, 7160 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:09:19,362 INFO L231 Difference]: Finished difference. Result has 288 places, 395 transitions, 6178 flow [2024-06-27 19:09:19,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6178, PETRI_PLACES=288, PETRI_TRANSITIONS=395} [2024-06-27 19:09:19,362 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 238 predicate places. [2024-06-27 19:09:19,362 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 395 transitions, 6178 flow [2024-06-27 19:09:19,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:09:19,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:19,363 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, 1] [2024-06-27 19:09:19,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:09:19,363 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 19:09:19,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1020565478, now seen corresponding path program 3 times [2024-06-27 19:09:19,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:19,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362755555] [2024-06-27 19:09:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:19,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:23,634 INFO 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 19:09:23,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:23,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362755555] [2024-06-27 19:09:23,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362755555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:23,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:23,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:09:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464313209] [2024-06-27 19:09:23,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:23,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:09:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:09:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:09:23,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 19:09:23,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 395 transitions, 6178 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:09:23,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:23,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 19:09:23,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand