./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe019_power.oepc.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/safe019_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe019_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:20:49,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:20:49,486 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:20:49,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:20:49,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:20:49,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:20:49,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:20:49,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:20:49,518 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:20:49,521 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:20:49,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:20:49,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:20:49,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:20:49,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:20:49,523 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:20:49,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:20:49,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:20:49,524 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:20:49,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:20:49,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:20:49,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:20:49,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:20:49,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:20:49,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:20:49,526 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:20:49,526 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:20:49,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:20:49,526 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:20:49,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:20:49,527 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:20:49,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:20:49,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:20:49,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:20:49,528 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:20:49,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:20:49,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:20:49,529 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:20:49,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:20:49,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:20:49,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:20:49,777 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:20:49,777 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:20:49,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-27 21:20:50,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:20:51,119 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:20:51,129 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-27 21:20:51,144 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf212f4b5/11f9283c408e4d819ef3ffe498ca3d45/FLAG13a993c55 [2024-06-27 21:20:51,156 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf212f4b5/11f9283c408e4d819ef3ffe498ca3d45 [2024-06-27 21:20:51,158 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:20:51,159 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:20:51,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_power.oepc.yml/witness.yml [2024-06-27 21:20:51,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:20:51,389 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:20:51,390 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:20:51,390 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:20:51,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:20:51,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:20:51" (1/2) ... [2024-06-27 21:20:51,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2063afe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:20:51, skipping insertion in model container [2024-06-27 21:20:51,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:20:51" (1/2) ... [2024-06-27 21:20:51,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@589ae82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:20:51, skipping insertion in model container [2024-06-27 21:20:51,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:20:51" (2/2) ... [2024-06-27 21:20:51,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2063afe9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:20:51, skipping insertion in model container [2024-06-27 21:20:51,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:20:51" (2/2) ... [2024-06-27 21:20:51,397 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:20:51,566 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:20:51,567 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:20:51,567 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:20:51,568 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:20:51,568 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:20:51,568 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:20:51,569 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-27 21:20:51,600 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:20:51,918 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:20:51,926 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:20:52,092 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:20:52,141 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:20:52,142 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:20:52 WrapperNode [2024-06-27 21:20:52,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:20:52,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:20:52,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:20:52,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:20:52,149 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,201 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,230 INFO L138 Inliner]: procedures = 176, calls = 96, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 256 [2024-06-27 21:20:52,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:20:52,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:20:52,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:20:52,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:20:52,239 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,250 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,253 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,268 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-27 21:20:52,280 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,281 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,304 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,306 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,308 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,314 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:20:52,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:20:52,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:20:52,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:20:52,321 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 09:20:52" (1/1) ... [2024-06-27 21:20:52,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:20:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:20:52,345 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 21:20:52,378 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 21:20:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:20:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:20:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:20:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:20:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:20:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:20:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:20:52,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:20:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:20:52,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:20:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:20:52,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:20:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:20:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:20:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:20:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:20:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:20:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:20:52,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:20:52,396 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 21:20:52,548 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:20:52,549 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:20:53,024 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:20:53,024 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:20:53,437 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:20:53,438 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:20:53,438 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:20:53 BoogieIcfgContainer [2024-06-27 21:20:53,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:20:53,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:20:53,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:20:53,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:20:53,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:20:51" (1/4) ... [2024-06-27 21:20:53,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efd1acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:20:53, skipping insertion in model container [2024-06-27 21:20:53,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:20:51" (2/4) ... [2024-06-27 21:20:53,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efd1acb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:20:53, skipping insertion in model container [2024-06-27 21:20:53,445 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 09:20:52" (3/4) ... [2024-06-27 21:20:53,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efd1acb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:20:53, skipping insertion in model container [2024-06-27 21:20:53,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:20:53" (4/4) ... [2024-06-27 21:20:53,446 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.oepc.i [2024-06-27 21:20:53,461 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:20:53,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:20:53,461 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:20:53,525 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:20:53,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:20:53,589 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:20:53,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:20:53,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:20:53,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:20:53,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:20:53,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:20:53,669 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;@7db28b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:20:53,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:20:53,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:20:53,676 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:20:53,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:20:53,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:53,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:20:53,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:20:53,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 860775238, now seen corresponding path program 1 times [2024-06-27 21:20:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:53,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365843707] [2024-06-27 21:20:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:55,726 INFO 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 21:20:55,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365843707] [2024-06-27 21:20:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365843707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:55,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:55,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:20:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705915366] [2024-06-27 21:20:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:55,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:20:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:20:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:20:55,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:20:55,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:55,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:55,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:20:55,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:57,135 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-27 21:20:57,135 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 21:20:57,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 6138 events. 4366/6138 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32309 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-27 21:20:57,167 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 21:20:57,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-27 21:20:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:20:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:20:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 21:20:57,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-27 21:20:57,178 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-27 21:20:57,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-27 21:20:57,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:20:57,185 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:20:57,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 21:20:57,189 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:20:57,189 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:20:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:57,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:57,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:57,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:20:57,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:20:57,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1723629659, now seen corresponding path program 1 times [2024-06-27 21:20:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780148318] [2024-06-27 21:20:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:59,574 INFO 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 21:20:59,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:59,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780148318] [2024-06-27 21:20:59,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780148318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:59,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:59,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:20:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439721805] [2024-06-27 21:20:59,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:20:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:20:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:20:59,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:20:59,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:20:59,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:00,940 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-27 21:21:00,941 INFO L125 PetriNetUnfolderBase]: For 1244/1254 co-relation queries the response was YES. [2024-06-27 21:21:00,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1244/1254 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32114 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-27 21:21:00,973 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 21:21:00,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-27 21:21:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:21:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:21:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 21:21:00,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-27 21:21:00,975 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-27 21:21:00,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-27 21:21:00,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:21:00,977 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-27 21:21:00,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 21:21:00,978 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-27 21:21:00,978 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-27 21:21:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:00,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:00,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:00,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:21:00,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:00,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1979580326, now seen corresponding path program 1 times [2024-06-27 21:21:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569190782] [2024-06-27 21:21:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569190782] [2024-06-27 21:21:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569190782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:03,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312277937] [2024-06-27 21:21:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:03,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:04,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:21:04,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:04,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:04,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:21:04,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:05,831 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-27 21:21:05,831 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-27 21:21:05,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39847 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-27 21:21:05,886 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-27 21:21:05,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-27 21:21:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 21:21:05,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-27 21:21:05,891 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-27 21:21:05,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-27 21:21:05,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:05,896 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-27 21:21:05,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 21:21:05,897 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-27 21:21:05,898 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-27 21:21:05,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:05,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:05,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:21:05,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:05,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash -481613908, now seen corresponding path program 1 times [2024-06-27 21:21:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:05,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035517899] [2024-06-27 21:21:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:05,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:07,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:07,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035517899] [2024-06-27 21:21:07,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035517899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:07,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:07,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:07,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042739780] [2024-06-27 21:21:07,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:07,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:07,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:07,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:07,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:07,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:07,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:09,571 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-27 21:21:09,572 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-27 21:21:09,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 9210 events. 6648/9210 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47611 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-27 21:21:09,619 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-27 21:21:09,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-27 21:21:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:21:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:21:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:21:09,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:21:09,621 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:21:09,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-27 21:21:09,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:09,626 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-27 21:21:09,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-27 21:21:09,626 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 21:21:09,626 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-27 21:21:09,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:09,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:09,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:09,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:21:09,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:09,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash -95189707, now seen corresponding path program 1 times [2024-06-27 21:21:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:09,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302025982] [2024-06-27 21:21:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:12,648 INFO 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 21:21:12,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:12,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302025982] [2024-06-27 21:21:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302025982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:12,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:12,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870116685] [2024-06-27 21:21:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:12,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:12,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:12,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:12,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:12,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:14,952 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-27 21:21:14,952 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-27 21:21:14,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 9240 events. 6675/9240 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47568 event pairs, 3168 based on Foata normal form. 3/9237 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-27 21:21:14,995 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-27 21:21:14,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-27 21:21:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:21:14,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:21:15,000 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:21:15,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-27 21:21:15,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 21:21:15,005 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-27 21:21:15,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-27 21:21:15,005 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-27 21:21:15,006 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-27 21:21:15,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:15,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:15,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:15,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:21:15,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:15,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash -73792267, now seen corresponding path program 2 times [2024-06-27 21:21:15,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:15,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447269023] [2024-06-27 21:21:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:15,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:17,561 INFO 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 21:21:17,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:17,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447269023] [2024-06-27 21:21:17,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447269023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:17,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:17,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:17,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045262278] [2024-06-27 21:21:17,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:17,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:17,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:17,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:17,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:17,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:17,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:17,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:17,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:17,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:19,793 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-27 21:21:19,793 INFO L125 PetriNetUnfolderBase]: For 20521/20534 co-relation queries the response was YES. [2024-06-27 21:21:19,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20521/20534 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47733 event pairs, 3175 based on Foata normal form. 13/9246 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-27 21:21:19,843 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 21:21:19,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-27 21:21:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 21:21:19,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:21:19,847 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-27 21:21:19,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-27 21:21:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:19,868 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-27 21:21:19,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 21:21:19,869 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 21:21:19,869 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-27 21:21:19,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:19,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:19,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:19,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:21:19,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:19,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:19,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1662780157, now seen corresponding path program 1 times [2024-06-27 21:21:19,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:19,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095998084] [2024-06-27 21:21:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:19,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:21,754 INFO 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 21:21:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095998084] [2024-06-27 21:21:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095998084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:21,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:21,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830336319] [2024-06-27 21:21:21,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:21,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:21,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:21,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:21,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:21,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:21,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:21,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:23,863 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-27 21:21:23,864 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-27 21:21:23,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 9214 events. 6651/9214 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47643 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-27 21:21:23,912 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-27 21:21:23,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-27 21:21:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 21:21:23,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:21:23,914 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-27 21:21:23,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-27 21:21:23,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:23,935 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-27 21:21:23,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-27 21:21:23,936 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 21:21:23,937 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-27 21:21:23,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:23,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:23,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:23,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:21:23,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:23,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1549918741, now seen corresponding path program 1 times [2024-06-27 21:21:23,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:23,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245397205] [2024-06-27 21:21:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:27,132 INFO 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 21:21:27,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245397205] [2024-06-27 21:21:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245397205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:27,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:27,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:27,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347768875] [2024-06-27 21:21:27,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:27,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:27,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:27,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:27,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:27,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 454 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 21:21:27,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:29,542 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-27 21:21:29,542 INFO L125 PetriNetUnfolderBase]: For 30778/30781 co-relation queries the response was YES. [2024-06-27 21:21:29,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33868 conditions, 9305 events. 6697/9305 cut-off events. For 30778/30781 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48690 event pairs, 2838 based on Foata normal form. 7/9308 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-27 21:21:29,607 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-27 21:21:29,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-27 21:21:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:21:29,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:21:29,609 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:21:29,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-27 21:21:29,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:29,633 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-27 21:21:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-27 21:21:29,634 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-27 21:21:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-27 21:21:29,635 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 21:21:29,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:29,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:29,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:21:29,635 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:29,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1549923391, now seen corresponding path program 2 times [2024-06-27 21:21:29,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:29,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035395646] [2024-06-27 21:21:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:29,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:32,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:32,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035395646] [2024-06-27 21:21:32,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035395646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:32,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:32,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:32,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839887253] [2024-06-27 21:21:32,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:32,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:32,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:32,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:32,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 526 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 21:21:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:32,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:35,328 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-27 21:21:35,330 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-27 21:21:35,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36900 conditions, 9332 events. 6724/9332 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48256 event pairs, 2984 based on Foata normal form. 3/9329 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-27 21:21:35,378 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-27 21:21:35,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-27 21:21:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 21:21:35,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:21:35,381 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-27 21:21:35,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-27 21:21:35,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:35,405 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-27 21:21:35,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-27 21:21:35,406 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-27 21:21:35,406 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-27 21:21:35,406 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 21:21:35,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:35,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:21:35,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:35,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 671267741, now seen corresponding path program 3 times [2024-06-27 21:21:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605484974] [2024-06-27 21:21:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:38,275 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 21:21:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605484974] [2024-06-27 21:21:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605484974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:38,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:38,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:38,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816313392] [2024-06-27 21:21:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:38,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:38,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:38,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:38,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 682 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 21:21:38,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:38,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:38,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:40,831 INFO L124 PetriNetUnfolderBase]: 6715/9323 cut-off events. [2024-06-27 21:21:40,831 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-27 21:21:40,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 9323 events. 6715/9323 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48135 event pairs, 3001 based on Foata normal form. 3/9318 useless extension candidates. Maximal degree in co-relation 39364. Up to 9050 conditions per place. [2024-06-27 21:21:40,876 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-27 21:21:40,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-27 21:21:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 21:21:40,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:21:40,879 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-27 21:21:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-27 21:21:40,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:40,909 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-27 21:21:40,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-27 21:21:40,910 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-27 21:21:40,910 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-27 21:21:40,910 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 21:21:40,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:40,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:40,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:21:40,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:40,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash 980604172, now seen corresponding path program 1 times [2024-06-27 21:21:40,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:40,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021130247] [2024-06-27 21:21:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:40,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:43,216 INFO 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 21:21:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021130247] [2024-06-27 21:21:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021130247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:43,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:43,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558254062] [2024-06-27 21:21:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:43,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:43,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 710 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 21:21:43,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:43,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:43,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:46,301 INFO L124 PetriNetUnfolderBase]: 7048/9790 cut-off events. [2024-06-27 21:21:46,301 INFO L125 PetriNetUnfolderBase]: For 59156/59156 co-relation queries the response was YES. [2024-06-27 21:21:46,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42373 conditions, 9790 events. 7048/9790 cut-off events. For 59156/59156 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50664 event pairs, 3004 based on Foata normal form. 18/9802 useless extension candidates. Maximal degree in co-relation 42340. Up to 9382 conditions per place. [2024-06-27 21:21:46,358 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 140 selfloop transitions, 54 changer transitions 0/200 dead transitions. [2024-06-27 21:21:46,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 200 transitions, 1616 flow [2024-06-27 21:21:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:21:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:21:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 21:21:46,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:21:46,360 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 11 states and 253 transitions. [2024-06-27 21:21:46,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 200 transitions, 1616 flow [2024-06-27 21:21:46,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 200 transitions, 1530 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:46,409 INFO L231 Difference]: Finished difference. Result has 99 places, 135 transitions, 1112 flow [2024-06-27 21:21:46,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1112, PETRI_PLACES=99, PETRI_TRANSITIONS=135} [2024-06-27 21:21:46,410 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 21:21:46,410 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 135 transitions, 1112 flow [2024-06-27 21:21:46,410 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 21:21:46,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:46,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:46,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:21:46,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:46,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1282946924, now seen corresponding path program 2 times [2024-06-27 21:21:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:46,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467522450] [2024-06-27 21:21:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:46,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:49,419 INFO 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 21:21:49,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:49,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467522450] [2024-06-27 21:21:49,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467522450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:49,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:49,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:49,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615931543] [2024-06-27 21:21:49,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:49,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:49,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:49,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:49,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 135 transitions, 1112 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 21:21:49,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:49,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:49,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:52,055 INFO L124 PetriNetUnfolderBase]: 7092/9854 cut-off events. [2024-06-27 21:21:52,055 INFO L125 PetriNetUnfolderBase]: For 80119/80119 co-relation queries the response was YES. [2024-06-27 21:21:52,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46855 conditions, 9854 events. 7092/9854 cut-off events. For 80119/80119 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51213 event pairs, 2964 based on Foata normal form. 6/9854 useless extension candidates. Maximal degree in co-relation 46816. Up to 9521 conditions per place. [2024-06-27 21:21:52,126 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 138 selfloop transitions, 42 changer transitions 0/186 dead transitions. [2024-06-27 21:21:52,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 186 transitions, 1670 flow [2024-06-27 21:21:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 21:21:52,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-27 21:21:52,128 INFO L175 Difference]: Start difference. First operand has 99 places, 135 transitions, 1112 flow. Second operand 7 states and 170 transitions. [2024-06-27 21:21:52,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 186 transitions, 1670 flow [2024-06-27 21:21:52,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 186 transitions, 1612 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:52,218 INFO L231 Difference]: Finished difference. Result has 104 places, 140 transitions, 1222 flow [2024-06-27 21:21:52,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1222, PETRI_PLACES=104, PETRI_TRANSITIONS=140} [2024-06-27 21:21:52,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-27 21:21:52,220 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 140 transitions, 1222 flow [2024-06-27 21:21:52,220 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 21:21:52,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:52,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:52,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:21:52,222 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:52,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -665529204, now seen corresponding path program 3 times [2024-06-27 21:21:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815615756] [2024-06-27 21:21:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:55,084 INFO 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 21:21:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815615756] [2024-06-27 21:21:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815615756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604706960] [2024-06-27 21:21:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:55,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:55,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 140 transitions, 1222 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 21:21:55,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:55,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:55,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:57,546 INFO L124 PetriNetUnfolderBase]: 7136/9928 cut-off events. [2024-06-27 21:21:57,546 INFO L125 PetriNetUnfolderBase]: For 93028/93041 co-relation queries the response was YES. [2024-06-27 21:21:57,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49234 conditions, 9928 events. 7136/9928 cut-off events. For 93028/93041 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51488 event pairs, 2984 based on Foata normal form. 16/9937 useless extension candidates. Maximal degree in co-relation 49193. Up to 9623 conditions per place. [2024-06-27 21:21:57,716 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 141 selfloop transitions, 40 changer transitions 0/187 dead transitions. [2024-06-27 21:21:57,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1766 flow [2024-06-27 21:21:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 21:21:57,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-27 21:21:57,718 INFO L175 Difference]: Start difference. First operand has 104 places, 140 transitions, 1222 flow. Second operand 7 states and 166 transitions. [2024-06-27 21:21:57,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1766 flow [2024-06-27 21:21:57,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 1652 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:57,812 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1249 flow [2024-06-27 21:21:57,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1249, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-27 21:21:57,813 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-27 21:21:57,813 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1249 flow [2024-06-27 21:21:57,813 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 21:21:57,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:57,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:57,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:21:57,813 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:57,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 203937116, now seen corresponding path program 4 times [2024-06-27 21:21:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:57,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38920506] [2024-06-27 21:21:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:57,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:00,501 INFO 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 21:22:00,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:00,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38920506] [2024-06-27 21:22:00,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38920506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:00,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975994408] [2024-06-27 21:22:00,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:00,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:00,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1249 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 21:22:00,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:00,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:00,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:03,184 INFO L124 PetriNetUnfolderBase]: 7121/9907 cut-off events. [2024-06-27 21:22:03,185 INFO L125 PetriNetUnfolderBase]: For 105756/105769 co-relation queries the response was YES. [2024-06-27 21:22:03,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50660 conditions, 9907 events. 7121/9907 cut-off events. For 105756/105769 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51371 event pairs, 2739 based on Foata normal form. 16/9916 useless extension candidates. Maximal degree in co-relation 50618. Up to 9432 conditions per place. [2024-06-27 21:22:03,247 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 134 selfloop transitions, 50 changer transitions 0/190 dead transitions. [2024-06-27 21:22:03,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 190 transitions, 1799 flow [2024-06-27 21:22:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:22:03,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-27 21:22:03,249 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1249 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:22:03,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 190 transitions, 1799 flow [2024-06-27 21:22:03,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 190 transitions, 1668 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:03,347 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1284 flow [2024-06-27 21:22:03,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-27 21:22:03,347 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-27 21:22:03,347 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1284 flow [2024-06-27 21:22:03,348 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 21:22:03,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:03,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:03,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:22:03,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:03,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1363574380, now seen corresponding path program 1 times [2024-06-27 21:22:03,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:03,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945576435] [2024-06-27 21:22:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:03,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945576435] [2024-06-27 21:22:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945576435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:06,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:06,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111403826] [2024-06-27 21:22:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:06,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:06,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:06,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:06,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1284 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 21:22:06,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:06,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:06,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:09,695 INFO L124 PetriNetUnfolderBase]: 7719/10791 cut-off events. [2024-06-27 21:22:09,695 INFO L125 PetriNetUnfolderBase]: For 134402/134405 co-relation queries the response was YES. [2024-06-27 21:22:09,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57236 conditions, 10791 events. 7719/10791 cut-off events. For 134402/134405 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57519 event pairs, 2389 based on Foata normal form. 32/10819 useless extension candidates. Maximal degree in co-relation 57193. Up to 9794 conditions per place. [2024-06-27 21:22:09,783 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 183 selfloop transitions, 43 changer transitions 0/232 dead transitions. [2024-06-27 21:22:09,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 232 transitions, 2184 flow [2024-06-27 21:22:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 21:22:09,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-27 21:22:09,785 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1284 flow. Second operand 9 states and 231 transitions. [2024-06-27 21:22:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 232 transitions, 2184 flow [2024-06-27 21:22:09,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 232 transitions, 2044 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:09,950 INFO L231 Difference]: Finished difference. Result has 113 places, 155 transitions, 1380 flow [2024-06-27 21:22:09,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1380, PETRI_PLACES=113, PETRI_TRANSITIONS=155} [2024-06-27 21:22:09,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-27 21:22:09,951 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 155 transitions, 1380 flow [2024-06-27 21:22:09,951 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 21:22:09,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:09,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:09,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:22:09,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:09,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash -97132032, now seen corresponding path program 2 times [2024-06-27 21:22:09,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:09,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213706189] [2024-06-27 21:22:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:13,404 INFO 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 21:22:13,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:13,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213706189] [2024-06-27 21:22:13,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213706189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:13,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:13,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:13,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654233149] [2024-06-27 21:22:13,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:13,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:13,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:13,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:13,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 155 transitions, 1380 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 21:22:13,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:13,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:13,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:16,042 INFO L124 PetriNetUnfolderBase]: 7621/10653 cut-off events. [2024-06-27 21:22:16,042 INFO L125 PetriNetUnfolderBase]: For 146882/146885 co-relation queries the response was YES. [2024-06-27 21:22:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57813 conditions, 10653 events. 7621/10653 cut-off events. For 146882/146885 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 56546 event pairs, 2869 based on Foata normal form. 42/10691 useless extension candidates. Maximal degree in co-relation 57768. Up to 10050 conditions per place. [2024-06-27 21:22:16,123 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 175 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-06-27 21:22:16,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 218 transitions, 2023 flow [2024-06-27 21:22:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 21:22:16,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-27 21:22:16,132 INFO L175 Difference]: Start difference. First operand has 113 places, 155 transitions, 1380 flow. Second operand 8 states and 202 transitions. [2024-06-27 21:22:16,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 218 transitions, 2023 flow [2024-06-27 21:22:16,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 218 transitions, 1925 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:16,321 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1392 flow [2024-06-27 21:22:16,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2024-06-27 21:22:16,322 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-27 21:22:16,322 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1392 flow [2024-06-27 21:22:16,322 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 21:22:16,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:16,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:16,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:22:16,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:16,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash -877229634, now seen corresponding path program 3 times [2024-06-27 21:22:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:16,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801992914] [2024-06-27 21:22:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:16,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:20,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801992914] [2024-06-27 21:22:20,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801992914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:20,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634950994] [2024-06-27 21:22:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:20,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:20,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1392 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 21:22:20,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:20,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:20,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:23,107 INFO L124 PetriNetUnfolderBase]: 7777/10901 cut-off events. [2024-06-27 21:22:23,107 INFO L125 PetriNetUnfolderBase]: For 156122/156122 co-relation queries the response was YES. [2024-06-27 21:22:23,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59375 conditions, 10901 events. 7777/10901 cut-off events. For 156122/156122 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 58628 event pairs, 2910 based on Foata normal form. 24/10919 useless extension candidates. Maximal degree in co-relation 59328. Up to 10306 conditions per place. [2024-06-27 21:22:23,192 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 51 changer transitions 0/217 dead transitions. [2024-06-27 21:22:23,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 217 transitions, 2050 flow [2024-06-27 21:22:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 21:22:23,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-27 21:22:23,194 INFO L175 Difference]: Start difference. First operand has 116 places, 156 transitions, 1392 flow. Second operand 8 states and 197 transitions. [2024-06-27 21:22:23,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 217 transitions, 2050 flow [2024-06-27 21:22:23,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 217 transitions, 1979 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:23,376 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1483 flow [2024-06-27 21:22:23,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2024-06-27 21:22:23,377 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-27 21:22:23,377 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1483 flow [2024-06-27 21:22:23,377 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 21:22:23,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:23,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:22:23,378 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:23,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1116647658, now seen corresponding path program 1 times [2024-06-27 21:22:23,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:23,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472709204] [2024-06-27 21:22:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:26,643 INFO 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 21:22:26,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:26,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472709204] [2024-06-27 21:22:26,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472709204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:26,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:26,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988630829] [2024-06-27 21:22:26,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:26,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:26,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1483 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 21:22:26,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:26,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:26,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:29,490 INFO L124 PetriNetUnfolderBase]: 7889/11093 cut-off events. [2024-06-27 21:22:29,491 INFO L125 PetriNetUnfolderBase]: For 175163/175163 co-relation queries the response was YES. [2024-06-27 21:22:29,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61725 conditions, 11093 events. 7889/11093 cut-off events. For 175163/175163 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 59939 event pairs, 2892 based on Foata normal form. 18/11105 useless extension candidates. Maximal degree in co-relation 61677. Up to 10038 conditions per place. [2024-06-27 21:22:29,578 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 57 changer transitions 0/223 dead transitions. [2024-06-27 21:22:29,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 223 transitions, 2186 flow [2024-06-27 21:22:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 21:22:29,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-27 21:22:29,582 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1483 flow. Second operand 8 states and 199 transitions. [2024-06-27 21:22:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 223 transitions, 2186 flow [2024-06-27 21:22:29,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2064 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:29,762 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1574 flow [2024-06-27 21:22:29,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1574, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-27 21:22:29,764 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-27 21:22:29,764 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1574 flow [2024-06-27 21:22:29,764 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 21:22:29,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:29,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:29,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:22:29,765 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:29,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1735754146, now seen corresponding path program 4 times [2024-06-27 21:22:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:29,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315994009] [2024-06-27 21:22:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:33,112 INFO 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 21:22:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:33,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315994009] [2024-06-27 21:22:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315994009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:33,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130568046] [2024-06-27 21:22:33,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:33,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:33,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:33,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:33,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1574 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 21:22:33,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:33,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:33,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:36,155 INFO L124 PetriNetUnfolderBase]: 7986/11245 cut-off events. [2024-06-27 21:22:36,155 INFO L125 PetriNetUnfolderBase]: For 194338/194338 co-relation queries the response was YES. [2024-06-27 21:22:36,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63881 conditions, 11245 events. 7986/11245 cut-off events. For 194338/194338 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 61059 event pairs, 2970 based on Foata normal form. 24/11259 useless extension candidates. Maximal degree in co-relation 63831. Up to 10629 conditions per place. [2024-06-27 21:22:36,260 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 163 selfloop transitions, 50 changer transitions 0/219 dead transitions. [2024-06-27 21:22:36,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 219 transitions, 2240 flow [2024-06-27 21:22:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 21:22:36,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-27 21:22:36,264 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1574 flow. Second operand 8 states and 193 transitions. [2024-06-27 21:22:36,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 219 transitions, 2240 flow [2024-06-27 21:22:36,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 219 transitions, 2110 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:36,459 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1612 flow [2024-06-27 21:22:36,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=124, PETRI_TRANSITIONS=163} [2024-06-27 21:22:36,460 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-27 21:22:36,460 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1612 flow [2024-06-27 21:22:36,460 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 21:22:36,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:36,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:36,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:22:36,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:36,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1541175334, now seen corresponding path program 2 times [2024-06-27 21:22:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75254834] [2024-06-27 21:22:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:39,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75254834] [2024-06-27 21:22:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75254834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:39,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605566932] [2024-06-27 21:22:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:39,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:39,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:39,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:39,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:39,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:39,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 163 transitions, 1612 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 21:22:39,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:39,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:39,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:42,562 INFO L124 PetriNetUnfolderBase]: 8098/11437 cut-off events. [2024-06-27 21:22:42,563 INFO L125 PetriNetUnfolderBase]: For 213014/213014 co-relation queries the response was YES. [2024-06-27 21:22:42,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65835 conditions, 11437 events. 8098/11437 cut-off events. For 213014/213014 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 62456 event pairs, 2970 based on Foata normal form. 18/11445 useless extension candidates. Maximal degree in co-relation 65784. Up to 10611 conditions per place. [2024-06-27 21:22:42,663 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 166 selfloop transitions, 53 changer transitions 0/225 dead transitions. [2024-06-27 21:22:42,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 225 transitions, 2310 flow [2024-06-27 21:22:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 21:22:42,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:22:42,665 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1612 flow. Second operand 8 states and 196 transitions. [2024-06-27 21:22:42,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 225 transitions, 2310 flow [2024-06-27 21:22:42,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 225 transitions, 2182 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:42,924 INFO L231 Difference]: Finished difference. Result has 126 places, 165 transitions, 1661 flow [2024-06-27 21:22:42,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=126, PETRI_TRANSITIONS=165} [2024-06-27 21:22:42,924 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-27 21:22:42,924 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 165 transitions, 1661 flow [2024-06-27 21:22:42,925 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 21:22:42,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:42,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:22:42,925 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2027084622, now seen corresponding path program 3 times [2024-06-27 21:22:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248836539] [2024-06-27 21:22:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:45,946 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 21:22:45,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:45,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248836539] [2024-06-27 21:22:45,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248836539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:45,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:45,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:45,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788148105] [2024-06-27 21:22:45,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:45,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:45,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:45,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 165 transitions, 1661 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 21:22:45,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:45,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:45,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:48,826 INFO L124 PetriNetUnfolderBase]: 8059/11380 cut-off events. [2024-06-27 21:22:48,826 INFO L125 PetriNetUnfolderBase]: For 225093/225093 co-relation queries the response was YES. [2024-06-27 21:22:48,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66027 conditions, 11380 events. 8059/11380 cut-off events. For 225093/225093 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61916 event pairs, 2595 based on Foata normal form. 18/11388 useless extension candidates. Maximal degree in co-relation 65975. Up to 9692 conditions per place. [2024-06-27 21:22:48,923 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 151 selfloop transitions, 68 changer transitions 0/225 dead transitions. [2024-06-27 21:22:48,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 225 transitions, 2311 flow [2024-06-27 21:22:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 21:22:48,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 21:22:48,925 INFO L175 Difference]: Start difference. First operand has 126 places, 165 transitions, 1661 flow. Second operand 8 states and 195 transitions. [2024-06-27 21:22:48,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 225 transitions, 2311 flow [2024-06-27 21:22:49,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 225 transitions, 2164 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:49,174 INFO L231 Difference]: Finished difference. Result has 127 places, 166 transitions, 1681 flow [2024-06-27 21:22:49,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1681, PETRI_PLACES=127, PETRI_TRANSITIONS=166} [2024-06-27 21:22:49,175 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-27 21:22:49,175 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 166 transitions, 1681 flow [2024-06-27 21:22:49,175 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 21:22:49,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:49,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:49,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:22:49,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:49,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:49,176 INFO L85 PathProgramCache]: Analyzing trace with hash -167216363, now seen corresponding path program 1 times [2024-06-27 21:22:49,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:49,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922128658] [2024-06-27 21:22:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:49,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:50,934 INFO 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 21:22:50,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922128658] [2024-06-27 21:22:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922128658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:50,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:50,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:22:50,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714124528] [2024-06-27 21:22:50,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:50,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:22:50,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:22:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:22:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:22:51,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 166 transitions, 1681 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 21:22:51,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:51,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:22:51,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:53,315 INFO L124 PetriNetUnfolderBase]: 7678/10973 cut-off events. [2024-06-27 21:22:53,316 INFO L125 PetriNetUnfolderBase]: For 230370/230373 co-relation queries the response was YES. [2024-06-27 21:22:53,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64159 conditions, 10973 events. 7678/10973 cut-off events. For 230370/230373 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61250 event pairs, 2957 based on Foata normal form. 10/10942 useless extension candidates. Maximal degree in co-relation 64106. Up to 10351 conditions per place. [2024-06-27 21:22:53,395 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 160 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2024-06-27 21:22:53,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 200 transitions, 2267 flow [2024-06-27 21:22:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:22:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:22:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 21:22:53,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:22:53,397 INFO L175 Difference]: Start difference. First operand has 127 places, 166 transitions, 1681 flow. Second operand 5 states and 125 transitions. [2024-06-27 21:22:53,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 200 transitions, 2267 flow [2024-06-27 21:22:53,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 200 transitions, 2086 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:53,658 INFO L231 Difference]: Finished difference. Result has 127 places, 176 transitions, 1665 flow [2024-06-27 21:22:53,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1665, PETRI_PLACES=127, PETRI_TRANSITIONS=176} [2024-06-27 21:22:53,659 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-27 21:22:53,659 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 176 transitions, 1665 flow [2024-06-27 21:22:53,659 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 21:22:53,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:53,659 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 21:22:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:22:53,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:53,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash -893506417, now seen corresponding path program 1 times [2024-06-27 21:22:53,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:53,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642093204] [2024-06-27 21:22:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:55,391 INFO 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 21:22:55,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:55,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642093204] [2024-06-27 21:22:55,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642093204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:55,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:55,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:22:55,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041382156] [2024-06-27 21:22:55,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:22:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:22:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:22:55,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:55,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 176 transitions, 1665 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 21:22:55,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:55,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:55,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:58,106 INFO L124 PetriNetUnfolderBase]: 8104/11451 cut-off events. [2024-06-27 21:22:58,107 INFO L125 PetriNetUnfolderBase]: For 252929/252935 co-relation queries the response was YES. [2024-06-27 21:22:58,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69329 conditions, 11451 events. 8104/11451 cut-off events. For 252929/252935 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62592 event pairs, 2971 based on Foata normal form. 6/11452 useless extension candidates. Maximal degree in co-relation 69274. Up to 11191 conditions per place. [2024-06-27 21:22:58,202 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 186 selfloop transitions, 21 changer transitions 0/213 dead transitions. [2024-06-27 21:22:58,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 213 transitions, 2399 flow [2024-06-27 21:22:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:22:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:22:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 21:22:58,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-27 21:22:58,204 INFO L175 Difference]: Start difference. First operand has 127 places, 176 transitions, 1665 flow. Second operand 6 states and 139 transitions. [2024-06-27 21:22:58,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 213 transitions, 2399 flow [2024-06-27 21:22:58,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 213 transitions, 2345 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-27 21:22:58,475 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 1818 flow [2024-06-27 21:22:58,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1818, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-27 21:22:58,476 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-27 21:22:58,476 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 1818 flow [2024-06-27 21:22:58,476 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 21:22:58,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:58,476 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 21:22:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:22:58,476 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:58,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1270927, now seen corresponding path program 2 times [2024-06-27 21:22:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:58,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846567420] [2024-06-27 21:22:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:58,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:00,213 INFO 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 21:23:00,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846567420] [2024-06-27 21:23:00,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846567420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:00,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:23:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764197975] [2024-06-27 21:23:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:00,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:23:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:23:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:23:00,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:00,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 1818 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 21:23:00,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:00,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:00,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:02,718 INFO L124 PetriNetUnfolderBase]: 8097/11442 cut-off events. [2024-06-27 21:23:02,718 INFO L125 PetriNetUnfolderBase]: For 276383/276389 co-relation queries the response was YES. [2024-06-27 21:23:02,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71431 conditions, 11442 events. 8097/11442 cut-off events. For 276383/276389 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62466 event pairs, 2971 based on Foata normal form. 6/11443 useless extension candidates. Maximal degree in co-relation 71373. Up to 11195 conditions per place. [2024-06-27 21:23:02,803 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 183 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-06-27 21:23:02,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 206 transitions, 2282 flow [2024-06-27 21:23:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:23:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:23:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:23:02,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:23:02,804 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 1818 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:23:02,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 206 transitions, 2282 flow [2024-06-27 21:23:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 206 transitions, 2156 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-27 21:23:03,134 INFO L231 Difference]: Finished difference. Result has 135 places, 184 transitions, 1740 flow [2024-06-27 21:23:03,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1740, PETRI_PLACES=135, PETRI_TRANSITIONS=184} [2024-06-27 21:23:03,135 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-27 21:23:03,135 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 184 transitions, 1740 flow [2024-06-27 21:23:03,135 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 21:23:03,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:03,135 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 21:23:03,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:23:03,136 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:03,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2106209130, now seen corresponding path program 1 times [2024-06-27 21:23:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:03,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262121809] [2024-06-27 21:23:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:06,227 INFO 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 21:23:06,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:06,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262121809] [2024-06-27 21:23:06,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262121809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:06,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413784737] [2024-06-27 21:23:06,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:06,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:06,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 184 transitions, 1740 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:06,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:06,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:06,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:09,064 INFO L124 PetriNetUnfolderBase]: 8186/11681 cut-off events. [2024-06-27 21:23:09,064 INFO L125 PetriNetUnfolderBase]: For 304602/304632 co-relation queries the response was YES. [2024-06-27 21:23:09,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73333 conditions, 11681 events. 8186/11681 cut-off events. For 304602/304632 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 65363 event pairs, 2922 based on Foata normal form. 20/11649 useless extension candidates. Maximal degree in co-relation 73273. Up to 10665 conditions per place. [2024-06-27 21:23:09,167 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 189 selfloop transitions, 53 changer transitions 0/265 dead transitions. [2024-06-27 21:23:09,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 265 transitions, 2832 flow [2024-06-27 21:23:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 21:23:09,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:23:09,169 INFO L175 Difference]: Start difference. First operand has 135 places, 184 transitions, 1740 flow. Second operand 9 states and 216 transitions. [2024-06-27 21:23:09,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 265 transitions, 2832 flow [2024-06-27 21:23:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 265 transitions, 2798 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:09,529 INFO L231 Difference]: Finished difference. Result has 142 places, 210 transitions, 2128 flow [2024-06-27 21:23:09,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2128, PETRI_PLACES=142, PETRI_TRANSITIONS=210} [2024-06-27 21:23:09,529 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-27 21:23:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 210 transitions, 2128 flow [2024-06-27 21:23:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:09,530 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 21:23:09,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:23:09,530 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:09,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash -39581196, now seen corresponding path program 2 times [2024-06-27 21:23:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296209301] [2024-06-27 21:23:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:09,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:12,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:12,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296209301] [2024-06-27 21:23:12,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296209301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:12,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:12,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098990505] [2024-06-27 21:23:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:12,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:12,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 210 transitions, 2128 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:12,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:12,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:12,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:15,142 INFO L124 PetriNetUnfolderBase]: 8228/11739 cut-off events. [2024-06-27 21:23:15,142 INFO L125 PetriNetUnfolderBase]: For 334194/334224 co-relation queries the response was YES. [2024-06-27 21:23:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77667 conditions, 11739 events. 8228/11739 cut-off events. For 334194/334224 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 65653 event pairs, 2902 based on Foata normal form. 20/11707 useless extension candidates. Maximal degree in co-relation 77604. Up to 10709 conditions per place. [2024-06-27 21:23:15,249 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 179 selfloop transitions, 53 changer transitions 0/255 dead transitions. [2024-06-27 21:23:15,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 255 transitions, 2860 flow [2024-06-27 21:23:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 21:23:15,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-27 21:23:15,251 INFO L175 Difference]: Start difference. First operand has 142 places, 210 transitions, 2128 flow. Second operand 7 states and 170 transitions. [2024-06-27 21:23:15,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 255 transitions, 2860 flow [2024-06-27 21:23:15,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 255 transitions, 2766 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-27 21:23:15,722 INFO L231 Difference]: Finished difference. Result has 148 places, 216 transitions, 2288 flow [2024-06-27 21:23:15,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2288, PETRI_PLACES=148, PETRI_TRANSITIONS=216} [2024-06-27 21:23:15,723 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-27 21:23:15,723 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 216 transitions, 2288 flow [2024-06-27 21:23:15,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:15,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:15,723 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 21:23:15,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:23:15,724 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:15,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1467679546, now seen corresponding path program 3 times [2024-06-27 21:23:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328746643] [2024-06-27 21:23:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:15,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:18,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328746643] [2024-06-27 21:23:18,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328746643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:18,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:18,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:18,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326900213] [2024-06-27 21:23:18,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:18,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:18,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:18,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:18,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 216 transitions, 2288 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:18,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:18,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:18,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:21,333 INFO L124 PetriNetUnfolderBase]: 8334/11885 cut-off events. [2024-06-27 21:23:21,333 INFO L125 PetriNetUnfolderBase]: For 354549/354627 co-relation queries the response was YES. [2024-06-27 21:23:21,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79940 conditions, 11885 events. 8334/11885 cut-off events. For 354549/354627 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 66429 event pairs, 2931 based on Foata normal form. 31/11842 useless extension candidates. Maximal degree in co-relation 79874. Up to 10533 conditions per place. [2024-06-27 21:23:21,435 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 176 selfloop transitions, 65 changer transitions 0/264 dead transitions. [2024-06-27 21:23:21,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 264 transitions, 3182 flow [2024-06-27 21:23:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:23:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:23:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 21:23:21,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-27 21:23:21,438 INFO L175 Difference]: Start difference. First operand has 148 places, 216 transitions, 2288 flow. Second operand 6 states and 151 transitions. [2024-06-27 21:23:21,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 264 transitions, 3182 flow [2024-06-27 21:23:21,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 264 transitions, 3050 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:21,869 INFO L231 Difference]: Finished difference. Result has 151 places, 230 transitions, 2534 flow [2024-06-27 21:23:21,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2534, PETRI_PLACES=151, PETRI_TRANSITIONS=230} [2024-06-27 21:23:21,870 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-27 21:23:21,870 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 230 transitions, 2534 flow [2024-06-27 21:23:21,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:21,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:21,870 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 21:23:21,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:23:21,871 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:21,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash 931386918, now seen corresponding path program 1 times [2024-06-27 21:23:21,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:21,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734765687] [2024-06-27 21:23:21,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:21,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:23,824 INFO 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 21:23:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:23,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734765687] [2024-06-27 21:23:23,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734765687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:23,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:23,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368995985] [2024-06-27 21:23:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:23,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:23,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:23,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:23,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 230 transitions, 2534 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 21:23:23,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:23,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:23,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:26,846 INFO L124 PetriNetUnfolderBase]: 9017/12685 cut-off events. [2024-06-27 21:23:26,847 INFO L125 PetriNetUnfolderBase]: For 364084/364084 co-relation queries the response was YES. [2024-06-27 21:23:26,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87282 conditions, 12685 events. 9017/12685 cut-off events. For 364084/364084 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 69058 event pairs, 3003 based on Foata normal form. 8/12686 useless extension candidates. Maximal degree in co-relation 87214. Up to 12071 conditions per place. [2024-06-27 21:23:26,975 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 249 selfloop transitions, 37 changer transitions 0/292 dead transitions. [2024-06-27 21:23:26,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 292 transitions, 3760 flow [2024-06-27 21:23:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 21:23:26,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:23:26,977 INFO L175 Difference]: Start difference. First operand has 151 places, 230 transitions, 2534 flow. Second operand 7 states and 175 transitions. [2024-06-27 21:23:26,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 292 transitions, 3760 flow [2024-06-27 21:23:27,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 292 transitions, 3658 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-27 21:23:27,537 INFO L231 Difference]: Finished difference. Result has 159 places, 245 transitions, 2788 flow [2024-06-27 21:23:27,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=159, PETRI_TRANSITIONS=245} [2024-06-27 21:23:27,539 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-27 21:23:27,539 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 245 transitions, 2788 flow [2024-06-27 21:23:27,539 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 21:23:27,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:27,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:27,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:23:27,540 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:27,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1822585458, now seen corresponding path program 2 times [2024-06-27 21:23:27,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:27,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598896801] [2024-06-27 21:23:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:27,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:29,615 INFO 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 21:23:29,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:29,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598896801] [2024-06-27 21:23:29,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598896801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:29,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:29,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:29,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368131539] [2024-06-27 21:23:29,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:29,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:29,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:29,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:29,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:29,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 245 transitions, 2788 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 21:23:29,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:29,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:29,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:32,907 INFO L124 PetriNetUnfolderBase]: 9139/12854 cut-off events. [2024-06-27 21:23:32,907 INFO L125 PetriNetUnfolderBase]: For 390148/390154 co-relation queries the response was YES. [2024-06-27 21:23:32,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89433 conditions, 12854 events. 9139/12854 cut-off events. For 390148/390154 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70041 event pairs, 2994 based on Foata normal form. 12/12861 useless extension candidates. Maximal degree in co-relation 89360. Up to 12267 conditions per place. [2024-06-27 21:23:33,025 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 263 selfloop transitions, 39 changer transitions 0/308 dead transitions. [2024-06-27 21:23:33,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 308 transitions, 3996 flow [2024-06-27 21:23:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 21:23:33,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:23:33,028 INFO L175 Difference]: Start difference. First operand has 159 places, 245 transitions, 2788 flow. Second operand 8 states and 196 transitions. [2024-06-27 21:23:33,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 308 transitions, 3996 flow [2024-06-27 21:23:33,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 308 transitions, 3853 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-27 21:23:33,642 INFO L231 Difference]: Finished difference. Result has 166 places, 256 transitions, 2968 flow [2024-06-27 21:23:33,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2968, PETRI_PLACES=166, PETRI_TRANSITIONS=256} [2024-06-27 21:23:33,645 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-27 21:23:33,645 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 256 transitions, 2968 flow [2024-06-27 21:23:33,645 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 21:23:33,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:33,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:23:33,646 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:33,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash -39396684, now seen corresponding path program 3 times [2024-06-27 21:23:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:33,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930435244] [2024-06-27 21:23:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:35,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930435244] [2024-06-27 21:23:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930435244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:35,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:35,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:35,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246036330] [2024-06-27 21:23:35,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:35,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:35,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:36,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:36,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 256 transitions, 2968 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 21:23:36,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:36,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:36,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:39,001 INFO L124 PetriNetUnfolderBase]: 9121/12833 cut-off events. [2024-06-27 21:23:39,001 INFO L125 PetriNetUnfolderBase]: For 411614/411614 co-relation queries the response was YES. [2024-06-27 21:23:39,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90284 conditions, 12833 events. 9121/12833 cut-off events. For 411614/411614 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 69890 event pairs, 3018 based on Foata normal form. 8/12834 useless extension candidates. Maximal degree in co-relation 90208. Up to 12257 conditions per place. [2024-06-27 21:23:39,137 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 251 selfloop transitions, 35 changer transitions 0/292 dead transitions. [2024-06-27 21:23:39,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 292 transitions, 3784 flow [2024-06-27 21:23:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:23:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:23:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:23:39,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:23:39,138 INFO L175 Difference]: Start difference. First operand has 166 places, 256 transitions, 2968 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:23:39,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 292 transitions, 3784 flow [2024-06-27 21:23:39,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 292 transitions, 3601 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:39,958 INFO L231 Difference]: Finished difference. Result has 168 places, 256 transitions, 2866 flow [2024-06-27 21:23:39,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2866, PETRI_PLACES=168, PETRI_TRANSITIONS=256} [2024-06-27 21:23:39,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-27 21:23:39,958 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 256 transitions, 2866 flow [2024-06-27 21:23:39,959 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 21:23:39,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:39,959 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 21:23:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:23:39,959 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:39,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -39181358, now seen corresponding path program 1 times [2024-06-27 21:23:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:39,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139440695] [2024-06-27 21:23:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139440695] [2024-06-27 21:23:43,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139440695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:43,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:43,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:43,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606096734] [2024-06-27 21:23:43,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:43,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:43,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:43,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:43,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 256 transitions, 2866 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 21:23:43,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:43,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:43,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:46,034 INFO L124 PetriNetUnfolderBase]: 8621/12316 cut-off events. [2024-06-27 21:23:46,035 INFO L125 PetriNetUnfolderBase]: For 424443/424522 co-relation queries the response was YES. [2024-06-27 21:23:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87170 conditions, 12316 events. 8621/12316 cut-off events. For 424443/424522 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 69156 event pairs, 2949 based on Foata normal form. 18/12283 useless extension candidates. Maximal degree in co-relation 87092. Up to 11484 conditions per place. [2024-06-27 21:23:46,168 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 20 changer transitions 0/294 dead transitions. [2024-06-27 21:23:46,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 294 transitions, 3680 flow [2024-06-27 21:23:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:23:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:23:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:23:46,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:23:46,175 INFO L175 Difference]: Start difference. First operand has 168 places, 256 transitions, 2866 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:23:46,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 294 transitions, 3680 flow [2024-06-27 21:23:46,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 294 transitions, 3610 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:23:46,910 INFO L231 Difference]: Finished difference. Result has 169 places, 259 transitions, 2927 flow [2024-06-27 21:23:46,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2927, PETRI_PLACES=169, PETRI_TRANSITIONS=259} [2024-06-27 21:23:46,910 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-27 21:23:46,911 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 259 transitions, 2927 flow [2024-06-27 21:23:46,911 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 21:23:46,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:46,911 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 21:23:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:23:46,911 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:46,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash -872740050, now seen corresponding path program 1 times [2024-06-27 21:23:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:46,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903976746] [2024-06-27 21:23:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:49,624 INFO 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 21:23:49,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903976746] [2024-06-27 21:23:49,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903976746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:49,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:49,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:49,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672916888] [2024-06-27 21:23:49,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:49,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:49,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:49,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:49,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 259 transitions, 2927 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 21:23:49,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:49,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:49,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:52,814 INFO L124 PetriNetUnfolderBase]: 9250/13003 cut-off events. [2024-06-27 21:23:52,814 INFO L125 PetriNetUnfolderBase]: For 472934/472946 co-relation queries the response was YES. [2024-06-27 21:23:52,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93439 conditions, 13003 events. 9250/13003 cut-off events. For 472934/472946 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 71048 event pairs, 3091 based on Foata normal form. 10/13004 useless extension candidates. Maximal degree in co-relation 93360. Up to 12473 conditions per place. [2024-06-27 21:23:52,950 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 249 selfloop transitions, 61 changer transitions 0/316 dead transitions. [2024-06-27 21:23:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 316 transitions, 4223 flow [2024-06-27 21:23:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 21:23:52,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-27 21:23:52,959 INFO L175 Difference]: Start difference. First operand has 169 places, 259 transitions, 2927 flow. Second operand 7 states and 171 transitions. [2024-06-27 21:23:52,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 316 transitions, 4223 flow [2024-06-27 21:23:53,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 316 transitions, 4126 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:53,636 INFO L231 Difference]: Finished difference. Result has 172 places, 271 transitions, 3271 flow [2024-06-27 21:23:53,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3271, PETRI_PLACES=172, PETRI_TRANSITIONS=271} [2024-06-27 21:23:53,637 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-27 21:23:53,637 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 271 transitions, 3271 flow [2024-06-27 21:23:53,638 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 21:23:53,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:53,638 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 21:23:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:23:53,638 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -867978450, now seen corresponding path program 2 times [2024-06-27 21:23:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:53,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096598906] [2024-06-27 21:23:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:56,677 INFO 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 21:23:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096598906] [2024-06-27 21:23:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096598906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287654233] [2024-06-27 21:23:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:56,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:56,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:56,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 271 transitions, 3271 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 21:23:56,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:56,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:56,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:59,883 INFO L124 PetriNetUnfolderBase]: 9288/13084 cut-off events. [2024-06-27 21:23:59,884 INFO L125 PetriNetUnfolderBase]: For 507127/507130 co-relation queries the response was YES. [2024-06-27 21:23:59,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95908 conditions, 13084 events. 9288/13084 cut-off events. For 507127/507130 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 71763 event pairs, 3091 based on Foata normal form. 4/13084 useless extension candidates. Maximal degree in co-relation 95828. Up to 12619 conditions per place. [2024-06-27 21:24:00,017 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 271 selfloop transitions, 41 changer transitions 0/318 dead transitions. [2024-06-27 21:24:00,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 318 transitions, 4160 flow [2024-06-27 21:24:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:24:00,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-27 21:24:00,019 INFO L175 Difference]: Start difference. First operand has 172 places, 271 transitions, 3271 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:24:00,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 318 transitions, 4160 flow [2024-06-27 21:24:00,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 318 transitions, 3989 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:00,782 INFO L231 Difference]: Finished difference. Result has 177 places, 279 transitions, 3352 flow [2024-06-27 21:24:00,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3352, PETRI_PLACES=177, PETRI_TRANSITIONS=279} [2024-06-27 21:24:00,782 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-27 21:24:00,782 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 279 transitions, 3352 flow [2024-06-27 21:24:00,783 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 21:24:00,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:00,783 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 21:24:00,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:24:00,783 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:00,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash 333489104, now seen corresponding path program 3 times [2024-06-27 21:24:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:00,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894763822] [2024-06-27 21:24:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:03,588 INFO 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 21:24:03,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:03,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894763822] [2024-06-27 21:24:03,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894763822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:03,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:03,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:03,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478048748] [2024-06-27 21:24:03,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:03,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:03,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:03,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:03,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:03,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 279 transitions, 3352 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 21:24:03,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:03,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:03,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:07,173 INFO L124 PetriNetUnfolderBase]: 9307/13102 cut-off events. [2024-06-27 21:24:07,173 INFO L125 PetriNetUnfolderBase]: For 529499/529549 co-relation queries the response was YES. [2024-06-27 21:24:07,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96240 conditions, 13102 events. 9307/13102 cut-off events. For 529499/529549 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71916 event pairs, 3091 based on Foata normal form. 29/13121 useless extension candidates. Maximal degree in co-relation 96158. Up to 12538 conditions per place. [2024-06-27 21:24:07,305 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 252 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-27 21:24:07,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 326 transitions, 4478 flow [2024-06-27 21:24:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:24:07,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-27 21:24:07,309 INFO L175 Difference]: Start difference. First operand has 177 places, 279 transitions, 3352 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:24:07,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 326 transitions, 4478 flow [2024-06-27 21:24:08,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 326 transitions, 4336 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:08,122 INFO L231 Difference]: Finished difference. Result has 179 places, 283 transitions, 3450 flow [2024-06-27 21:24:08,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3450, PETRI_PLACES=179, PETRI_TRANSITIONS=283} [2024-06-27 21:24:08,122 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-27 21:24:08,122 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 283 transitions, 3450 flow [2024-06-27 21:24:08,123 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 21:24:08,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:08,123 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 21:24:08,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:24:08,123 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:08,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2044676966, now seen corresponding path program 4 times [2024-06-27 21:24:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:08,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233183580] [2024-06-27 21:24:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:08,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:10,871 INFO 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 21:24:10,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:10,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233183580] [2024-06-27 21:24:10,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233183580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:10,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:10,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:10,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381263511] [2024-06-27 21:24:10,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:10,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:10,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:10,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:10,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 283 transitions, 3450 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 21:24:10,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:10,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:10,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:14,423 INFO L124 PetriNetUnfolderBase]: 9326/13127 cut-off events. [2024-06-27 21:24:14,423 INFO L125 PetriNetUnfolderBase]: For 551745/551788 co-relation queries the response was YES. [2024-06-27 21:24:14,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97268 conditions, 13127 events. 9326/13127 cut-off events. For 551745/551788 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71928 event pairs, 3091 based on Foata normal form. 25/13142 useless extension candidates. Maximal degree in co-relation 97185. Up to 12558 conditions per place. [2024-06-27 21:24:14,552 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 243 selfloop transitions, 74 changer transitions 0/323 dead transitions. [2024-06-27 21:24:14,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 323 transitions, 4428 flow [2024-06-27 21:24:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:24:14,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:24:14,557 INFO L175 Difference]: Start difference. First operand has 179 places, 283 transitions, 3450 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:24:14,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 323 transitions, 4428 flow [2024-06-27 21:24:15,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 323 transitions, 4164 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 21:24:15,445 INFO L231 Difference]: Finished difference. Result has 180 places, 287 transitions, 3445 flow [2024-06-27 21:24:15,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3445, PETRI_PLACES=180, PETRI_TRANSITIONS=287} [2024-06-27 21:24:15,446 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-27 21:24:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 287 transitions, 3445 flow [2024-06-27 21:24:15,446 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 21:24:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:15,447 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 21:24:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:24:15,447 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:15,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 424144742, now seen corresponding path program 5 times [2024-06-27 21:24:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392925773] [2024-06-27 21:24:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:18,179 INFO 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 21:24:18,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:18,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392925773] [2024-06-27 21:24:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392925773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:18,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936213092] [2024-06-27 21:24:18,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:18,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 287 transitions, 3445 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 21:24:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:21,826 INFO L124 PetriNetUnfolderBase]: 9319/13113 cut-off events. [2024-06-27 21:24:21,827 INFO L125 PetriNetUnfolderBase]: For 570449/570452 co-relation queries the response was YES. [2024-06-27 21:24:21,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97541 conditions, 13113 events. 9319/13113 cut-off events. For 570449/570452 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71934 event pairs, 3072 based on Foata normal form. 4/13113 useless extension candidates. Maximal degree in co-relation 97458. Up to 12505 conditions per place. [2024-06-27 21:24:21,960 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 257 selfloop transitions, 82 changer transitions 0/345 dead transitions. [2024-06-27 21:24:21,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 345 transitions, 4439 flow [2024-06-27 21:24:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 21:24:21,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-27 21:24:21,962 INFO L175 Difference]: Start difference. First operand has 180 places, 287 transitions, 3445 flow. Second operand 8 states and 198 transitions. [2024-06-27 21:24:21,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 345 transitions, 4439 flow [2024-06-27 21:24:23,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 345 transitions, 4208 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:23,037 INFO L231 Difference]: Finished difference. Result has 184 places, 287 transitions, 3421 flow [2024-06-27 21:24:23,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3421, PETRI_PLACES=184, PETRI_TRANSITIONS=287} [2024-06-27 21:24:23,037 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-27 21:24:23,037 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 287 transitions, 3421 flow [2024-06-27 21:24:23,038 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 21:24:23,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:23,038 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 21:24:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:24:23,038 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:23,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1221308016, now seen corresponding path program 6 times [2024-06-27 21:24:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729765898] [2024-06-27 21:24:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:23,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:25,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729765898] [2024-06-27 21:24:25,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729765898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:25,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:25,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:25,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592260009] [2024-06-27 21:24:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:25,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:25,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:25,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:25,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 287 transitions, 3421 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 21:24:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:25,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:25,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:29,424 INFO L124 PetriNetUnfolderBase]: 9440/13286 cut-off events. [2024-06-27 21:24:29,425 INFO L125 PetriNetUnfolderBase]: For 596769/596773 co-relation queries the response was YES. [2024-06-27 21:24:29,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99447 conditions, 13286 events. 9440/13286 cut-off events. For 596769/596773 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 72764 event pairs, 3111 based on Foata normal form. 3/13279 useless extension candidates. Maximal degree in co-relation 99363. Up to 12795 conditions per place. [2024-06-27 21:24:29,555 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 279 selfloop transitions, 58 changer transitions 0/343 dead transitions. [2024-06-27 21:24:29,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 343 transitions, 4567 flow [2024-06-27 21:24:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 21:24:29,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-27 21:24:29,557 INFO L175 Difference]: Start difference. First operand has 184 places, 287 transitions, 3421 flow. Second operand 8 states and 167 transitions. [2024-06-27 21:24:29,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 343 transitions, 4567 flow [2024-06-27 21:24:30,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 343 transitions, 4227 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-27 21:24:30,382 INFO L231 Difference]: Finished difference. Result has 187 places, 311 transitions, 3670 flow [2024-06-27 21:24:30,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3670, PETRI_PLACES=187, PETRI_TRANSITIONS=311} [2024-06-27 21:24:30,383 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-27 21:24:30,383 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 311 transitions, 3670 flow [2024-06-27 21:24:30,383 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 21:24:30,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:30,383 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 21:24:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:24:30,384 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:30,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 330996270, now seen corresponding path program 1 times [2024-06-27 21:24:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:30,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039863681] [2024-06-27 21:24:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:32,523 INFO 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 21:24:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:32,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039863681] [2024-06-27 21:24:32,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039863681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:32,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:32,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:32,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315535962] [2024-06-27 21:24:32,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:32,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:32,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:32,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 311 transitions, 3670 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 21:24:32,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:32,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:32,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:35,736 INFO L124 PetriNetUnfolderBase]: 9472/13336 cut-off events. [2024-06-27 21:24:35,737 INFO L125 PetriNetUnfolderBase]: For 570122/570125 co-relation queries the response was YES. [2024-06-27 21:24:35,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99054 conditions, 13336 events. 9472/13336 cut-off events. For 570122/570125 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73125 event pairs, 2948 based on Foata normal form. 6/13337 useless extension candidates. Maximal degree in co-relation 98966. Up to 12881 conditions per place. [2024-06-27 21:24:35,897 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 320 selfloop transitions, 30 changer transitions 0/356 dead transitions. [2024-06-27 21:24:35,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 356 transitions, 4796 flow [2024-06-27 21:24:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:24:35,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-27 21:24:35,899 INFO L175 Difference]: Start difference. First operand has 187 places, 311 transitions, 3670 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:24:35,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 356 transitions, 4796 flow [2024-06-27 21:24:37,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 356 transitions, 4625 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:37,038 INFO L231 Difference]: Finished difference. Result has 189 places, 317 transitions, 3753 flow [2024-06-27 21:24:37,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3753, PETRI_PLACES=189, PETRI_TRANSITIONS=317} [2024-06-27 21:24:37,039 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-27 21:24:37,039 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 317 transitions, 3753 flow [2024-06-27 21:24:37,039 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 21:24:37,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:37,040 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 21:24:37,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:24:37,040 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:37,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 333853230, now seen corresponding path program 2 times [2024-06-27 21:24:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115086037] [2024-06-27 21:24:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:39,566 INFO 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 21:24:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115086037] [2024-06-27 21:24:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115086037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:39,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:39,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856659134] [2024-06-27 21:24:39,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:39,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:39,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:39,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:39,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 317 transitions, 3753 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 21:24:39,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:39,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:39,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:43,363 INFO L124 PetriNetUnfolderBase]: 9504/13381 cut-off events. [2024-06-27 21:24:43,363 INFO L125 PetriNetUnfolderBase]: For 604668/604671 co-relation queries the response was YES. [2024-06-27 21:24:43,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100621 conditions, 13381 events. 9504/13381 cut-off events. For 604668/604671 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73455 event pairs, 3098 based on Foata normal form. 6/13382 useless extension candidates. Maximal degree in co-relation 100533. Up to 13003 conditions per place. [2024-06-27 21:24:43,498 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 321 selfloop transitions, 25 changer transitions 0/352 dead transitions. [2024-06-27 21:24:43,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 352 transitions, 4631 flow [2024-06-27 21:24:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 21:24:43,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:24:43,503 INFO L175 Difference]: Start difference. First operand has 189 places, 317 transitions, 3753 flow. Second operand 7 states and 156 transitions. [2024-06-27 21:24:43,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 352 transitions, 4631 flow [2024-06-27 21:24:44,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 352 transitions, 4463 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:44,732 INFO L231 Difference]: Finished difference. Result has 193 places, 320 transitions, 3745 flow [2024-06-27 21:24:44,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3745, PETRI_PLACES=193, PETRI_TRANSITIONS=320} [2024-06-27 21:24:44,733 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2024-06-27 21:24:44,734 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 320 transitions, 3745 flow [2024-06-27 21:24:44,739 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 21:24:44,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:44,739 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 21:24:44,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:24:44,739 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:44,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1221300080, now seen corresponding path program 3 times [2024-06-27 21:24:44,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:44,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797405519] [2024-06-27 21:24:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:47,007 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 21:24:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:47,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797405519] [2024-06-27 21:24:47,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797405519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:47,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:47,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234566686] [2024-06-27 21:24:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:47,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:47,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:47,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:47,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 320 transitions, 3745 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 21:24:47,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:47,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:47,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:50,681 INFO L124 PetriNetUnfolderBase]: 9492/13364 cut-off events. [2024-06-27 21:24:50,682 INFO L125 PetriNetUnfolderBase]: For 625127/625130 co-relation queries the response was YES. [2024-06-27 21:24:50,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100624 conditions, 13364 events. 9492/13364 cut-off events. For 625127/625130 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 73221 event pairs, 2946 based on Foata normal form. 6/13365 useless extension candidates. Maximal degree in co-relation 100534. Up to 12960 conditions per place. [2024-06-27 21:24:50,807 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 321 selfloop transitions, 24 changer transitions 0/351 dead transitions. [2024-06-27 21:24:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 351 transitions, 4523 flow [2024-06-27 21:24:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 21:24:50,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-27 21:24:50,809 INFO L175 Difference]: Start difference. First operand has 193 places, 320 transitions, 3745 flow. Second operand 6 states and 142 transitions. [2024-06-27 21:24:50,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 351 transitions, 4523 flow [2024-06-27 21:24:52,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 351 transitions, 4373 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:52,141 INFO L231 Difference]: Finished difference. Result has 194 places, 320 transitions, 3655 flow [2024-06-27 21:24:52,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3655, PETRI_PLACES=194, PETRI_TRANSITIONS=320} [2024-06-27 21:24:52,141 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-27 21:24:52,142 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 320 transitions, 3655 flow [2024-06-27 21:24:52,142 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 21:24:52,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:52,142 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 21:24:52,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:24:52,142 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:52,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1342335517, now seen corresponding path program 1 times [2024-06-27 21:24:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:52,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735846341] [2024-06-27 21:24:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:53,749 INFO 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 21:24:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:53,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735846341] [2024-06-27 21:24:53,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735846341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:53,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:53,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:24:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212288107] [2024-06-27 21:24:53,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:53,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:24:53,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:24:53,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:24:53,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:24:53,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 320 transitions, 3655 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:53,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:53,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:24:53,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:57,090 INFO L124 PetriNetUnfolderBase]: 8409/12164 cut-off events. [2024-06-27 21:24:57,091 INFO L125 PetriNetUnfolderBase]: For 639716/639806 co-relation queries the response was YES. [2024-06-27 21:24:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94001 conditions, 12164 events. 8409/12164 cut-off events. For 639716/639806 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70403 event pairs, 2809 based on Foata normal form. 8/11982 useless extension candidates. Maximal degree in co-relation 93910. Up to 10979 conditions per place. [2024-06-27 21:24:57,229 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 250 selfloop transitions, 20 changer transitions 0/337 dead transitions. [2024-06-27 21:24:57,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 337 transitions, 4239 flow [2024-06-27 21:24:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 21:24:57,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-27 21:24:57,231 INFO L175 Difference]: Start difference. First operand has 194 places, 320 transitions, 3655 flow. Second operand 6 states and 135 transitions. [2024-06-27 21:24:57,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 337 transitions, 4239 flow [2024-06-27 21:24:58,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 337 transitions, 4171 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:58,390 INFO L231 Difference]: Finished difference. Result has 195 places, 320 transitions, 3637 flow [2024-06-27 21:24:58,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3637, PETRI_PLACES=195, PETRI_TRANSITIONS=320} [2024-06-27 21:24:58,391 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 140 predicate places. [2024-06-27 21:24:58,391 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 320 transitions, 3637 flow [2024-06-27 21:24:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:58,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:58,392 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 21:24:58,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:24:58,392 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:58,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1289873482, now seen corresponding path program 1 times [2024-06-27 21:24:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:58,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149209599] [2024-06-27 21:24:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:58,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:02,369 INFO 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 21:25:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149209599] [2024-06-27 21:25:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149209599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:02,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079007452] [2024-06-27 21:25:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:02,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:02,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:02,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 320 transitions, 3637 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 21:25:02,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:02,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:02,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:06,067 INFO L124 PetriNetUnfolderBase]: 9403/13240 cut-off events. [2024-06-27 21:25:06,067 INFO L125 PetriNetUnfolderBase]: For 651413/651416 co-relation queries the response was YES. [2024-06-27 21:25:06,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100796 conditions, 13240 events. 9403/13240 cut-off events. For 651413/651416 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 72673 event pairs, 3002 based on Foata normal form. 4/13240 useless extension candidates. Maximal degree in co-relation 100704. Up to 12671 conditions per place. [2024-06-27 21:25:06,243 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 305 selfloop transitions, 66 changer transitions 0/377 dead transitions. [2024-06-27 21:25:06,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 377 transitions, 4645 flow [2024-06-27 21:25:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 21:25:06,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-27 21:25:06,246 INFO L175 Difference]: Start difference. First operand has 195 places, 320 transitions, 3637 flow. Second operand 8 states and 193 transitions. [2024-06-27 21:25:06,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 377 transitions, 4645 flow [2024-06-27 21:25:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 377 transitions, 4605 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:07,364 INFO L231 Difference]: Finished difference. Result has 199 places, 324 transitions, 3852 flow [2024-06-27 21:25:07,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3852, PETRI_PLACES=199, PETRI_TRANSITIONS=324} [2024-06-27 21:25:07,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-27 21:25:07,365 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 324 transitions, 3852 flow [2024-06-27 21:25:07,365 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 21:25:07,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:07,365 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 21:25:07,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:25:07,366 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:07,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1285404832, now seen corresponding path program 2 times [2024-06-27 21:25:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529375665] [2024-06-27 21:25:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:07,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:11,430 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 21:25:11,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:11,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529375665] [2024-06-27 21:25:11,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529375665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:11,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:11,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045717751] [2024-06-27 21:25:11,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:11,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:11,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 324 transitions, 3852 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 21:25:11,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:11,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:11,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:15,404 INFO L124 PetriNetUnfolderBase]: 9448/13298 cut-off events. [2024-06-27 21:25:15,404 INFO L125 PetriNetUnfolderBase]: For 693411/693423 co-relation queries the response was YES. [2024-06-27 21:25:15,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104091 conditions, 13298 events. 9448/13298 cut-off events. For 693411/693423 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 73060 event pairs, 3020 based on Foata normal form. 10/13299 useless extension candidates. Maximal degree in co-relation 103999. Up to 12378 conditions per place. [2024-06-27 21:25:15,548 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 256 selfloop transitions, 128 changer transitions 0/390 dead transitions. [2024-06-27 21:25:15,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 390 transitions, 5434 flow [2024-06-27 21:25:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 21:25:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-27 21:25:15,550 INFO L175 Difference]: Start difference. First operand has 199 places, 324 transitions, 3852 flow. Second operand 8 states and 197 transitions. [2024-06-27 21:25:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 390 transitions, 5434 flow [2024-06-27 21:25:16,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 390 transitions, 5209 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:16,835 INFO L231 Difference]: Finished difference. Result has 201 places, 336 transitions, 4242 flow [2024-06-27 21:25:16,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4242, PETRI_PLACES=201, PETRI_TRANSITIONS=336} [2024-06-27 21:25:16,835 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-27 21:25:16,835 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 336 transitions, 4242 flow [2024-06-27 21:25:16,836 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 21:25:16,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:16,836 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 21:25:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:25:16,836 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:16,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1285135721, now seen corresponding path program 1 times [2024-06-27 21:25:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327700727] [2024-06-27 21:25:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327700727] [2024-06-27 21:25:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327700727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:20,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:20,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019976779] [2024-06-27 21:25:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:20,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:20,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 336 transitions, 4242 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 21:25:20,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:20,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:20,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:24,919 INFO L124 PetriNetUnfolderBase]: 9872/13855 cut-off events. [2024-06-27 21:25:24,920 INFO L125 PetriNetUnfolderBase]: For 773356/773368 co-relation queries the response was YES. [2024-06-27 21:25:24,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111774 conditions, 13855 events. 9872/13855 cut-off events. For 773356/773368 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76038 event pairs, 3020 based on Foata normal form. 16/13862 useless extension candidates. Maximal degree in co-relation 111681. Up to 12627 conditions per place. [2024-06-27 21:25:25,064 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 311 selfloop transitions, 134 changer transitions 0/451 dead transitions. [2024-06-27 21:25:25,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 451 transitions, 6476 flow [2024-06-27 21:25:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:25:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:25:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-27 21:25:25,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562937062937063 [2024-06-27 21:25:25,066 INFO L175 Difference]: Start difference. First operand has 201 places, 336 transitions, 4242 flow. Second operand 11 states and 261 transitions. [2024-06-27 21:25:25,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 451 transitions, 6476 flow [2024-06-27 21:25:26,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 451 transitions, 6239 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-27 21:25:26,559 INFO L231 Difference]: Finished difference. Result has 212 places, 374 transitions, 4904 flow [2024-06-27 21:25:26,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4904, PETRI_PLACES=212, PETRI_TRANSITIONS=374} [2024-06-27 21:25:26,560 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2024-06-27 21:25:26,560 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 374 transitions, 4904 flow [2024-06-27 21:25:26,560 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 21:25:26,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:26,560 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 21:25:26,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:25:26,561 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:26,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1285136062, now seen corresponding path program 3 times [2024-06-27 21:25:26,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:26,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735560179] [2024-06-27 21:25:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:26,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:30,044 INFO 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 21:25:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735560179] [2024-06-27 21:25:30,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735560179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:30,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:30,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:30,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094305640] [2024-06-27 21:25:30,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:30,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:30,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:30,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:30,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:30,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 374 transitions, 4904 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 21:25:30,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:30,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:30,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:34,307 INFO L124 PetriNetUnfolderBase]: 9891/13887 cut-off events. [2024-06-27 21:25:34,308 INFO L125 PetriNetUnfolderBase]: For 816161/816173 co-relation queries the response was YES. [2024-06-27 21:25:34,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116475 conditions, 13887 events. 9891/13887 cut-off events. For 816161/816173 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 76289 event pairs, 3065 based on Foata normal form. 10/13888 useless extension candidates. Maximal degree in co-relation 116377. Up to 12944 conditions per place. [2024-06-27 21:25:34,460 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 292 selfloop transitions, 130 changer transitions 0/428 dead transitions. [2024-06-27 21:25:34,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 428 transitions, 6308 flow [2024-06-27 21:25:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 21:25:34,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-27 21:25:34,462 INFO L175 Difference]: Start difference. First operand has 212 places, 374 transitions, 4904 flow. Second operand 8 states and 193 transitions. [2024-06-27 21:25:34,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 428 transitions, 6308 flow [2024-06-27 21:25:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 428 transitions, 6025 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:35,760 INFO L231 Difference]: Finished difference. Result has 215 places, 378 transitions, 4974 flow [2024-06-27 21:25:35,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4974, PETRI_PLACES=215, PETRI_TRANSITIONS=378} [2024-06-27 21:25:35,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-27 21:25:35,762 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 378 transitions, 4974 flow [2024-06-27 21:25:35,762 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 21:25:35,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:35,762 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 21:25:35,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:25:35,763 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:35,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:35,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1320837037, now seen corresponding path program 2 times [2024-06-27 21:25:35,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:35,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732844028] [2024-06-27 21:25:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:35,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:39,256 INFO 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 21:25:39,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:39,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732844028] [2024-06-27 21:25:39,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732844028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:39,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:39,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:39,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597569889] [2024-06-27 21:25:39,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:39,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:39,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:39,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:39,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 378 transitions, 4974 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 21:25:39,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:39,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:39,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:43,908 INFO L124 PetriNetUnfolderBase]: 10371/14553 cut-off events. [2024-06-27 21:25:43,908 INFO L125 PetriNetUnfolderBase]: For 892534/892537 co-relation queries the response was YES. [2024-06-27 21:25:44,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122908 conditions, 14553 events. 10371/14553 cut-off events. For 892534/892537 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 80153 event pairs, 3026 based on Foata normal form. 18/14567 useless extension candidates. Maximal degree in co-relation 122808. Up to 13131 conditions per place. [2024-06-27 21:25:44,093 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 357 selfloop transitions, 123 changer transitions 0/486 dead transitions. [2024-06-27 21:25:44,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 486 transitions, 7126 flow [2024-06-27 21:25:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:25:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:25:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-27 21:25:44,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-27 21:25:44,095 INFO L175 Difference]: Start difference. First operand has 215 places, 378 transitions, 4974 flow. Second operand 12 states and 285 transitions. [2024-06-27 21:25:44,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 486 transitions, 7126 flow [2024-06-27 21:25:45,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 486 transitions, 6915 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:45,559 INFO L231 Difference]: Finished difference. Result has 224 places, 405 transitions, 5559 flow [2024-06-27 21:25:45,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5559, PETRI_PLACES=224, PETRI_TRANSITIONS=405} [2024-06-27 21:25:45,560 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 169 predicate places. [2024-06-27 21:25:45,560 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 405 transitions, 5559 flow [2024-06-27 21:25:45,560 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 21:25:45,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:45,560 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 21:25:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:25:45,561 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:45,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1176738776, now seen corresponding path program 4 times [2024-06-27 21:25:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:45,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241584945] [2024-06-27 21:25:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:45,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:49,446 INFO 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 21:25:49,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:49,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241584945] [2024-06-27 21:25:49,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241584945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:49,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:49,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403760098] [2024-06-27 21:25:49,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:49,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:49,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 405 transitions, 5559 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 21:25:49,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:49,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:49,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:53,627 INFO L124 PetriNetUnfolderBase]: 10390/14603 cut-off events. [2024-06-27 21:25:53,627 INFO L125 PetriNetUnfolderBase]: For 937230/937233 co-relation queries the response was YES. [2024-06-27 21:25:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127146 conditions, 14603 events. 10390/14603 cut-off events. For 937230/937233 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80781 event pairs, 3135 based on Foata normal form. 4/14603 useless extension candidates. Maximal degree in co-relation 127044. Up to 13958 conditions per place. [2024-06-27 21:25:53,800 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 378 selfloop transitions, 68 changer transitions 0/452 dead transitions. [2024-06-27 21:25:53,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 452 transitions, 6675 flow [2024-06-27 21:25:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 21:25:53,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:25:53,801 INFO L175 Difference]: Start difference. First operand has 224 places, 405 transitions, 5559 flow. Second operand 8 states and 182 transitions. [2024-06-27 21:25:53,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 452 transitions, 6675 flow [2024-06-27 21:25:56,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 452 transitions, 6356 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:56,543 INFO L231 Difference]: Finished difference. Result has 227 places, 409 transitions, 5482 flow [2024-06-27 21:25:56,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5482, PETRI_PLACES=227, PETRI_TRANSITIONS=409} [2024-06-27 21:25:56,544 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 172 predicate places. [2024-06-27 21:25:56,544 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 409 transitions, 5482 flow [2024-06-27 21:25:56,544 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 21:25:56,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:56,544 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 21:25:56,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:25:56,545 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:56,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1137526121, now seen corresponding path program 3 times [2024-06-27 21:25:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:56,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916882190] [2024-06-27 21:25:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:00,464 INFO 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 21:26:00,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916882190] [2024-06-27 21:26:00,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916882190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:00,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:00,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:00,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949333623] [2024-06-27 21:26:00,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:00,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:00,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:00,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:26:00,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 409 transitions, 5482 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 21:26:00,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:00,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:26:00,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand