./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_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/safe001_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/safe001_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe001_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 20:49:24,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:49:24,392 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:49:24,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:49:24,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:49:24,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:49:24,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:49:24,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:49:24,417 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:49:24,417 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:49:24,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:49:24,418 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:49:24,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:49:24,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:49:24,419 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:49:24,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:49:24,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:49:24,420 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:49:24,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:49:24,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:49:24,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:49:24,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:49:24,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:49:24,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:49:24,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:49:24,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:49:24,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:49:24,423 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:49:24,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:49:24,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:49:24,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:49:24,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:49:24,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:49:24,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:49:24,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:49:24,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:49:24,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:49:24,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:49:24,426 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:49:24,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:49:24,427 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:49:24,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:49:24,427 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:49:24,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:49:24,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:49:24,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:49:24,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:49:24,667 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:49:24,668 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:49:24,668 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe001_power.oepc.yml/witness.yml [2024-06-27 20:49:24,873 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:49:24,873 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:49:24,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-27 20:49:26,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:49:26,245 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:49:26,246 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-27 20:49:26,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c016d6c40/24a14ba92d9e43369a5f168f8ad675c7/FLAG0beaabb9e [2024-06-27 20:49:26,295 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c016d6c40/24a14ba92d9e43369a5f168f8ad675c7 [2024-06-27 20:49:26,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:49:26,297 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:49:26,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:49:26,303 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:49:26,307 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:49:26,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:49:24" (1/2) ... [2024-06-27 20:49:26,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1fe3bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:49:26, skipping insertion in model container [2024-06-27 20:49:26,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:49:24" (1/2) ... [2024-06-27 20:49:26,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@102cf68b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:49:26, skipping insertion in model container [2024-06-27 20:49:26,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:49:26" (2/2) ... [2024-06-27 20:49:26,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1fe3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:26, skipping insertion in model container [2024-06-27 20:49:26,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:49:26" (2/2) ... [2024-06-27 20:49:26,317 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:49:26,447 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:49:26,448 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! 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$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:49:26,448 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$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$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:49:26,449 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! 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$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:49:26,449 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:49:26,449 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-27 20:49:26,488 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:49:26,853 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:49:26,861 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:49:26,976 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:49:27,006 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:49:27,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27 WrapperNode [2024-06-27 20:49:27,006 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:49:27,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:49:27,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:49:27,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:49:27,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,084 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 228 [2024-06-27 20:49:27,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:49:27,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:49:27,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:49:27,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:49:27,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,116 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,131 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 11 writes are split as follows [0, 11]. [2024-06-27 20:49:27,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,144 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,175 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:49:27,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:49:27,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:49:27,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:49:27,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (1/1) ... [2024-06-27 20:49:27,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:49:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:49:27,226 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 20:49:27,245 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 20:49:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 20:49:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 20:49:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 20:49:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 20:49:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:49:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:49:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:49:27,265 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:49:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:49:27,266 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:49:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:49:27,266 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:49:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:49:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 20:49:27,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:49:27,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:49:27,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:49:27,270 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 20:49:27,418 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:49:27,420 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:49:27,909 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:49:27,920 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:49:28,287 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:49:28,287 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:49:28,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:49:28 BoogieIcfgContainer [2024-06-27 20:49:28,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:49:28,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:49:28,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:49:28,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:49:28,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:49:24" (1/4) ... [2024-06-27 20:49:28,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a17bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:49:28, skipping insertion in model container [2024-06-27 20:49:28,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:49:26" (2/4) ... [2024-06-27 20:49:28,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a17bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:49:28, skipping insertion in model container [2024-06-27 20:49:28,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:49:27" (3/4) ... [2024-06-27 20:49:28,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a17bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:49:28, skipping insertion in model container [2024-06-27 20:49:28,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:49:28" (4/4) ... [2024-06-27 20:49:28,295 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2024-06-27 20:49:28,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:49:28,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:49:28,309 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:49:28,395 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:49:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:49:28,452 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:49:28,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:49:28,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:49:28,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:49:28,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:49:28,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:49:28,473 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;@1f7ae872, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:49:28,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:49:28,478 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:49:28,478 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:49:28,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:49:28,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:28,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:49:28,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:28,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash 898592787, now seen corresponding path program 1 times [2024-06-27 20:49:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:28,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700058426] [2024-06-27 20:49:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:30,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700058426] [2024-06-27 20:49:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700058426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:30,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:30,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:49:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135707836] [2024-06-27 20:49:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:30,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:49:30,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:49:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:49:30,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:30,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:30,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:30,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:30,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:30,679 INFO L124 PetriNetUnfolderBase]: 1409/2137 cut-off events. [2024-06-27 20:49:30,680 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:49:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2137 events. 1409/2137 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10054 event pairs, 873 based on Foata normal form. 2/2104 useless extension candidates. Maximal degree in co-relation 4323. Up to 2108 conditions per place. [2024-06-27 20:49:30,694 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 20:49:30,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-06-27 20:49:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:49:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:49:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-27 20:49:30,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-27 20:49:30,704 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 68 transitions. [2024-06-27 20:49:30,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-06-27 20:49:30,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:49:30,708 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:49:30,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:49:30,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:49:30,712 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:49:30,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:30,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:30,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:30,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:49:30,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:30,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:30,731 INFO L85 PathProgramCache]: Analyzing trace with hash 259287570, now seen corresponding path program 1 times [2024-06-27 20:49:30,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:30,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198245574] [2024-06-27 20:49:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:32,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198245574] [2024-06-27 20:49:32,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198245574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:32,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:32,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:49:32,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423952196] [2024-06-27 20:49:32,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:49:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:49:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:49:32,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:32,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:32,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:32,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:32,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:33,513 INFO L124 PetriNetUnfolderBase]: 1400/2124 cut-off events. [2024-06-27 20:49:33,513 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-06-27 20:49:33,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4874 conditions, 2124 events. 1400/2124 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10042 event pairs, 726 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 4862. Up to 2071 conditions per place. [2024-06-27 20:49:33,523 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 20:49:33,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 268 flow [2024-06-27 20:49:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:49:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:49:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 20:49:33,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-27 20:49:33,525 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-27 20:49:33,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 268 flow [2024-06-27 20:49:33,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:49:33,527 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:49:33,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:49:33,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:49:33,528 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:49:33,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:33,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:33,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:33,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:49:33,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:33,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash -552018431, now seen corresponding path program 1 times [2024-06-27 20:49:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:33,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936374511] [2024-06-27 20:49:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:33,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:35,563 INFO 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 20:49:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936374511] [2024-06-27 20:49:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936374511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:35,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:49:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277747589] [2024-06-27 20:49:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:35,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:49:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:49:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:49:35,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:35,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:35,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:35,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:35,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:36,466 INFO L124 PetriNetUnfolderBase]: 1414/2157 cut-off events. [2024-06-27 20:49:36,466 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-27 20:49:36,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2157 events. 1414/2157 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10309 event pairs, 512 based on Foata normal form. 7/2163 useless extension candidates. Maximal degree in co-relation 5463. Up to 1977 conditions per place. [2024-06-27 20:49:36,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-27 20:49:36,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 434 flow [2024-06-27 20:49:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:49:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:49:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 20:49:36,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-27 20:49:36,482 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 118 transitions. [2024-06-27 20:49:36,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 434 flow [2024-06-27 20:49:36,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 420 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:49:36,486 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:49:36,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 20:49:36,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:49:36,487 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:49:36,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:36,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:36,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:36,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:49:36,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:36,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1225622780, now seen corresponding path program 1 times [2024-06-27 20:49:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:36,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344076035] [2024-06-27 20:49:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:38,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:38,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344076035] [2024-06-27 20:49:38,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344076035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:39,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:39,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:49:39,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83281787] [2024-06-27 20:49:39,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:49:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:49:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:49:39,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:39,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:39,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:39,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:39,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:40,118 INFO L124 PetriNetUnfolderBase]: 1435/2192 cut-off events. [2024-06-27 20:49:40,119 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2024-06-27 20:49:40,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 2192 events. 1435/2192 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10523 event pairs, 349 based on Foata normal form. 14/2205 useless extension candidates. Maximal degree in co-relation 6574. Up to 1924 conditions per place. [2024-06-27 20:49:40,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-27 20:49:40,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 545 flow [2024-06-27 20:49:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:49:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:49:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 20:49:40,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 20:49:40,136 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 135 transitions. [2024-06-27 20:49:40,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 545 flow [2024-06-27 20:49:40,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 537 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:49:40,143 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-27 20:49:40,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-27 20:49:40,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:49:40,145 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-27 20:49:40,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:40,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:40,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:40,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:49:40,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:40,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1990223194, now seen corresponding path program 1 times [2024-06-27 20:49:40,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:40,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668970046] [2024-06-27 20:49:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:40,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:41,434 INFO 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 20:49:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668970046] [2024-06-27 20:49:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668970046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:41,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:49:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618033014] [2024-06-27 20:49:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:49:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:49:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:49:41,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:41,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:41,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:42,266 INFO L124 PetriNetUnfolderBase]: 1427/2180 cut-off events. [2024-06-27 20:49:42,266 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-27 20:49:42,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2180 events. 1427/2180 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10472 event pairs, 503 based on Foata normal form. 3/2182 useless extension candidates. Maximal degree in co-relation 7136. Up to 2124 conditions per place. [2024-06-27 20:49:42,277 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 56 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-27 20:49:42,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 459 flow [2024-06-27 20:49:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:49:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:49:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 20:49:42,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:49:42,279 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 87 transitions. [2024-06-27 20:49:42,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 459 flow [2024-06-27 20:49:42,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 409 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:42,282 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-27 20:49:42,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 20:49:42,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:49:42,283 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-27 20:49:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:42,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:42,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:42,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:49:42,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:42,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1605229223, now seen corresponding path program 1 times [2024-06-27 20:49:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:42,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355459677] [2024-06-27 20:49:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:43,890 INFO 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 20:49:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:43,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355459677] [2024-06-27 20:49:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355459677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:43,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:43,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:49:43,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561716082] [2024-06-27 20:49:43,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:43,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:49:43,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:43,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:49:43,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:49:43,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:43,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:43,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:43,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:43,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:44,933 INFO L124 PetriNetUnfolderBase]: 1417/2162 cut-off events. [2024-06-27 20:49:44,933 INFO L125 PetriNetUnfolderBase]: For 4523/4523 co-relation queries the response was YES. [2024-06-27 20:49:44,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2162 events. 1417/2162 cut-off events. For 4523/4523 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10136 event pairs, 551 based on Foata normal form. 4/2165 useless extension candidates. Maximal degree in co-relation 7056. Up to 2096 conditions per place. [2024-06-27 20:49:44,946 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 20:49:44,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 521 flow [2024-06-27 20:49:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:49:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:49:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:49:44,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:49:44,948 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:49:44,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 521 flow [2024-06-27 20:49:44,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 489 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:44,952 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 339 flow [2024-06-27 20:49:44,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-27 20:49:44,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 20:49:44,955 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 339 flow [2024-06-27 20:49:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:44,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:49:44,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:44,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1771781251, now seen corresponding path program 1 times [2024-06-27 20:49:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621869732] [2024-06-27 20:49:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:47,105 INFO 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 20:49:47,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621869732] [2024-06-27 20:49:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621869732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:47,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:47,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:49:47,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761907911] [2024-06-27 20:49:47,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:47,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:49:47,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:49:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:49:47,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:47,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:47,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:47,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:47,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:48,231 INFO L124 PetriNetUnfolderBase]: 1427/2178 cut-off events. [2024-06-27 20:49:48,231 INFO L125 PetriNetUnfolderBase]: For 5853/5855 co-relation queries the response was YES. [2024-06-27 20:49:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 2178 events. 1427/2178 cut-off events. For 5853/5855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10345 event pairs, 496 based on Foata normal form. 8/2185 useless extension candidates. Maximal degree in co-relation 7656. Up to 1997 conditions per place. [2024-06-27 20:49:48,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-27 20:49:48,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 627 flow [2024-06-27 20:49:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:49:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:49:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:49:48,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-27 20:49:48,247 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 339 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:49:48,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 627 flow [2024-06-27 20:49:48,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 621 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 20:49:48,252 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 411 flow [2024-06-27 20:49:48,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 20:49:48,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 20:49:48,252 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 411 flow [2024-06-27 20:49:48,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:48,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:48,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:49:48,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:48,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1344004635, now seen corresponding path program 2 times [2024-06-27 20:49:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:48,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390403586] [2024-06-27 20:49:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:50,145 INFO 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 20:49:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390403586] [2024-06-27 20:49:50,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390403586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:50,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:50,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:49:50,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727839705] [2024-06-27 20:49:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:49:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:49:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:49:50,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:50,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:50,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:50,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:50,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:51,106 INFO L124 PetriNetUnfolderBase]: 1407/2136 cut-off events. [2024-06-27 20:49:51,106 INFO L125 PetriNetUnfolderBase]: For 7168/7168 co-relation queries the response was YES. [2024-06-27 20:49:51,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 2136 events. 1407/2136 cut-off events. For 7168/7168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10039 event pairs, 514 based on Foata normal form. 3/2137 useless extension candidates. Maximal degree in co-relation 7846. Up to 1973 conditions per place. [2024-06-27 20:49:51,117 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-27 20:49:51,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 633 flow [2024-06-27 20:49:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:49:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:49:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:49:51,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:49:51,121 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 411 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:49:51,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 633 flow [2024-06-27 20:49:51,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 600 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:49:51,127 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 433 flow [2024-06-27 20:49:51,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-27 20:49:51,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-27 20:49:51,128 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 433 flow [2024-06-27 20:49:51,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:51,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:51,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:51,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:49:51,128 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:51,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2032757366, now seen corresponding path program 1 times [2024-06-27 20:49:51,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:51,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28185413] [2024-06-27 20:49:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:52,899 INFO 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 20:49:52,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:52,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28185413] [2024-06-27 20:49:52,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28185413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:52,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:52,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:49:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117465469] [2024-06-27 20:49:52,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:52,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:49:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:49:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:49:52,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:52,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:52,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:52,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:52,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:54,654 INFO L124 PetriNetUnfolderBase]: 2219/3316 cut-off events. [2024-06-27 20:49:54,654 INFO L125 PetriNetUnfolderBase]: For 12825/12827 co-relation queries the response was YES. [2024-06-27 20:49:54,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12394 conditions, 3316 events. 2219/3316 cut-off events. For 12825/12827 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16105 event pairs, 571 based on Foata normal form. 22/3337 useless extension candidates. Maximal degree in co-relation 12365. Up to 2314 conditions per place. [2024-06-27 20:49:54,672 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-27 20:49:54,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 171 transitions, 1314 flow [2024-06-27 20:49:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:49:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-27 20:49:54,677 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 433 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:49:54,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 171 transitions, 1314 flow [2024-06-27 20:49:54,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 1179 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:54,690 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 776 flow [2024-06-27 20:49:54,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=776, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-27 20:49:54,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 20:49:54,690 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 776 flow [2024-06-27 20:49:54,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:54,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:54,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:54,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:49:54,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:54,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -909354630, now seen corresponding path program 2 times [2024-06-27 20:49:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:54,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399991253] [2024-06-27 20:49:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:56,989 INFO 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 20:49:56,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399991253] [2024-06-27 20:49:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399991253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:56,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:56,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:49:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278876628] [2024-06-27 20:49:56,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:56,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:49:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:49:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:49:57,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:57,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:57,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:57,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:57,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:58,326 INFO L124 PetriNetUnfolderBase]: 2651/3944 cut-off events. [2024-06-27 20:49:58,326 INFO L125 PetriNetUnfolderBase]: For 20806/20810 co-relation queries the response was YES. [2024-06-27 20:49:58,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17603 conditions, 3944 events. 2651/3944 cut-off events. For 20806/20810 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19660 event pairs, 590 based on Foata normal form. 38/3981 useless extension candidates. Maximal degree in co-relation 17567. Up to 2554 conditions per place. [2024-06-27 20:49:58,352 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 90 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-27 20:49:58,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 1486 flow [2024-06-27 20:49:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:49:58,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:49:58,365 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 776 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:49:58,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 1486 flow [2024-06-27 20:49:58,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1443 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 20:49:58,387 INFO L231 Difference]: Finished difference. Result has 89 places, 121 transitions, 1106 flow [2024-06-27 20:49:58,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=121} [2024-06-27 20:49:58,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 20:49:58,388 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 121 transitions, 1106 flow [2024-06-27 20:49:58,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:58,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:58,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:58,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:49:58,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:58,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1316811262, now seen corresponding path program 3 times [2024-06-27 20:49:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807744012] [2024-06-27 20:49:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:00,791 INFO 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 20:50:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807744012] [2024-06-27 20:50:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807744012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:00,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:00,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:00,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978460229] [2024-06-27 20:50:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:00,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:00,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:00,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 1106 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:00,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:00,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:00,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:02,141 INFO L124 PetriNetUnfolderBase]: 2679/3984 cut-off events. [2024-06-27 20:50:02,141 INFO L125 PetriNetUnfolderBase]: For 27431/27433 co-relation queries the response was YES. [2024-06-27 20:50:02,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20278 conditions, 3984 events. 2679/3984 cut-off events. For 27431/27433 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19795 event pairs, 682 based on Foata normal form. 18/4000 useless extension candidates. Maximal degree in co-relation 20238. Up to 3501 conditions per place. [2024-06-27 20:50:02,165 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 113 selfloop transitions, 52 changer transitions 0/169 dead transitions. [2024-06-27 20:50:02,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 169 transitions, 1720 flow [2024-06-27 20:50:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:50:02,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:50:02,167 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 1106 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:50:02,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 169 transitions, 1720 flow [2024-06-27 20:50:02,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 169 transitions, 1593 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:02,210 INFO L231 Difference]: Finished difference. Result has 93 places, 135 transitions, 1265 flow [2024-06-27 20:50:02,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=93, PETRI_TRANSITIONS=135} [2024-06-27 20:50:02,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-27 20:50:02,211 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 135 transitions, 1265 flow [2024-06-27 20:50:02,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:02,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:02,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:02,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:50:02,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:02,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -731985960, now seen corresponding path program 4 times [2024-06-27 20:50:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850844423] [2024-06-27 20:50:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:04,186 INFO 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 20:50:04,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850844423] [2024-06-27 20:50:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850844423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:04,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:04,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:04,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699637515] [2024-06-27 20:50:04,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:04,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:04,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:04,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:04,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 135 transitions, 1265 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:04,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:04,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:04,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:05,685 INFO L124 PetriNetUnfolderBase]: 2669/3951 cut-off events. [2024-06-27 20:50:05,685 INFO L125 PetriNetUnfolderBase]: For 30673/30675 co-relation queries the response was YES. [2024-06-27 20:50:05,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20239 conditions, 3951 events. 2669/3951 cut-off events. For 30673/30675 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19246 event pairs, 680 based on Foata normal form. 4/3953 useless extension candidates. Maximal degree in co-relation 20197. Up to 3377 conditions per place. [2024-06-27 20:50:05,709 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 55 changer transitions 0/208 dead transitions. [2024-06-27 20:50:05,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 208 transitions, 2261 flow [2024-06-27 20:50:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:50:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:50:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:50:05,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 20:50:05,711 INFO L175 Difference]: Start difference. First operand has 93 places, 135 transitions, 1265 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:50:05,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 208 transitions, 2261 flow [2024-06-27 20:50:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 208 transitions, 2080 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:05,753 INFO L231 Difference]: Finished difference. Result has 98 places, 174 transitions, 1759 flow [2024-06-27 20:50:05,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=98, PETRI_TRANSITIONS=174} [2024-06-27 20:50:05,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:50:05,754 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 174 transitions, 1759 flow [2024-06-27 20:50:05,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:05,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:05,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:50:05,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:05,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 122140330, now seen corresponding path program 1 times [2024-06-27 20:50:05,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:05,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369614443] [2024-06-27 20:50:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:08,251 INFO 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 20:50:08,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369614443] [2024-06-27 20:50:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369614443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:08,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:08,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706161536] [2024-06-27 20:50:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:08,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:08,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:08,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 174 transitions, 1759 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:08,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:08,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:08,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:09,523 INFO L124 PetriNetUnfolderBase]: 2661/3955 cut-off events. [2024-06-27 20:50:09,524 INFO L125 PetriNetUnfolderBase]: For 32459/32461 co-relation queries the response was YES. [2024-06-27 20:50:09,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20934 conditions, 3955 events. 2661/3955 cut-off events. For 32459/32461 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19428 event pairs, 782 based on Foata normal form. 4/3958 useless extension candidates. Maximal degree in co-relation 20888. Up to 3825 conditions per place. [2024-06-27 20:50:09,546 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-06-27 20:50:09,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 202 transitions, 2255 flow [2024-06-27 20:50:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:50:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:50:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:50:09,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:50:09,548 INFO L175 Difference]: Start difference. First operand has 98 places, 174 transitions, 1759 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:50:09,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 202 transitions, 2255 flow [2024-06-27 20:50:09,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 202 transitions, 2225 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 20:50:09,592 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 1786 flow [2024-06-27 20:50:09,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1786, PETRI_PLACES=104, PETRI_TRANSITIONS=176} [2024-06-27 20:50:09,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 20:50:09,593 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 1786 flow [2024-06-27 20:50:09,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:09,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:09,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:50:09,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:09,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1129540423, now seen corresponding path program 1 times [2024-06-27 20:50:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255875551] [2024-06-27 20:50:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:09,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255875551] [2024-06-27 20:50:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255875551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:12,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:12,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:12,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365910418] [2024-06-27 20:50:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:12,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:12,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 176 transitions, 1786 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:12,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:12,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:12,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:13,456 INFO L124 PetriNetUnfolderBase]: 2853/4268 cut-off events. [2024-06-27 20:50:13,457 INFO L125 PetriNetUnfolderBase]: For 39018/39026 co-relation queries the response was YES. [2024-06-27 20:50:13,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22822 conditions, 4268 events. 2853/4268 cut-off events. For 39018/39026 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21702 event pairs, 611 based on Foata normal form. 26/4293 useless extension candidates. Maximal degree in co-relation 22773. Up to 2695 conditions per place. [2024-06-27 20:50:13,488 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 125 changer transitions 0/237 dead transitions. [2024-06-27 20:50:13,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 237 transitions, 2717 flow [2024-06-27 20:50:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:50:13,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:50:13,490 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 1786 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:50:13,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 237 transitions, 2717 flow [2024-06-27 20:50:13,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2682 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:13,543 INFO L231 Difference]: Finished difference. Result has 108 places, 197 transitions, 2315 flow [2024-06-27 20:50:13,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2315, PETRI_PLACES=108, PETRI_TRANSITIONS=197} [2024-06-27 20:50:13,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:50:13,544 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 197 transitions, 2315 flow [2024-06-27 20:50:13,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:13,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:13,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:13,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:50:13,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:13,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -719714125, now seen corresponding path program 2 times [2024-06-27 20:50:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:13,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027557759] [2024-06-27 20:50:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:13,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:15,722 INFO 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 20:50:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027557759] [2024-06-27 20:50:15,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027557759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:15,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:15,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656880188] [2024-06-27 20:50:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:15,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:15,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:15,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:15,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 197 transitions, 2315 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:15,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:15,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:15,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:17,184 INFO L124 PetriNetUnfolderBase]: 2813/4228 cut-off events. [2024-06-27 20:50:17,184 INFO L125 PetriNetUnfolderBase]: For 45879/45891 co-relation queries the response was YES. [2024-06-27 20:50:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24198 conditions, 4228 events. 2813/4228 cut-off events. For 45879/45891 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21578 event pairs, 690 based on Foata normal form. 32/4259 useless extension candidates. Maximal degree in co-relation 24147. Up to 2673 conditions per place. [2024-06-27 20:50:17,212 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 115 selfloop transitions, 137 changer transitions 0/256 dead transitions. [2024-06-27 20:50:17,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 256 transitions, 3137 flow [2024-06-27 20:50:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:50:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:50:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:50:17,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 20:50:17,226 INFO L175 Difference]: Start difference. First operand has 108 places, 197 transitions, 2315 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:50:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 256 transitions, 3137 flow [2024-06-27 20:50:17,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 256 transitions, 3005 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 20:50:17,317 INFO L231 Difference]: Finished difference. Result has 116 places, 202 transitions, 2659 flow [2024-06-27 20:50:17,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2659, PETRI_PLACES=116, PETRI_TRANSITIONS=202} [2024-06-27 20:50:17,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:50:17,317 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 202 transitions, 2659 flow [2024-06-27 20:50:17,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:17,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:17,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:17,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:50:17,318 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:17,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1204099309, now seen corresponding path program 3 times [2024-06-27 20:50:17,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258769147] [2024-06-27 20:50:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:19,444 INFO 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 20:50:19,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258769147] [2024-06-27 20:50:19,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258769147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:19,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:19,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:19,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288717950] [2024-06-27 20:50:19,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:19,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:19,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:19,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:19,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 202 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:19,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:19,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:19,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:20,971 INFO L124 PetriNetUnfolderBase]: 2803/4202 cut-off events. [2024-06-27 20:50:20,971 INFO L125 PetriNetUnfolderBase]: For 51450/51466 co-relation queries the response was YES. [2024-06-27 20:50:20,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26170 conditions, 4202 events. 2803/4202 cut-off events. For 51450/51466 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21147 event pairs, 712 based on Foata normal form. 13/4213 useless extension candidates. Maximal degree in co-relation 26115. Up to 3557 conditions per place. [2024-06-27 20:50:20,999 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 53 changer transitions 0/233 dead transitions. [2024-06-27 20:50:21,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 233 transitions, 3252 flow [2024-06-27 20:50:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:50:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:50:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:50:21,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:50:21,002 INFO L175 Difference]: Start difference. First operand has 116 places, 202 transitions, 2659 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:50:21,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 233 transitions, 3252 flow [2024-06-27 20:50:21,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 233 transitions, 2979 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:21,124 INFO L231 Difference]: Finished difference. Result has 117 places, 205 transitions, 2569 flow [2024-06-27 20:50:21,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2569, PETRI_PLACES=117, PETRI_TRANSITIONS=205} [2024-06-27 20:50:21,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-27 20:50:21,141 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 205 transitions, 2569 flow [2024-06-27 20:50:21,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:21,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:21,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:21,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:50:21,142 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:21,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash 62028631, now seen corresponding path program 1 times [2024-06-27 20:50:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:21,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347306332] [2024-06-27 20:50:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:23,904 INFO 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 20:50:23,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347306332] [2024-06-27 20:50:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347306332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:23,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:23,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128709769] [2024-06-27 20:50:23,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:23,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:23,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 205 transitions, 2569 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:23,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:23,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:23,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:25,228 INFO L124 PetriNetUnfolderBase]: 2831/4246 cut-off events. [2024-06-27 20:50:25,229 INFO L125 PetriNetUnfolderBase]: For 53859/53867 co-relation queries the response was YES. [2024-06-27 20:50:25,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25913 conditions, 4246 events. 2831/4246 cut-off events. For 53859/53867 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21657 event pairs, 571 based on Foata normal form. 12/4257 useless extension candidates. Maximal degree in co-relation 25857. Up to 3688 conditions per place. [2024-06-27 20:50:25,258 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 50 changer transitions 0/242 dead transitions. [2024-06-27 20:50:25,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 242 transitions, 3281 flow [2024-06-27 20:50:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:50:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:50:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:50:25,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:50:25,260 INFO L175 Difference]: Start difference. First operand has 117 places, 205 transitions, 2569 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:50:25,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 242 transitions, 3281 flow [2024-06-27 20:50:25,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 242 transitions, 3221 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:50:25,342 INFO L231 Difference]: Finished difference. Result has 121 places, 209 transitions, 2676 flow [2024-06-27 20:50:25,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2676, PETRI_PLACES=121, PETRI_TRANSITIONS=209} [2024-06-27 20:50:25,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 20:50:25,343 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 209 transitions, 2676 flow [2024-06-27 20:50:25,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:25,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:50:25,344 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:25,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2129663713, now seen corresponding path program 2 times [2024-06-27 20:50:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706760456] [2024-06-27 20:50:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:27,722 INFO 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 20:50:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:27,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706760456] [2024-06-27 20:50:27,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706760456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:27,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:27,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:50:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826721789] [2024-06-27 20:50:27,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:27,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:50:27,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:27,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:50:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:50:27,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:27,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 209 transitions, 2676 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:27,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:27,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:27,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:29,107 INFO L124 PetriNetUnfolderBase]: 2818/4221 cut-off events. [2024-06-27 20:50:29,107 INFO L125 PetriNetUnfolderBase]: For 58199/58203 co-relation queries the response was YES. [2024-06-27 20:50:29,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25995 conditions, 4221 events. 2818/4221 cut-off events. For 58199/58203 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21380 event pairs, 746 based on Foata normal form. 8/4228 useless extension candidates. Maximal degree in co-relation 25937. Up to 3818 conditions per place. [2024-06-27 20:50:29,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 57 changer transitions 0/240 dead transitions. [2024-06-27 20:50:29,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 240 transitions, 3263 flow [2024-06-27 20:50:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:50:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:50:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:50:29,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 20:50:29,141 INFO L175 Difference]: Start difference. First operand has 121 places, 209 transitions, 2676 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:50:29,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 240 transitions, 3263 flow [2024-06-27 20:50:29,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 240 transitions, 3175 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:50:29,238 INFO L231 Difference]: Finished difference. Result has 125 places, 209 transitions, 2714 flow [2024-06-27 20:50:29,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2714, PETRI_PLACES=125, PETRI_TRANSITIONS=209} [2024-06-27 20:50:29,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-27 20:50:29,238 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 209 transitions, 2714 flow [2024-06-27 20:50:29,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:29,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:29,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:50:29,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:29,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2011391335, now seen corresponding path program 1 times [2024-06-27 20:50:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974825585] [2024-06-27 20:50:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:29,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:32,547 INFO 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 20:50:32,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:32,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974825585] [2024-06-27 20:50:32,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974825585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:32,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:32,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165660966] [2024-06-27 20:50:32,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:32,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:32,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:32,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 209 transitions, 2714 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:32,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:32,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:32,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:34,156 INFO L124 PetriNetUnfolderBase]: 3218/4879 cut-off events. [2024-06-27 20:50:34,157 INFO L125 PetriNetUnfolderBase]: For 79649/79653 co-relation queries the response was YES. [2024-06-27 20:50:34,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28751 conditions, 4879 events. 3218/4879 cut-off events. For 79649/79653 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25848 event pairs, 698 based on Foata normal form. 94/4972 useless extension candidates. Maximal degree in co-relation 28691. Up to 2588 conditions per place. [2024-06-27 20:50:34,188 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 122 selfloop transitions, 143 changer transitions 0/269 dead transitions. [2024-06-27 20:50:34,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 269 transitions, 3551 flow [2024-06-27 20:50:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:50:34,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-27 20:50:34,190 INFO L175 Difference]: Start difference. First operand has 125 places, 209 transitions, 2714 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:50:34,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 269 transitions, 3551 flow [2024-06-27 20:50:34,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 269 transitions, 3426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:34,284 INFO L231 Difference]: Finished difference. Result has 129 places, 212 transitions, 2951 flow [2024-06-27 20:50:34,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2951, PETRI_PLACES=129, PETRI_TRANSITIONS=212} [2024-06-27 20:50:34,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 20:50:34,285 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 212 transitions, 2951 flow [2024-06-27 20:50:34,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:34,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:34,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:34,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:50:34,286 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:34,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1555520009, now seen corresponding path program 2 times [2024-06-27 20:50:34,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:34,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519966962] [2024-06-27 20:50:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:37,407 INFO 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 20:50:37,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:37,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519966962] [2024-06-27 20:50:37,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519966962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:37,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:37,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549690821] [2024-06-27 20:50:37,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:37,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:37,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 212 transitions, 2951 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:37,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:37,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:37,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:39,023 INFO L124 PetriNetUnfolderBase]: 3306/5027 cut-off events. [2024-06-27 20:50:39,023 INFO L125 PetriNetUnfolderBase]: For 78810/78812 co-relation queries the response was YES. [2024-06-27 20:50:39,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31074 conditions, 5027 events. 3306/5027 cut-off events. For 78810/78812 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26759 event pairs, 887 based on Foata normal form. 18/5043 useless extension candidates. Maximal degree in co-relation 31013. Up to 4392 conditions per place. [2024-06-27 20:50:39,057 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 177 selfloop transitions, 77 changer transitions 0/258 dead transitions. [2024-06-27 20:50:39,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 258 transitions, 3692 flow [2024-06-27 20:50:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:50:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:50:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:50:39,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:50:39,059 INFO L175 Difference]: Start difference. First operand has 129 places, 212 transitions, 2951 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:50:39,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 258 transitions, 3692 flow [2024-06-27 20:50:39,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 258 transitions, 3388 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:50:39,179 INFO L231 Difference]: Finished difference. Result has 130 places, 215 transitions, 2874 flow [2024-06-27 20:50:39,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2874, PETRI_PLACES=130, PETRI_TRANSITIONS=215} [2024-06-27 20:50:39,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 20:50:39,179 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 215 transitions, 2874 flow [2024-06-27 20:50:39,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:39,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:39,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:39,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:50:39,181 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:39,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash 936175991, now seen corresponding path program 3 times [2024-06-27 20:50:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634060921] [2024-06-27 20:50:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634060921] [2024-06-27 20:50:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634060921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634767836] [2024-06-27 20:50:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:42,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:42,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 215 transitions, 2874 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:42,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:42,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:42,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:44,082 INFO L124 PetriNetUnfolderBase]: 3326/5043 cut-off events. [2024-06-27 20:50:44,082 INFO L125 PetriNetUnfolderBase]: For 76848/76850 co-relation queries the response was YES. [2024-06-27 20:50:44,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30537 conditions, 5043 events. 3326/5043 cut-off events. For 76848/76850 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26612 event pairs, 868 based on Foata normal form. 4/5045 useless extension candidates. Maximal degree in co-relation 30475. Up to 4396 conditions per place. [2024-06-27 20:50:44,125 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 64 changer transitions 0/253 dead transitions. [2024-06-27 20:50:44,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 253 transitions, 3526 flow [2024-06-27 20:50:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:50:44,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:50:44,128 INFO L175 Difference]: Start difference. First operand has 130 places, 215 transitions, 2874 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:50:44,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 253 transitions, 3526 flow [2024-06-27 20:50:44,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 253 transitions, 3337 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:44,250 INFO L231 Difference]: Finished difference. Result has 131 places, 217 transitions, 2860 flow [2024-06-27 20:50:44,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2860, PETRI_PLACES=131, PETRI_TRANSITIONS=217} [2024-06-27 20:50:44,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-27 20:50:44,250 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 217 transitions, 2860 flow [2024-06-27 20:50:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:44,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:44,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:50:44,251 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:44,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1412778217, now seen corresponding path program 4 times [2024-06-27 20:50:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:44,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542714646] [2024-06-27 20:50:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:47,014 INFO 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 20:50:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542714646] [2024-06-27 20:50:47,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542714646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:47,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:47,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:47,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249743536] [2024-06-27 20:50:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:47,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:47,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:47,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:47,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:47,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 217 transitions, 2860 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:47,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:47,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:47,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:48,549 INFO L124 PetriNetUnfolderBase]: 3318/5039 cut-off events. [2024-06-27 20:50:48,549 INFO L125 PetriNetUnfolderBase]: For 79638/79640 co-relation queries the response was YES. [2024-06-27 20:50:48,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30356 conditions, 5039 events. 3318/5039 cut-off events. For 79638/79640 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26684 event pairs, 821 based on Foata normal form. 4/5041 useless extension candidates. Maximal degree in co-relation 30293. Up to 4100 conditions per place. [2024-06-27 20:50:48,586 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-27 20:50:48,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 261 transitions, 3560 flow [2024-06-27 20:50:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:50:48,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:50:48,588 INFO L175 Difference]: Start difference. First operand has 131 places, 217 transitions, 2860 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:50:48,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 261 transitions, 3560 flow [2024-06-27 20:50:48,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 261 transitions, 3405 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:48,702 INFO L231 Difference]: Finished difference. Result has 134 places, 221 transitions, 2928 flow [2024-06-27 20:50:48,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2928, PETRI_PLACES=134, PETRI_TRANSITIONS=221} [2024-06-27 20:50:48,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 20:50:48,702 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 221 transitions, 2928 flow [2024-06-27 20:50:48,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:48,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:48,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:50:48,703 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:48,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash 661302518, now seen corresponding path program 1 times [2024-06-27 20:50:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101402527] [2024-06-27 20:50:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:50,539 INFO 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 20:50:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101402527] [2024-06-27 20:50:50,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101402527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:50,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:50,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:50:50,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265279075] [2024-06-27 20:50:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:50:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:50:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:50:50,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:50,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 221 transitions, 2928 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:50,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:50,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:50,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:51,711 INFO L124 PetriNetUnfolderBase]: 3312/5048 cut-off events. [2024-06-27 20:50:51,712 INFO L125 PetriNetUnfolderBase]: For 83868/83870 co-relation queries the response was YES. [2024-06-27 20:50:51,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30778 conditions, 5048 events. 3312/5048 cut-off events. For 83868/83870 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27119 event pairs, 1028 based on Foata normal form. 2/5049 useless extension candidates. Maximal degree in co-relation 30713. Up to 4918 conditions per place. [2024-06-27 20:50:51,752 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 221 selfloop transitions, 10 changer transitions 0/235 dead transitions. [2024-06-27 20:50:51,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 3450 flow [2024-06-27 20:50:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:50:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:50:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-27 20:50:51,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 20:50:51,754 INFO L175 Difference]: Start difference. First operand has 134 places, 221 transitions, 2928 flow. Second operand 5 states and 82 transitions. [2024-06-27 20:50:51,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 3450 flow [2024-06-27 20:50:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 3295 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:51,959 INFO L231 Difference]: Finished difference. Result has 134 places, 224 transitions, 2833 flow [2024-06-27 20:50:51,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2833, PETRI_PLACES=134, PETRI_TRANSITIONS=224} [2024-06-27 20:50:51,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 20:50:51,960 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 224 transitions, 2833 flow [2024-06-27 20:50:51,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:51,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:51,960 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 20:50:51,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:50:51,960 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:51,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1596938176, now seen corresponding path program 1 times [2024-06-27 20:50:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749494107] [2024-06-27 20:50:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:54,725 INFO 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 20:50:54,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:54,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749494107] [2024-06-27 20:50:54,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749494107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:54,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:54,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698787567] [2024-06-27 20:50:54,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:54,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:54,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:54,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:54,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 224 transitions, 2833 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:54,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:54,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:56,629 INFO L124 PetriNetUnfolderBase]: 4507/6948 cut-off events. [2024-06-27 20:50:56,629 INFO L125 PetriNetUnfolderBase]: For 156181/156189 co-relation queries the response was YES. [2024-06-27 20:50:56,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41439 conditions, 6948 events. 4507/6948 cut-off events. For 156181/156189 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40428 event pairs, 919 based on Foata normal form. 78/7025 useless extension candidates. Maximal degree in co-relation 41373. Up to 2587 conditions per place. [2024-06-27 20:50:56,676 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 126 changer transitions 0/309 dead transitions. [2024-06-27 20:50:56,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 309 transitions, 4109 flow [2024-06-27 20:50:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:50:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:50:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 20:50:56,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-27 20:50:56,677 INFO L175 Difference]: Start difference. First operand has 134 places, 224 transitions, 2833 flow. Second operand 9 states and 192 transitions. [2024-06-27 20:50:56,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 309 transitions, 4109 flow [2024-06-27 20:50:56,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 309 transitions, 4071 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 20:50:56,836 INFO L231 Difference]: Finished difference. Result has 142 places, 234 transitions, 3329 flow [2024-06-27 20:50:56,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3329, PETRI_PLACES=142, PETRI_TRANSITIONS=234} [2024-06-27 20:50:56,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 20:50:56,836 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 234 transitions, 3329 flow [2024-06-27 20:50:56,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:56,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:56,837 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 20:50:56,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:50:56,837 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:56,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash -294174434, now seen corresponding path program 2 times [2024-06-27 20:50:56,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:56,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945116776] [2024-06-27 20:50:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:56,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:59,690 INFO 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 20:50:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945116776] [2024-06-27 20:50:59,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945116776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:59,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:59,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379246080] [2024-06-27 20:50:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:59,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:59,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:59,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:59,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 234 transitions, 3329 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:59,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:59,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:59,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:01,939 INFO L124 PetriNetUnfolderBase]: 5183/8024 cut-off events. [2024-06-27 20:51:01,939 INFO L125 PetriNetUnfolderBase]: For 207906/207910 co-relation queries the response was YES. [2024-06-27 20:51:01,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49568 conditions, 8024 events. 5183/8024 cut-off events. For 207906/207910 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 48266 event pairs, 1487 based on Foata normal form. 74/8097 useless extension candidates. Maximal degree in co-relation 49499. Up to 4493 conditions per place. [2024-06-27 20:51:01,994 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 160 selfloop transitions, 146 changer transitions 0/310 dead transitions. [2024-06-27 20:51:01,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 310 transitions, 4472 flow [2024-06-27 20:51:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 20:51:02,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 20:51:02,005 INFO L175 Difference]: Start difference. First operand has 142 places, 234 transitions, 3329 flow. Second operand 10 states and 204 transitions. [2024-06-27 20:51:02,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 310 transitions, 4472 flow [2024-06-27 20:51:02,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 310 transitions, 4252 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:51:02,293 INFO L231 Difference]: Finished difference. Result has 149 places, 241 transitions, 3605 flow [2024-06-27 20:51:02,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3605, PETRI_PLACES=149, PETRI_TRANSITIONS=241} [2024-06-27 20:51:02,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 20:51:02,294 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 241 transitions, 3605 flow [2024-06-27 20:51:02,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:02,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:02,295 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 20:51:02,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:51:02,295 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:02,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1132910190, now seen corresponding path program 3 times [2024-06-27 20:51:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:02,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985014845] [2024-06-27 20:51:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:05,060 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 20:51:05,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:05,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985014845] [2024-06-27 20:51:05,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985014845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:05,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:05,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:05,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839648118] [2024-06-27 20:51:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:05,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:05,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:05,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:05,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 241 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:05,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:05,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:05,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:07,675 INFO L124 PetriNetUnfolderBase]: 5792/9076 cut-off events. [2024-06-27 20:51:07,675 INFO L125 PetriNetUnfolderBase]: For 247429/247441 co-relation queries the response was YES. [2024-06-27 20:51:07,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56482 conditions, 9076 events. 5792/9076 cut-off events. For 247429/247441 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 57259 event pairs, 1642 based on Foata normal form. 76/9151 useless extension candidates. Maximal degree in co-relation 56410. Up to 5897 conditions per place. [2024-06-27 20:51:07,753 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 174 selfloop transitions, 144 changer transitions 0/322 dead transitions. [2024-06-27 20:51:07,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 4832 flow [2024-06-27 20:51:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 20:51:07,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-27 20:51:07,755 INFO L175 Difference]: Start difference. First operand has 149 places, 241 transitions, 3605 flow. Second operand 10 states and 208 transitions. [2024-06-27 20:51:07,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 4832 flow [2024-06-27 20:51:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 322 transitions, 4498 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:08,158 INFO L231 Difference]: Finished difference. Result has 153 places, 247 transitions, 3724 flow [2024-06-27 20:51:08,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3724, PETRI_PLACES=153, PETRI_TRANSITIONS=247} [2024-06-27 20:51:08,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 20:51:08,159 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 247 transitions, 3724 flow [2024-06-27 20:51:08,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:08,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:08,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:51:08,160 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:08,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2071164104, now seen corresponding path program 4 times [2024-06-27 20:51:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67781842] [2024-06-27 20:51:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:10,619 INFO 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 20:51:10,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67781842] [2024-06-27 20:51:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67781842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:10,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:10,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:10,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030535005] [2024-06-27 20:51:10,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:10,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:10,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:10,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:10,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:10,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:10,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 247 transitions, 3724 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:10,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:10,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:10,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:12,913 INFO L124 PetriNetUnfolderBase]: 6104/9588 cut-off events. [2024-06-27 20:51:12,913 INFO L125 PetriNetUnfolderBase]: For 263688/263696 co-relation queries the response was YES. [2024-06-27 20:51:12,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58644 conditions, 9588 events. 6104/9588 cut-off events. For 263688/263696 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61413 event pairs, 2143 based on Foata normal form. 80/9667 useless extension candidates. Maximal degree in co-relation 58570. Up to 7436 conditions per place. [2024-06-27 20:51:12,999 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 131 changer transitions 0/298 dead transitions. [2024-06-27 20:51:13,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 298 transitions, 4574 flow [2024-06-27 20:51:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:51:13,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:51:13,001 INFO L175 Difference]: Start difference. First operand has 153 places, 247 transitions, 3724 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:51:13,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 298 transitions, 4574 flow [2024-06-27 20:51:13,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 298 transitions, 4336 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:13,515 INFO L231 Difference]: Finished difference. Result has 156 places, 249 transitions, 3824 flow [2024-06-27 20:51:13,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3824, PETRI_PLACES=156, PETRI_TRANSITIONS=249} [2024-06-27 20:51:13,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 20:51:13,516 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 249 transitions, 3824 flow [2024-06-27 20:51:13,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:13,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:13,516 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 20:51:13,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:51:13,517 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:13,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2065801724, now seen corresponding path program 5 times [2024-06-27 20:51:13,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:13,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915713935] [2024-06-27 20:51:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:13,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:15,938 INFO 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 20:51:15,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915713935] [2024-06-27 20:51:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915713935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:15,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:15,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891701977] [2024-06-27 20:51:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:15,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:15,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 249 transitions, 3824 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:15,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:15,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:15,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:18,414 INFO L124 PetriNetUnfolderBase]: 6233/9831 cut-off events. [2024-06-27 20:51:18,414 INFO L125 PetriNetUnfolderBase]: For 267403/267415 co-relation queries the response was YES. [2024-06-27 20:51:18,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59250 conditions, 9831 events. 6233/9831 cut-off events. For 267403/267415 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 63720 event pairs, 2316 based on Foata normal form. 86/9916 useless extension candidates. Maximal degree in co-relation 59174. Up to 7667 conditions per place. [2024-06-27 20:51:18,502 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 172 selfloop transitions, 141 changer transitions 0/317 dead transitions. [2024-06-27 20:51:18,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 317 transitions, 4839 flow [2024-06-27 20:51:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 20:51:18,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 20:51:18,504 INFO L175 Difference]: Start difference. First operand has 156 places, 249 transitions, 3824 flow. Second operand 10 states and 201 transitions. [2024-06-27 20:51:18,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 317 transitions, 4839 flow [2024-06-27 20:51:18,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 317 transitions, 4551 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:19,049 INFO L231 Difference]: Finished difference. Result has 159 places, 251 transitions, 3896 flow [2024-06-27 20:51:19,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3896, PETRI_PLACES=159, PETRI_TRANSITIONS=251} [2024-06-27 20:51:19,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 20:51:19,050 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 251 transitions, 3896 flow [2024-06-27 20:51:19,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:19,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:19,051 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 20:51:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:51:19,051 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:19,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2071379306, now seen corresponding path program 1 times [2024-06-27 20:51:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340280536] [2024-06-27 20:51:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340280536] [2024-06-27 20:51:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340280536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:22,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:22,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244601555] [2024-06-27 20:51:22,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:22,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:22,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:22,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:22,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 251 transitions, 3896 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:51:22,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:22,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:22,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:24,728 INFO L124 PetriNetUnfolderBase]: 6344/10068 cut-off events. [2024-06-27 20:51:24,729 INFO L125 PetriNetUnfolderBase]: For 267911/267919 co-relation queries the response was YES. [2024-06-27 20:51:24,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59629 conditions, 10068 events. 6344/10068 cut-off events. For 267911/267919 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 66009 event pairs, 2050 based on Foata normal form. 60/10127 useless extension candidates. Maximal degree in co-relation 59552. Up to 5962 conditions per place. [2024-06-27 20:51:24,805 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 137 changer transitions 0/306 dead transitions. [2024-06-27 20:51:24,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 306 transitions, 4766 flow [2024-06-27 20:51:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:51:24,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 20:51:24,808 INFO L175 Difference]: Start difference. First operand has 159 places, 251 transitions, 3896 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:51:24,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 306 transitions, 4766 flow [2024-06-27 20:51:25,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 306 transitions, 4454 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:25,253 INFO L231 Difference]: Finished difference. Result has 160 places, 252 transitions, 3904 flow [2024-06-27 20:51:25,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3904, PETRI_PLACES=160, PETRI_TRANSITIONS=252} [2024-06-27 20:51:25,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:51:25,254 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 252 transitions, 3904 flow [2024-06-27 20:51:25,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:51:25,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:25,255 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 20:51:25,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:51:25,255 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:25,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1793274380, now seen corresponding path program 6 times [2024-06-27 20:51:25,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:25,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918271628] [2024-06-27 20:51:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:27,874 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 20:51:27,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918271628] [2024-06-27 20:51:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918271628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:27,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:27,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:27,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107431004] [2024-06-27 20:51:27,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:27,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:27,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:27,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:27,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 252 transitions, 3904 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:27,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:27,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:27,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:30,472 INFO L124 PetriNetUnfolderBase]: 6376/10140 cut-off events. [2024-06-27 20:51:30,473 INFO L125 PetriNetUnfolderBase]: For 260986/261002 co-relation queries the response was YES. [2024-06-27 20:51:30,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59880 conditions, 10140 events. 6376/10140 cut-off events. For 260986/261002 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66751 event pairs, 2655 based on Foata normal form. 29/10167 useless extension candidates. Maximal degree in co-relation 59802. Up to 9260 conditions per place. [2024-06-27 20:51:30,553 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 54 changer transitions 0/291 dead transitions. [2024-06-27 20:51:30,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 291 transitions, 4626 flow [2024-06-27 20:51:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:51:30,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:51:30,555 INFO L175 Difference]: Start difference. First operand has 160 places, 252 transitions, 3904 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:51:30,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 291 transitions, 4626 flow [2024-06-27 20:51:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 291 transitions, 4250 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:30,962 INFO L231 Difference]: Finished difference. Result has 160 places, 253 transitions, 3667 flow [2024-06-27 20:51:30,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3667, PETRI_PLACES=160, PETRI_TRANSITIONS=253} [2024-06-27 20:51:30,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:51:30,962 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 253 transitions, 3667 flow [2024-06-27 20:51:30,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:30,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:30,963 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 20:51:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:51:30,963 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:30,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2049990092, now seen corresponding path program 2 times [2024-06-27 20:51:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865432382] [2024-06-27 20:51:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:34,105 INFO 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 20:51:34,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865432382] [2024-06-27 20:51:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865432382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:34,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:34,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142929172] [2024-06-27 20:51:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:34,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:34,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:34,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:34,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:34,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:34,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 253 transitions, 3667 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:51:34,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:34,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:34,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:36,416 INFO L124 PetriNetUnfolderBase]: 6424/10236 cut-off events. [2024-06-27 20:51:36,416 INFO L125 PetriNetUnfolderBase]: For 266051/266067 co-relation queries the response was YES. [2024-06-27 20:51:36,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59084 conditions, 10236 events. 6424/10236 cut-off events. For 266051/266067 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67635 event pairs, 2655 based on Foata normal form. 21/10255 useless extension candidates. Maximal degree in co-relation 59006. Up to 9238 conditions per place. [2024-06-27 20:51:36,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 56 changer transitions 0/294 dead transitions. [2024-06-27 20:51:36,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 294 transitions, 4407 flow [2024-06-27 20:51:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:51:36,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:51:36,513 INFO L175 Difference]: Start difference. First operand has 160 places, 253 transitions, 3667 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:51:36,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 294 transitions, 4407 flow [2024-06-27 20:51:37,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 294 transitions, 4286 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:37,021 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 3690 flow [2024-06-27 20:51:37,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2024-06-27 20:51:37,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 20:51:37,022 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 3690 flow [2024-06-27 20:51:37,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:51:37,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:37,023 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 20:51:37,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:51:37,023 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:37,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -83964630, now seen corresponding path program 3 times [2024-06-27 20:51:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345447761] [2024-06-27 20:51:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:39,998 INFO 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 20:51:39,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:39,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345447761] [2024-06-27 20:51:39,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345447761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:39,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:39,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328134991] [2024-06-27 20:51:39,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:39,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:39,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:40,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:40,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:40,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:51:40,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:40,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:40,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:42,469 INFO L124 PetriNetUnfolderBase]: 6404/10204 cut-off events. [2024-06-27 20:51:42,469 INFO L125 PetriNetUnfolderBase]: For 273354/273370 co-relation queries the response was YES. [2024-06-27 20:51:42,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58933 conditions, 10204 events. 6404/10204 cut-off events. For 273354/273370 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 66990 event pairs, 2596 based on Foata normal form. 21/10223 useless extension candidates. Maximal degree in co-relation 58854. Up to 8414 conditions per place. [2024-06-27 20:51:42,561 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 225 selfloop transitions, 64 changer transitions 0/293 dead transitions. [2024-06-27 20:51:42,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 293 transitions, 4342 flow [2024-06-27 20:51:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:51:42,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:51:42,563 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 3690 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:51:42,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 293 transitions, 4342 flow [2024-06-27 20:51:43,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 293 transitions, 4212 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:43,077 INFO L231 Difference]: Finished difference. Result has 163 places, 253 transitions, 3630 flow [2024-06-27 20:51:43,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3630, PETRI_PLACES=163, PETRI_TRANSITIONS=253} [2024-06-27 20:51:43,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-27 20:51:43,078 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 253 transitions, 3630 flow [2024-06-27 20:51:43,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:51:43,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:43,079 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 20:51:43,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:51:43,079 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:43,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:43,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1752833707, now seen corresponding path program 1 times [2024-06-27 20:51:43,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:43,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141158442] [2024-06-27 20:51:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:43,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:46,704 INFO 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 20:51:46,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:46,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141158442] [2024-06-27 20:51:46,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141158442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:46,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:46,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:51:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813456081] [2024-06-27 20:51:46,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:46,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:51:46,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:51:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:51:46,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:46,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 253 transitions, 3630 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:46,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:46,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:46,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:48,959 INFO L124 PetriNetUnfolderBase]: 6413/10219 cut-off events. [2024-06-27 20:51:48,959 INFO L125 PetriNetUnfolderBase]: For 281803/281807 co-relation queries the response was YES. [2024-06-27 20:51:49,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59414 conditions, 10219 events. 6413/10219 cut-off events. For 281803/281807 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67701 event pairs, 2799 based on Foata normal form. 8/10226 useless extension candidates. Maximal degree in co-relation 59334. Up to 9950 conditions per place. [2024-06-27 20:51:49,042 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 23 changer transitions 0/282 dead transitions. [2024-06-27 20:51:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 282 transitions, 4352 flow [2024-06-27 20:51:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:51:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:51:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:51:49,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:51:49,044 INFO L175 Difference]: Start difference. First operand has 163 places, 253 transitions, 3630 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:51:49,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 282 transitions, 4352 flow [2024-06-27 20:51:49,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 282 transitions, 4207 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:49,551 INFO L231 Difference]: Finished difference. Result has 165 places, 260 transitions, 3652 flow [2024-06-27 20:51:49,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3652, PETRI_PLACES=165, PETRI_TRANSITIONS=260} [2024-06-27 20:51:49,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 20:51:49,552 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 260 transitions, 3652 flow [2024-06-27 20:51:49,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:49,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:49,552 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 20:51:49,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:51:49,552 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:49,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1310341459, now seen corresponding path program 2 times [2024-06-27 20:51:49,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:49,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286985574] [2024-06-27 20:51:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:49,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:52,588 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 20:51:52,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286985574] [2024-06-27 20:51:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286985574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:51:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19069253] [2024-06-27 20:51:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:52,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:51:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:51:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:51:52,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:52,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 260 transitions, 3652 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:52,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:52,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:52,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:54,864 INFO L124 PetriNetUnfolderBase]: 6407/10211 cut-off events. [2024-06-27 20:51:54,865 INFO L125 PetriNetUnfolderBase]: For 291035/291041 co-relation queries the response was YES. [2024-06-27 20:51:54,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59229 conditions, 10211 events. 6407/10211 cut-off events. For 291035/291041 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67635 event pairs, 2799 based on Foata normal form. 8/10218 useless extension candidates. Maximal degree in co-relation 59148. Up to 9936 conditions per place. [2024-06-27 20:51:54,961 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 25 changer transitions 0/281 dead transitions. [2024-06-27 20:51:54,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 281 transitions, 4274 flow [2024-06-27 20:51:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:51:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:51:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:51:54,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:51:54,962 INFO L175 Difference]: Start difference. First operand has 165 places, 260 transitions, 3652 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:51:54,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 281 transitions, 4274 flow [2024-06-27 20:51:55,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 281 transitions, 4195 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:51:55,556 INFO L231 Difference]: Finished difference. Result has 167 places, 260 transitions, 3636 flow [2024-06-27 20:51:55,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3636, PETRI_PLACES=167, PETRI_TRANSITIONS=260} [2024-06-27 20:51:55,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 20:51:55,557 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 260 transitions, 3636 flow [2024-06-27 20:51:55,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:55,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:55,557 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 20:51:55,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:51:55,558 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:55,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash 826291279, now seen corresponding path program 3 times [2024-06-27 20:51:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806115562] [2024-06-27 20:51:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:58,014 INFO 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 20:51:58,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806115562] [2024-06-27 20:51:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806115562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:58,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:51:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030090721] [2024-06-27 20:51:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:51:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:51:58,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:51:58,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:58,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 260 transitions, 3636 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:58,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:58,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:58,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:00,120 INFO L124 PetriNetUnfolderBase]: 6401/10219 cut-off events. [2024-06-27 20:52:00,121 INFO L125 PetriNetUnfolderBase]: For 302998/303010 co-relation queries the response was YES. [2024-06-27 20:52:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59506 conditions, 10219 events. 6401/10219 cut-off events. For 302998/303010 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67892 event pairs, 2759 based on Foata normal form. 14/10232 useless extension candidates. Maximal degree in co-relation 59424. Up to 9914 conditions per place. [2024-06-27 20:52:00,223 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 245 selfloop transitions, 29 changer transitions 0/278 dead transitions. [2024-06-27 20:52:00,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 278 transitions, 4282 flow [2024-06-27 20:52:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:52:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:52:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 20:52:00,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-27 20:52:00,225 INFO L175 Difference]: Start difference. First operand has 167 places, 260 transitions, 3636 flow. Second operand 6 states and 95 transitions. [2024-06-27 20:52:00,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 278 transitions, 4282 flow [2024-06-27 20:52:00,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 278 transitions, 3990 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:52:00,789 INFO L231 Difference]: Finished difference. Result has 165 places, 263 transitions, 3464 flow [2024-06-27 20:52:00,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3464, PETRI_PLACES=165, PETRI_TRANSITIONS=263} [2024-06-27 20:52:00,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 20:52:00,790 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 263 transitions, 3464 flow [2024-06-27 20:52:00,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:00,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:00,791 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 20:52:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:52:00,791 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:00,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash 542148407, now seen corresponding path program 1 times [2024-06-27 20:52:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:00,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023144523] [2024-06-27 20:52:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:02,810 INFO 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 20:52:02,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:02,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023144523] [2024-06-27 20:52:02,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023144523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734432275] [2024-06-27 20:52:02,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:02,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:02,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 263 transitions, 3464 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:02,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:02,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:02,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:05,256 INFO L124 PetriNetUnfolderBase]: 6443/10265 cut-off events. [2024-06-27 20:52:05,257 INFO L125 PetriNetUnfolderBase]: For 301202/301204 co-relation queries the response was YES. [2024-06-27 20:52:05,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59693 conditions, 10265 events. 6443/10265 cut-off events. For 301202/301204 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67917 event pairs, 2791 based on Foata normal form. 2/10266 useless extension candidates. Maximal degree in co-relation 59612. Up to 9909 conditions per place. [2024-06-27 20:52:05,347 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 27 changer transitions 0/302 dead transitions. [2024-06-27 20:52:05,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 302 transitions, 4440 flow [2024-06-27 20:52:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:52:05,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:52:05,349 INFO L175 Difference]: Start difference. First operand has 165 places, 263 transitions, 3464 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:52:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 302 transitions, 4440 flow [2024-06-27 20:52:05,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 302 transitions, 4342 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:52:05,847 INFO L231 Difference]: Finished difference. Result has 169 places, 274 transitions, 3615 flow [2024-06-27 20:52:05,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3615, PETRI_PLACES=169, PETRI_TRANSITIONS=274} [2024-06-27 20:52:05,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 20:52:05,848 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 274 transitions, 3615 flow [2024-06-27 20:52:05,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:05,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:05,848 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 20:52:05,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:52:05,849 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:05,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash 542268563, now seen corresponding path program 1 times [2024-06-27 20:52:05,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:05,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114151453] [2024-06-27 20:52:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:08,008 INFO 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 20:52:08,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:08,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114151453] [2024-06-27 20:52:08,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114151453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:08,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:08,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177513615] [2024-06-27 20:52:08,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:08,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:08,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:08,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 274 transitions, 3615 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:08,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:08,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:08,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:10,289 INFO L124 PetriNetUnfolderBase]: 6534/10392 cut-off events. [2024-06-27 20:52:10,290 INFO L125 PetriNetUnfolderBase]: For 327609/327611 co-relation queries the response was YES. [2024-06-27 20:52:10,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62283 conditions, 10392 events. 6534/10392 cut-off events. For 327609/327611 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68871 event pairs, 2857 based on Foata normal form. 6/10397 useless extension candidates. Maximal degree in co-relation 62200. Up to 10088 conditions per place. [2024-06-27 20:52:10,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 24 changer transitions 0/307 dead transitions. [2024-06-27 20:52:10,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 307 transitions, 4521 flow [2024-06-27 20:52:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:52:10,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 20:52:10,378 INFO L175 Difference]: Start difference. First operand has 169 places, 274 transitions, 3615 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:52:10,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 307 transitions, 4521 flow [2024-06-27 20:52:10,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 307 transitions, 4415 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-27 20:52:10,862 INFO L231 Difference]: Finished difference. Result has 176 places, 285 transitions, 3757 flow [2024-06-27 20:52:10,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3757, PETRI_PLACES=176, PETRI_TRANSITIONS=285} [2024-06-27 20:52:10,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 20:52:10,863 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 285 transitions, 3757 flow [2024-06-27 20:52:10,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:10,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:10,863 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 20:52:10,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:52:10,863 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:10,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1515523275, now seen corresponding path program 2 times [2024-06-27 20:52:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:10,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38672464] [2024-06-27 20:52:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:10,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:13,184 INFO 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 20:52:13,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38672464] [2024-06-27 20:52:13,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38672464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:13,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:13,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:13,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836623617] [2024-06-27 20:52:13,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:13,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:13,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:13,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:13,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 285 transitions, 3757 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:13,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:13,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:13,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:15,703 INFO L124 PetriNetUnfolderBase]: 6508/10356 cut-off events. [2024-06-27 20:52:15,703 INFO L125 PetriNetUnfolderBase]: For 339436/339438 co-relation queries the response was YES. [2024-06-27 20:52:15,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62255 conditions, 10356 events. 6508/10356 cut-off events. For 339436/339438 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68687 event pairs, 2856 based on Foata normal form. 6/10361 useless extension candidates. Maximal degree in co-relation 62169. Up to 10069 conditions per place. [2024-06-27 20:52:15,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 24 changer transitions 0/306 dead transitions. [2024-06-27 20:52:15,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 306 transitions, 4419 flow [2024-06-27 20:52:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:52:15,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 20:52:15,786 INFO L175 Difference]: Start difference. First operand has 176 places, 285 transitions, 3757 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:52:15,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 306 transitions, 4419 flow [2024-06-27 20:52:16,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 306 transitions, 4309 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:52:16,342 INFO L231 Difference]: Finished difference. Result has 180 places, 285 transitions, 3703 flow [2024-06-27 20:52:16,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3703, PETRI_PLACES=180, PETRI_TRANSITIONS=285} [2024-06-27 20:52:16,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:52:16,342 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 285 transitions, 3703 flow [2024-06-27 20:52:16,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:16,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:16,343 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 20:52:16,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:52:16,343 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:16,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:16,343 INFO L85 PathProgramCache]: Analyzing trace with hash 826297231, now seen corresponding path program 2 times [2024-06-27 20:52:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:16,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301707742] [2024-06-27 20:52:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301707742] [2024-06-27 20:52:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301707742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:18,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:18,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641706538] [2024-06-27 20:52:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:18,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:18,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 285 transitions, 3703 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:18,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:18,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:18,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:20,635 INFO L124 PetriNetUnfolderBase]: 6550/10415 cut-off events. [2024-06-27 20:52:20,635 INFO L125 PetriNetUnfolderBase]: For 354661/354665 co-relation queries the response was YES. [2024-06-27 20:52:20,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63011 conditions, 10415 events. 6550/10415 cut-off events. For 354661/354665 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68808 event pairs, 2806 based on Foata normal form. 4/10418 useless extension candidates. Maximal degree in co-relation 62924. Up to 10017 conditions per place. [2024-06-27 20:52:20,737 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 38 changer transitions 0/314 dead transitions. [2024-06-27 20:52:20,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 314 transitions, 4619 flow [2024-06-27 20:52:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:52:20,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 20:52:20,739 INFO L175 Difference]: Start difference. First operand has 180 places, 285 transitions, 3703 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:52:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 314 transitions, 4619 flow [2024-06-27 20:52:21,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 314 transitions, 4571 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:21,422 INFO L231 Difference]: Finished difference. Result has 181 places, 291 transitions, 3845 flow [2024-06-27 20:52:21,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3845, PETRI_PLACES=181, PETRI_TRANSITIONS=291} [2024-06-27 20:52:21,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 20:52:21,423 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 291 transitions, 3845 flow [2024-06-27 20:52:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:21,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:21,423 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 20:52:21,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:52:21,424 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:21,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 851084521, now seen corresponding path program 3 times [2024-06-27 20:52:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:21,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053756968] [2024-06-27 20:52:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:21,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:23,694 INFO 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 20:52:23,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:23,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053756968] [2024-06-27 20:52:23,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053756968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:23,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:23,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485129496] [2024-06-27 20:52:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:23,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:23,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 291 transitions, 3845 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:23,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:23,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:23,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:26,136 INFO L124 PetriNetUnfolderBase]: 6540/10402 cut-off events. [2024-06-27 20:52:26,136 INFO L125 PetriNetUnfolderBase]: For 370135/370137 co-relation queries the response was YES. [2024-06-27 20:52:26,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63383 conditions, 10402 events. 6540/10402 cut-off events. For 370135/370137 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68741 event pairs, 2802 based on Foata normal form. 6/10407 useless extension candidates. Maximal degree in co-relation 63294. Up to 10014 conditions per place. [2024-06-27 20:52:26,241 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 39 changer transitions 0/318 dead transitions. [2024-06-27 20:52:26,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 318 transitions, 4625 flow [2024-06-27 20:52:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:52:26,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:52:26,248 INFO L175 Difference]: Start difference. First operand has 181 places, 291 transitions, 3845 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:52:26,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 318 transitions, 4625 flow [2024-06-27 20:52:26,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 318 transitions, 4545 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:52:26,974 INFO L231 Difference]: Finished difference. Result has 186 places, 291 transitions, 3857 flow [2024-06-27 20:52:26,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3857, PETRI_PLACES=186, PETRI_TRANSITIONS=291} [2024-06-27 20:52:26,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 20:52:26,977 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 291 transitions, 3857 flow [2024-06-27 20:52:26,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:26,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:26,977 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 20:52:26,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:52:26,977 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:26,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 826059895, now seen corresponding path program 3 times [2024-06-27 20:52:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282888865] [2024-06-27 20:52:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:29,129 INFO 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 20:52:29,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:29,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282888865] [2024-06-27 20:52:29,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282888865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:29,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:29,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689982054] [2024-06-27 20:52:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:29,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:29,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 291 transitions, 3857 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:29,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:29,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:29,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:31,484 INFO L124 PetriNetUnfolderBase]: 6514/10366 cut-off events. [2024-06-27 20:52:31,484 INFO L125 PetriNetUnfolderBase]: For 382906/382908 co-relation queries the response was YES. [2024-06-27 20:52:31,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63405 conditions, 10366 events. 6514/10366 cut-off events. For 382906/382908 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68546 event pairs, 2799 based on Foata normal form. 6/10371 useless extension candidates. Maximal degree in co-relation 63315. Up to 9995 conditions per place. [2024-06-27 20:52:31,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 40 changer transitions 0/317 dead transitions. [2024-06-27 20:52:31,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 317 transitions, 4557 flow [2024-06-27 20:52:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:52:31,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:52:31,588 INFO L175 Difference]: Start difference. First operand has 186 places, 291 transitions, 3857 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:52:31,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 317 transitions, 4557 flow [2024-06-27 20:52:32,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 317 transitions, 4433 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:32,329 INFO L231 Difference]: Finished difference. Result has 187 places, 291 transitions, 3832 flow [2024-06-27 20:52:32,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3832, PETRI_PLACES=187, PETRI_TRANSITIONS=291} [2024-06-27 20:52:32,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 20:52:32,330 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 291 transitions, 3832 flow [2024-06-27 20:52:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:32,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:32,331 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 20:52:32,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:52:32,331 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:32,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash 826306159, now seen corresponding path program 1 times [2024-06-27 20:52:32,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:32,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568339601] [2024-06-27 20:52:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:35,240 INFO 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 20:52:35,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:35,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568339601] [2024-06-27 20:52:35,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568339601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:35,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:35,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:35,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291450741] [2024-06-27 20:52:35,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:35,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:35,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:35,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:35,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 291 transitions, 3832 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:35,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:35,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:37,578 INFO L124 PetriNetUnfolderBase]: 6509/10356 cut-off events. [2024-06-27 20:52:37,579 INFO L125 PetriNetUnfolderBase]: For 394820/394822 co-relation queries the response was YES. [2024-06-27 20:52:37,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63675 conditions, 10356 events. 6509/10356 cut-off events. For 394820/394822 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68382 event pairs, 2854 based on Foata normal form. 2/10357 useless extension candidates. Maximal degree in co-relation 63584. Up to 10121 conditions per place. [2024-06-27 20:52:37,706 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 290 selfloop transitions, 12 changer transitions 0/306 dead transitions. [2024-06-27 20:52:37,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 306 transitions, 4504 flow [2024-06-27 20:52:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:52:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:52:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 20:52:37,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 20:52:37,708 INFO L175 Difference]: Start difference. First operand has 187 places, 291 transitions, 3832 flow. Second operand 6 states and 92 transitions. [2024-06-27 20:52:37,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 306 transitions, 4504 flow [2024-06-27 20:52:38,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 306 transitions, 4399 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:52:38,383 INFO L231 Difference]: Finished difference. Result has 184 places, 293 transitions, 3792 flow [2024-06-27 20:52:38,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3792, PETRI_PLACES=184, PETRI_TRANSITIONS=293} [2024-06-27 20:52:38,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 20:52:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 293 transitions, 3792 flow [2024-06-27 20:52:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:38,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:38,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:52:38,385 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:38,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1580637886, now seen corresponding path program 1 times [2024-06-27 20:52:38,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:38,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892453152] [2024-06-27 20:52:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:41,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892453152] [2024-06-27 20:52:41,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892453152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:41,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936529395] [2024-06-27 20:52:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:41,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:41,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 293 transitions, 3792 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:41,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:41,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:41,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:43,968 INFO L124 PetriNetUnfolderBase]: 6669/10594 cut-off events. [2024-06-27 20:52:43,968 INFO L125 PetriNetUnfolderBase]: For 406082/406096 co-relation queries the response was YES. [2024-06-27 20:52:44,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65213 conditions, 10594 events. 6669/10594 cut-off events. For 406082/406096 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 70155 event pairs, 2699 based on Foata normal form. 30/10623 useless extension candidates. Maximal degree in co-relation 65122. Up to 9997 conditions per place. [2024-06-27 20:52:44,054 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 81 changer transitions 4/351 dead transitions. [2024-06-27 20:52:44,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 351 transitions, 4952 flow [2024-06-27 20:52:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:52:44,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:52:44,056 INFO L175 Difference]: Start difference. First operand has 184 places, 293 transitions, 3792 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:52:44,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 351 transitions, 4952 flow [2024-06-27 20:52:44,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 351 transitions, 4903 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:52:44,673 INFO L231 Difference]: Finished difference. Result has 190 places, 314 transitions, 4280 flow [2024-06-27 20:52:44,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4280, PETRI_PLACES=190, PETRI_TRANSITIONS=314} [2024-06-27 20:52:44,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 20:52:44,674 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 314 transitions, 4280 flow [2024-06-27 20:52:44,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:44,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:44,674 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 20:52:44,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:52:44,675 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:44,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -534406594, now seen corresponding path program 2 times [2024-06-27 20:52:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:44,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485551174] [2024-06-27 20:52:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485551174] [2024-06-27 20:52:48,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485551174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:48,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:48,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727269904] [2024-06-27 20:52:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:48,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:48,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:48,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:48,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 314 transitions, 4280 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:48,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:48,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:48,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:50,894 INFO L124 PetriNetUnfolderBase]: 7124/11277 cut-off events. [2024-06-27 20:52:50,894 INFO L125 PetriNetUnfolderBase]: For 450863/450871 co-relation queries the response was YES. [2024-06-27 20:52:50,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71554 conditions, 11277 events. 7124/11277 cut-off events. For 450863/450871 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74689 event pairs, 2641 based on Foata normal form. 22/11298 useless extension candidates. Maximal degree in co-relation 71461. Up to 9707 conditions per place. [2024-06-27 20:52:51,001 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 245 selfloop transitions, 145 changer transitions 1/395 dead transitions. [2024-06-27 20:52:51,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 395 transitions, 6069 flow [2024-06-27 20:52:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:52:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:52:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:52:51,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:52:51,003 INFO L175 Difference]: Start difference. First operand has 190 places, 314 transitions, 4280 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:52:51,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 395 transitions, 6069 flow [2024-06-27 20:52:51,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 395 transitions, 5853 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:52:51,793 INFO L231 Difference]: Finished difference. Result has 198 places, 359 transitions, 5271 flow [2024-06-27 20:52:51,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5271, PETRI_PLACES=198, PETRI_TRANSITIONS=359} [2024-06-27 20:52:51,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 20:52:51,794 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 359 transitions, 5271 flow [2024-06-27 20:52:51,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:51,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:51,794 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 20:52:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:52:51,795 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:51,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1571372296, now seen corresponding path program 3 times [2024-06-27 20:52:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477856971] [2024-06-27 20:52:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477856971] [2024-06-27 20:52:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477856971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:54,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054629620] [2024-06-27 20:52:54,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:54,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 359 transitions, 5271 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:57,701 INFO L124 PetriNetUnfolderBase]: 7092/11289 cut-off events. [2024-06-27 20:52:57,702 INFO L125 PetriNetUnfolderBase]: For 459832/459840 co-relation queries the response was YES. [2024-06-27 20:52:57,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73143 conditions, 11289 events. 7092/11289 cut-off events. For 459832/459840 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75249 event pairs, 2567 based on Foata normal form. 22/11310 useless extension candidates. Maximal degree in co-relation 73046. Up to 9701 conditions per place. [2024-06-27 20:52:57,791 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 142 changer transitions 0/392 dead transitions. [2024-06-27 20:52:57,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 392 transitions, 6256 flow [2024-06-27 20:52:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:52:57,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:52:57,793 INFO L175 Difference]: Start difference. First operand has 198 places, 359 transitions, 5271 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:52:57,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 392 transitions, 6256 flow [2024-06-27 20:52:58,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 392 transitions, 6094 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-27 20:52:58,585 INFO L231 Difference]: Finished difference. Result has 206 places, 364 transitions, 5570 flow [2024-06-27 20:52:58,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5570, PETRI_PLACES=206, PETRI_TRANSITIONS=364} [2024-06-27 20:52:58,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 20:52:58,587 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 364 transitions, 5570 flow [2024-06-27 20:52:58,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:58,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:58,587 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 20:52:58,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:52:58,587 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:58,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1965889594, now seen corresponding path program 4 times [2024-06-27 20:52:58,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:58,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732774076] [2024-06-27 20:52:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732774076] [2024-06-27 20:53:01,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732774076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:01,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:01,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493941648] [2024-06-27 20:53:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:01,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:01,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 364 transitions, 5570 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:01,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:01,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:01,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:04,515 INFO L124 PetriNetUnfolderBase]: 7132/11357 cut-off events. [2024-06-27 20:53:04,515 INFO L125 PetriNetUnfolderBase]: For 477716/477730 co-relation queries the response was YES. [2024-06-27 20:53:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75530 conditions, 11357 events. 7132/11357 cut-off events. For 477716/477730 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75778 event pairs, 2586 based on Foata normal form. 22/11378 useless extension candidates. Maximal degree in co-relation 75430. Up to 9084 conditions per place. [2024-06-27 20:53:04,649 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 195 selfloop transitions, 216 changer transitions 1/416 dead transitions. [2024-06-27 20:53:04,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 416 transitions, 6804 flow [2024-06-27 20:53:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:53:04,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:53:04,651 INFO L175 Difference]: Start difference. First operand has 206 places, 364 transitions, 5570 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:53:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 416 transitions, 6804 flow [2024-06-27 20:53:05,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 416 transitions, 6608 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:05,572 INFO L231 Difference]: Finished difference. Result has 210 places, 368 transitions, 5919 flow [2024-06-27 20:53:05,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5919, PETRI_PLACES=210, PETRI_TRANSITIONS=368} [2024-06-27 20:53:05,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 20:53:05,573 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 368 transitions, 5919 flow [2024-06-27 20:53:05,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:05,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:05,574 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 20:53:05,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:53:05,574 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:05,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1965503644, now seen corresponding path program 5 times [2024-06-27 20:53:05,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:05,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803848220] [2024-06-27 20:53:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:08,692 INFO 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 20:53:08,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:08,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803848220] [2024-06-27 20:53:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803848220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:08,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:08,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:08,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231249245] [2024-06-27 20:53:08,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:08,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:08,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 368 transitions, 5919 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:08,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:08,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:11,796 INFO L124 PetriNetUnfolderBase]: 7356/11695 cut-off events. [2024-06-27 20:53:11,797 INFO L125 PetriNetUnfolderBase]: For 525365/525381 co-relation queries the response was YES. [2024-06-27 20:53:11,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79792 conditions, 11695 events. 7356/11695 cut-off events. For 525365/525381 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 78263 event pairs, 1975 based on Foata normal form. 17/11710 useless extension candidates. Maximal degree in co-relation 79691. Up to 8913 conditions per place. [2024-06-27 20:53:11,901 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 228 changer transitions 0/415 dead transitions. [2024-06-27 20:53:11,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 415 transitions, 7373 flow [2024-06-27 20:53:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:53:11,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:53:11,903 INFO L175 Difference]: Start difference. First operand has 210 places, 368 transitions, 5919 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:53:11,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 415 transitions, 7373 flow [2024-06-27 20:53:12,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 415 transitions, 7012 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:53:12,961 INFO L231 Difference]: Finished difference. Result has 213 places, 385 transitions, 6421 flow [2024-06-27 20:53:12,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6421, PETRI_PLACES=213, PETRI_TRANSITIONS=385} [2024-06-27 20:53:12,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 20:53:12,961 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 385 transitions, 6421 flow [2024-06-27 20:53:12,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:12,962 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 20:53:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:53:12,962 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:12,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash 966186046, now seen corresponding path program 6 times [2024-06-27 20:53:12,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635219901] [2024-06-27 20:53:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:12,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:16,177 INFO 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 20:53:16,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635219901] [2024-06-27 20:53:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635219901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:16,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:16,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:16,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819609434] [2024-06-27 20:53:16,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:16,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:16,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:16,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 385 transitions, 6421 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:16,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:16,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:19,109 INFO L124 PetriNetUnfolderBase]: 7344/11685 cut-off events. [2024-06-27 20:53:19,110 INFO L125 PetriNetUnfolderBase]: For 529219/529227 co-relation queries the response was YES. [2024-06-27 20:53:19,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82343 conditions, 11685 events. 7344/11685 cut-off events. For 529219/529227 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 78251 event pairs, 2599 based on Foata normal form. 14/11698 useless extension candidates. Maximal degree in co-relation 82240. Up to 9397 conditions per place. [2024-06-27 20:53:19,244 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 198 changer transitions 0/416 dead transitions. [2024-06-27 20:53:19,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 416 transitions, 7419 flow [2024-06-27 20:53:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:53:19,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:53:19,245 INFO L175 Difference]: Start difference. First operand has 213 places, 385 transitions, 6421 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:53:19,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 416 transitions, 7419 flow [2024-06-27 20:53:20,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 416 transitions, 7159 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:20,534 INFO L231 Difference]: Finished difference. Result has 218 places, 385 transitions, 6580 flow [2024-06-27 20:53:20,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6580, PETRI_PLACES=218, PETRI_TRANSITIONS=385} [2024-06-27 20:53:20,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 20:53:20,535 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 385 transitions, 6580 flow [2024-06-27 20:53:20,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:20,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:20,535 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 20:53:20,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:53:20,535 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:20,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash 671296298, now seen corresponding path program 1 times [2024-06-27 20:53:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375205507] [2024-06-27 20:53:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:22,995 INFO 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 20:53:22,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:22,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375205507] [2024-06-27 20:53:22,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375205507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:22,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:22,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998073601] [2024-06-27 20:53:22,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:22,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:22,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:23,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:23,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 385 transitions, 6580 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:23,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:23,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:23,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:26,124 INFO L124 PetriNetUnfolderBase]: 7332/11666 cut-off events. [2024-06-27 20:53:26,125 INFO L125 PetriNetUnfolderBase]: For 547822/547824 co-relation queries the response was YES. [2024-06-27 20:53:26,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82608 conditions, 11666 events. 7332/11666 cut-off events. For 547822/547824 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 78089 event pairs, 2972 based on Foata normal form. 4/11669 useless extension candidates. Maximal degree in co-relation 82504. Up to 11129 conditions per place. [2024-06-27 20:53:26,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 43 changer transitions 0/414 dead transitions. [2024-06-27 20:53:26,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 414 transitions, 7480 flow [2024-06-27 20:53:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:53:26,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:53:26,254 INFO L175 Difference]: Start difference. First operand has 218 places, 385 transitions, 6580 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:53:26,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 414 transitions, 7480 flow [2024-06-27 20:53:27,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 414 transitions, 6855 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 20:53:27,534 INFO L231 Difference]: Finished difference. Result has 217 places, 385 transitions, 6047 flow [2024-06-27 20:53:27,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6047, PETRI_PLACES=217, PETRI_TRANSITIONS=385} [2024-06-27 20:53:27,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 20:53:27,535 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 385 transitions, 6047 flow [2024-06-27 20:53:27,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:27,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:27,535 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 20:53:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:53:27,536 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:27,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash -492132782, now seen corresponding path program 1 times [2024-06-27 20:53:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:27,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942842778] [2024-06-27 20:53:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:30,621 INFO 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 20:53:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942842778] [2024-06-27 20:53:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942842778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:30,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:30,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:30,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122799467] [2024-06-27 20:53:30,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:30,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:30,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 385 transitions, 6047 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:30,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:30,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:30,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:33,694 INFO L124 PetriNetUnfolderBase]: 7512/11862 cut-off events. [2024-06-27 20:53:33,695 INFO L125 PetriNetUnfolderBase]: For 553050/553054 co-relation queries the response was YES. [2024-06-27 20:53:33,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83018 conditions, 11862 events. 7512/11862 cut-off events. For 553050/553054 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 78795 event pairs, 2563 based on Foata normal form. 6/11867 useless extension candidates. Maximal degree in co-relation 82913. Up to 9425 conditions per place. [2024-06-27 20:53:33,821 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 218 changer transitions 0/444 dead transitions. [2024-06-27 20:53:33,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 444 transitions, 7507 flow [2024-06-27 20:53:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:53:33,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:53:33,822 INFO L175 Difference]: Start difference. First operand has 217 places, 385 transitions, 6047 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:53:33,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 444 transitions, 7507 flow [2024-06-27 20:53:34,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 444 transitions, 7334 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 20:53:34,812 INFO L231 Difference]: Finished difference. Result has 219 places, 396 transitions, 6560 flow [2024-06-27 20:53:34,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6560, PETRI_PLACES=219, PETRI_TRANSITIONS=396} [2024-06-27 20:53:34,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 20:53:34,813 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 396 transitions, 6560 flow [2024-06-27 20:53:34,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:34,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:34,813 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 20:53:34,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:53:34,813 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:34,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:34,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1645264460, now seen corresponding path program 1 times [2024-06-27 20:53:34,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:34,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394630730] [2024-06-27 20:53:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:37,691 INFO 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 20:53:37,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394630730] [2024-06-27 20:53:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394630730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:37,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:37,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437359429] [2024-06-27 20:53:37,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:37,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:37,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:37,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 396 transitions, 6560 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:37,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:37,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:37,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:40,876 INFO L124 PetriNetUnfolderBase]: 7720/12166 cut-off events. [2024-06-27 20:53:40,877 INFO L125 PetriNetUnfolderBase]: For 594346/594350 co-relation queries the response was YES. [2024-06-27 20:53:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88706 conditions, 12166 events. 7720/12166 cut-off events. For 594346/594350 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80684 event pairs, 2901 based on Foata normal form. 38/12203 useless extension candidates. Maximal degree in co-relation 88601. Up to 11295 conditions per place. [2024-06-27 20:53:41,010 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 108 changer transitions 6/455 dead transitions. [2024-06-27 20:53:41,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 455 transitions, 8162 flow [2024-06-27 20:53:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:53:41,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:53:41,012 INFO L175 Difference]: Start difference. First operand has 219 places, 396 transitions, 6560 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:53:41,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 455 transitions, 8162 flow [2024-06-27 20:53:42,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 455 transitions, 7865 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 20:53:42,266 INFO L231 Difference]: Finished difference. Result has 224 places, 420 transitions, 7088 flow [2024-06-27 20:53:42,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7088, PETRI_PLACES=224, PETRI_TRANSITIONS=420} [2024-06-27 20:53:42,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 20:53:42,267 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 420 transitions, 7088 flow [2024-06-27 20:53:42,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:42,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:42,267 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 20:53:42,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:53:42,267 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:42,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1468132940, now seen corresponding path program 2 times [2024-06-27 20:53:42,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:42,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181417983] [2024-06-27 20:53:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:42,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:45,531 INFO 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 20:53:45,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:45,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181417983] [2024-06-27 20:53:45,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181417983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:45,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:45,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:45,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277637608] [2024-06-27 20:53:45,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:45,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:45,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:45,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 420 transitions, 7088 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:45,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:45,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:45,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:48,625 INFO L124 PetriNetUnfolderBase]: 7568/11993 cut-off events. [2024-06-27 20:53:48,626 INFO L125 PetriNetUnfolderBase]: For 556880/556892 co-relation queries the response was YES. [2024-06-27 20:53:48,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85370 conditions, 11993 events. 7568/11993 cut-off events. For 556880/556892 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 80009 event pairs, 2786 based on Foata normal form. 34/12026 useless extension candidates. Maximal degree in co-relation 85262. Up to 10311 conditions per place. [2024-06-27 20:53:48,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 170 changer transitions 2/458 dead transitions. [2024-06-27 20:53:48,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 458 transitions, 8446 flow [2024-06-27 20:53:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:53:48,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:53:48,762 INFO L175 Difference]: Start difference. First operand has 224 places, 420 transitions, 7088 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:53:48,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 458 transitions, 8446 flow [2024-06-27 20:53:50,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 458 transitions, 8249 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:50,028 INFO L231 Difference]: Finished difference. Result has 229 places, 426 transitions, 7397 flow [2024-06-27 20:53:50,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7397, PETRI_PLACES=229, PETRI_TRANSITIONS=426} [2024-06-27 20:53:50,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 20:53:50,028 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 426 transitions, 7397 flow [2024-06-27 20:53:50,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:50,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:50,029 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 20:53:50,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:53:50,029 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:50,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1467895790, now seen corresponding path program 3 times [2024-06-27 20:53:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:50,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886267371] [2024-06-27 20:53:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:53,216 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 20:53:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:53,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886267371] [2024-06-27 20:53:53,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886267371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:53,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:53,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301037866] [2024-06-27 20:53:53,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:53,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:53,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:53,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 426 transitions, 7397 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:53,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:53,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:53,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:56,062 INFO L124 PetriNetUnfolderBase]: 7496/11913 cut-off events. [2024-06-27 20:53:56,062 INFO L125 PetriNetUnfolderBase]: For 554769/554781 co-relation queries the response was YES. [2024-06-27 20:53:56,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85101 conditions, 11913 events. 7496/11913 cut-off events. For 554769/554781 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 79754 event pairs, 2705 based on Foata normal form. 18/11930 useless extension candidates. Maximal degree in co-relation 84992. Up to 10279 conditions per place. [2024-06-27 20:53:56,194 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 281 selfloop transitions, 164 changer transitions 4/453 dead transitions. [2024-06-27 20:53:56,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 453 transitions, 8459 flow [2024-06-27 20:53:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:53:56,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:53:56,196 INFO L175 Difference]: Start difference. First operand has 229 places, 426 transitions, 7397 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:53:56,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 453 transitions, 8459 flow [2024-06-27 20:53:57,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 453 transitions, 8238 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:57,531 INFO L231 Difference]: Finished difference. Result has 233 places, 422 transitions, 7426 flow [2024-06-27 20:53:57,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7426, PETRI_PLACES=233, PETRI_TRANSITIONS=422} [2024-06-27 20:53:57,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 20:53:57,531 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 422 transitions, 7426 flow [2024-06-27 20:53:57,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:57,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:57,532 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 20:53:57,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:53:57,532 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:57,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1467886862, now seen corresponding path program 1 times [2024-06-27 20:53:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:57,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731738074] [2024-06-27 20:53:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731738074] [2024-06-27 20:54:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731738074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:01,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390954800] [2024-06-27 20:54:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:01,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:01,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 422 transitions, 7426 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:01,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:01,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:01,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:04,015 INFO L124 PetriNetUnfolderBase]: 7408/11794 cut-off events. [2024-06-27 20:54:04,015 INFO L125 PetriNetUnfolderBase]: For 572538/572544 co-relation queries the response was YES. [2024-06-27 20:54:04,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84392 conditions, 11794 events. 7408/11794 cut-off events. For 572538/572544 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 79076 event pairs, 2973 based on Foata normal form. 8/11801 useless extension candidates. Maximal degree in co-relation 84283. Up to 11371 conditions per place. [2024-06-27 20:54:04,145 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 25 changer transitions 0/448 dead transitions. [2024-06-27 20:54:04,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 448 transitions, 8440 flow [2024-06-27 20:54:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:54:04,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 20:54:04,146 INFO L175 Difference]: Start difference. First operand has 233 places, 422 transitions, 7426 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:54:04,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 448 transitions, 8440 flow [2024-06-27 20:54:05,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 448 transitions, 8184 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:05,638 INFO L231 Difference]: Finished difference. Result has 235 places, 424 transitions, 7282 flow [2024-06-27 20:54:05,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7170, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7282, PETRI_PLACES=235, PETRI_TRANSITIONS=424} [2024-06-27 20:54:05,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 20:54:05,639 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 424 transitions, 7282 flow [2024-06-27 20:54:05,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:05,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:05,639 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 20:54:05,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:54:05,640 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:05,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1074281560, now seen corresponding path program 2 times [2024-06-27 20:54:05,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432753710] [2024-06-27 20:54:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:08,878 INFO 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 20:54:08,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:08,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432753710] [2024-06-27 20:54:08,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432753710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:08,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:08,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944447954] [2024-06-27 20:54:08,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:08,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:08,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:08,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:08,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:08,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:08,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 424 transitions, 7282 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:08,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:08,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:08,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:12,190 INFO L124 PetriNetUnfolderBase]: 7402/11732 cut-off events. [2024-06-27 20:54:12,190 INFO L125 PetriNetUnfolderBase]: For 588619/588621 co-relation queries the response was YES. [2024-06-27 20:54:12,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83986 conditions, 11732 events. 7402/11732 cut-off events. For 588619/588621 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 78021 event pairs, 2829 based on Foata normal form. 2/11732 useless extension candidates. Maximal degree in co-relation 83876. Up to 10884 conditions per place. [2024-06-27 20:54:12,334 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 120 changer transitions 0/463 dead transitions. [2024-06-27 20:54:12,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 463 transitions, 8544 flow [2024-06-27 20:54:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:54:12,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:54:12,336 INFO L175 Difference]: Start difference. First operand has 235 places, 424 transitions, 7282 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:54:12,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 463 transitions, 8544 flow [2024-06-27 20:54:13,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 463 transitions, 8454 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:13,549 INFO L231 Difference]: Finished difference. Result has 239 places, 430 transitions, 7616 flow [2024-06-27 20:54:13,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7616, PETRI_PLACES=239, PETRI_TRANSITIONS=430} [2024-06-27 20:54:13,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:54:13,549 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 430 transitions, 7616 flow [2024-06-27 20:54:13,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:13,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:13,550 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 20:54:13,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:54:13,550 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:13,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1074401716, now seen corresponding path program 4 times [2024-06-27 20:54:13,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:13,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816702303] [2024-06-27 20:54:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:13,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:16,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816702303] [2024-06-27 20:54:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816702303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:16,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989995974] [2024-06-27 20:54:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:16,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:16,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:16,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:16,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 430 transitions, 7616 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:16,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:16,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:16,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:19,466 INFO L124 PetriNetUnfolderBase]: 7294/11593 cut-off events. [2024-06-27 20:54:19,466 INFO L125 PetriNetUnfolderBase]: For 606926/606928 co-relation queries the response was YES. [2024-06-27 20:54:19,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83140 conditions, 11593 events. 7294/11593 cut-off events. For 606926/606928 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 77224 event pairs, 2865 based on Foata normal form. 12/11603 useless extension candidates. Maximal degree in co-relation 83028. Up to 10895 conditions per place. [2024-06-27 20:54:19,583 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 345 selfloop transitions, 99 changer transitions 9/457 dead transitions. [2024-06-27 20:54:19,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 457 transitions, 8602 flow [2024-06-27 20:54:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:54:19,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:54:19,589 INFO L175 Difference]: Start difference. First operand has 239 places, 430 transitions, 7616 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:54:19,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 457 transitions, 8602 flow [2024-06-27 20:54:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 457 transitions, 8355 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:21,311 INFO L231 Difference]: Finished difference. Result has 243 places, 422 transitions, 7388 flow [2024-06-27 20:54:21,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7369, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7388, PETRI_PLACES=243, PETRI_TRANSITIONS=422} [2024-06-27 20:54:21,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 20:54:21,312 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 422 transitions, 7388 flow [2024-06-27 20:54:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:21,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:21,312 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 20:54:21,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:54:21,324 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:21,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1302182710, now seen corresponding path program 3 times [2024-06-27 20:54:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586584003] [2024-06-27 20:54:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:23,987 INFO 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 20:54:23,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586584003] [2024-06-27 20:54:23,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586584003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:23,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:23,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761368629] [2024-06-27 20:54:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:23,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:23,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:23,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:24,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:24,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 422 transitions, 7388 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:24,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:24,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:27,182 INFO L124 PetriNetUnfolderBase]: 7232/11420 cut-off events. [2024-06-27 20:54:27,182 INFO L125 PetriNetUnfolderBase]: For 631783/631785 co-relation queries the response was YES. [2024-06-27 20:54:27,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82941 conditions, 11420 events. 7232/11420 cut-off events. For 631783/631785 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 75241 event pairs, 2132 based on Foata normal form. 2/11420 useless extension candidates. Maximal degree in co-relation 82827. Up to 8651 conditions per place. [2024-06-27 20:54:27,318 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 289 changer transitions 0/484 dead transitions. [2024-06-27 20:54:27,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 484 transitions, 9348 flow [2024-06-27 20:54:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:54:27,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:54:27,319 INFO L175 Difference]: Start difference. First operand has 243 places, 422 transitions, 7388 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:54:27,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 484 transitions, 9348 flow [2024-06-27 20:54:29,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 484 transitions, 8740 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:54:29,013 INFO L231 Difference]: Finished difference. Result has 241 places, 443 transitions, 7978 flow [2024-06-27 20:54:29,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7978, PETRI_PLACES=241, PETRI_TRANSITIONS=443} [2024-06-27 20:54:29,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 20:54:29,014 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 443 transitions, 7978 flow [2024-06-27 20:54:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:29,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:29,014 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 20:54:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:54:29,014 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:29,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -539210862, now seen corresponding path program 4 times [2024-06-27 20:54:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:29,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064032833] [2024-06-27 20:54:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:31,753 INFO 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 20:54:31,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064032833] [2024-06-27 20:54:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064032833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:31,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478145181] [2024-06-27 20:54:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:31,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:31,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:31,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 443 transitions, 7978 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:31,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:31,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:31,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:35,046 INFO L124 PetriNetUnfolderBase]: 7226/11422 cut-off events. [2024-06-27 20:54:35,047 INFO L125 PetriNetUnfolderBase]: For 659227/659229 co-relation queries the response was YES. [2024-06-27 20:54:35,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86719 conditions, 11422 events. 7226/11422 cut-off events. For 659227/659229 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 75388 event pairs, 2133 based on Foata normal form. 2/11422 useless extension candidates. Maximal degree in co-relation 86603. Up to 8650 conditions per place. [2024-06-27 20:54:35,183 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 293 changer transitions 0/479 dead transitions. [2024-06-27 20:54:35,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 479 transitions, 9422 flow [2024-06-27 20:54:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:54:35,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:54:35,185 INFO L175 Difference]: Start difference. First operand has 241 places, 443 transitions, 7978 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:54:35,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 479 transitions, 9422 flow [2024-06-27 20:54:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 479 transitions, 9246 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-27 20:54:37,030 INFO L231 Difference]: Finished difference. Result has 247 places, 444 transitions, 8436 flow [2024-06-27 20:54:37,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8436, PETRI_PLACES=247, PETRI_TRANSITIONS=444} [2024-06-27 20:54:37,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:54:37,031 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 444 transitions, 8436 flow [2024-06-27 20:54:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:37,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:37,032 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 20:54:37,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:54:37,032 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:37,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1429080466, now seen corresponding path program 5 times [2024-06-27 20:54:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:37,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54264497] [2024-06-27 20:54:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:39,911 INFO 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 20:54:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54264497] [2024-06-27 20:54:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54264497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:39,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:39,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720695480] [2024-06-27 20:54:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:39,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:39,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:39,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 444 transitions, 8436 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:39,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:39,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:39,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:43,073 INFO L124 PetriNetUnfolderBase]: 7459/11763 cut-off events. [2024-06-27 20:54:43,074 INFO L125 PetriNetUnfolderBase]: For 722589/722591 co-relation queries the response was YES. [2024-06-27 20:54:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92220 conditions, 11763 events. 7459/11763 cut-off events. For 722589/722591 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 77619 event pairs, 2750 based on Foata normal form. 6/11767 useless extension candidates. Maximal degree in co-relation 92102. Up to 10767 conditions per place. [2024-06-27 20:54:43,211 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 341 selfloop transitions, 151 changer transitions 0/496 dead transitions. [2024-06-27 20:54:43,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 496 transitions, 10231 flow [2024-06-27 20:54:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:54:43,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:54:43,213 INFO L175 Difference]: Start difference. First operand has 247 places, 444 transitions, 8436 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:54:43,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 496 transitions, 10231 flow [2024-06-27 20:54:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 496 transitions, 9640 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:45,100 INFO L231 Difference]: Finished difference. Result has 253 places, 469 transitions, 8805 flow [2024-06-27 20:54:45,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7879, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8805, PETRI_PLACES=253, PETRI_TRANSITIONS=469} [2024-06-27 20:54:45,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 20:54:45,100 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 469 transitions, 8805 flow [2024-06-27 20:54:45,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:45,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:45,101 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 20:54:45,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:54:45,101 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:45,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash -423919692, now seen corresponding path program 5 times [2024-06-27 20:54:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:45,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195730497] [2024-06-27 20:54:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:48,184 INFO 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 20:54:48,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195730497] [2024-06-27 20:54:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195730497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:48,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:48,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:48,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093905268] [2024-06-27 20:54:48,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:48,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:48,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:48,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:48,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:48,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:48,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 469 transitions, 8805 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:48,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:48,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:48,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:51,462 INFO L124 PetriNetUnfolderBase]: 7441/11734 cut-off events. [2024-06-27 20:54:51,462 INFO L125 PetriNetUnfolderBase]: For 731583/731585 co-relation queries the response was YES. [2024-06-27 20:54:51,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91401 conditions, 11734 events. 7441/11734 cut-off events. For 731583/731585 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 77326 event pairs, 2758 based on Foata normal form. 6/11738 useless extension candidates. Maximal degree in co-relation 91280. Up to 10756 conditions per place. [2024-06-27 20:54:51,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 341 selfloop transitions, 151 changer transitions 0/496 dead transitions. [2024-06-27 20:54:51,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 496 transitions, 10075 flow [2024-06-27 20:54:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:54:51,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:54:51,608 INFO L175 Difference]: Start difference. First operand has 253 places, 469 transitions, 8805 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:54:51,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 496 transitions, 10075 flow [2024-06-27 20:54:53,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 496 transitions, 9884 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:53,661 INFO L231 Difference]: Finished difference. Result has 259 places, 469 transitions, 8923 flow [2024-06-27 20:54:53,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8614, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8923, PETRI_PLACES=259, PETRI_TRANSITIONS=469} [2024-06-27 20:54:53,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 20:54:53,661 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 469 transitions, 8923 flow [2024-06-27 20:54:53,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:53,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:53,662 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 20:54:53,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:54:53,662 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:53,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1428664756, now seen corresponding path program 6 times [2024-06-27 20:54:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:53,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016807178] [2024-06-27 20:54:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:56,618 INFO 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 20:54:56,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016807178] [2024-06-27 20:54:56,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016807178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:56,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:56,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:56,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585875335] [2024-06-27 20:54:56,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:56,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:56,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:56,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 469 transitions, 8923 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:56,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:56,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:56,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:59,777 INFO L124 PetriNetUnfolderBase]: 7415/11717 cut-off events. [2024-06-27 20:54:59,778 INFO L125 PetriNetUnfolderBase]: For 747750/747752 co-relation queries the response was YES. [2024-06-27 20:54:59,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91248 conditions, 11717 events. 7415/11717 cut-off events. For 747750/747752 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77555 event pairs, 2874 based on Foata normal form. 6/11721 useless extension candidates. Maximal degree in co-relation 91126. Up to 11109 conditions per place. [2024-06-27 20:54:59,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 99 changer transitions 3/492 dead transitions. [2024-06-27 20:54:59,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 492 transitions, 9965 flow [2024-06-27 20:54:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 20:54:59,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 20:54:59,922 INFO L175 Difference]: Start difference. First operand has 259 places, 469 transitions, 8923 flow. Second operand 9 states and 142 transitions. [2024-06-27 20:54:59,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 492 transitions, 9965 flow [2024-06-27 20:55:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 492 transitions, 9607 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:01,776 INFO L231 Difference]: Finished difference. Result has 261 places, 467 transitions, 8723 flow [2024-06-27 20:55:01,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8565, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8723, PETRI_PLACES=261, PETRI_TRANSITIONS=467} [2024-06-27 20:55:01,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 20:55:01,777 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 467 transitions, 8723 flow [2024-06-27 20:55:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:01,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:01,777 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 20:55:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:55:01,777 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -502990450, now seen corresponding path program 7 times [2024-06-27 20:55:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680063312] [2024-06-27 20:55:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:05,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680063312] [2024-06-27 20:55:05,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680063312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:05,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:05,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:05,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220605961] [2024-06-27 20:55:05,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:05,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:05,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:05,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:05,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 467 transitions, 8723 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:05,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:05,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:05,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:08,424 INFO L124 PetriNetUnfolderBase]: 7395/11738 cut-off events. [2024-06-27 20:55:08,424 INFO L125 PetriNetUnfolderBase]: For 765384/765400 co-relation queries the response was YES. [2024-06-27 20:55:08,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90846 conditions, 11738 events. 7395/11738 cut-off events. For 765384/765400 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 77909 event pairs, 2048 based on Foata normal form. 13/11749 useless extension candidates. Maximal degree in co-relation 90723. Up to 9035 conditions per place. [2024-06-27 20:55:08,580 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 263 changer transitions 0/498 dead transitions. [2024-06-27 20:55:08,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 498 transitions, 10209 flow [2024-06-27 20:55:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:55:08,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:55:08,582 INFO L175 Difference]: Start difference. First operand has 261 places, 467 transitions, 8723 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:55:08,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 498 transitions, 10209 flow [2024-06-27 20:55:10,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 498 transitions, 9980 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:10,432 INFO L231 Difference]: Finished difference. Result has 263 places, 470 transitions, 9087 flow [2024-06-27 20:55:10,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8494, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9087, PETRI_PLACES=263, PETRI_TRANSITIONS=470} [2024-06-27 20:55:10,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 20:55:10,433 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 470 transitions, 9087 flow [2024-06-27 20:55:10,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:10,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:10,433 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 20:55:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:55:10,433 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:10,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash -725593390, now seen corresponding path program 8 times [2024-06-27 20:55:10,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:10,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182994783] [2024-06-27 20:55:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:10,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:13,782 INFO 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 20:55:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:13,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182994783] [2024-06-27 20:55:13,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182994783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:13,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61797012] [2024-06-27 20:55:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:13,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:13,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:13,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 470 transitions, 9087 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:13,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:13,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:13,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:17,070 INFO L124 PetriNetUnfolderBase]: 7353/11627 cut-off events. [2024-06-27 20:55:17,071 INFO L125 PetriNetUnfolderBase]: For 790580/790582 co-relation queries the response was YES. [2024-06-27 20:55:17,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91741 conditions, 11627 events. 7353/11627 cut-off events. For 790580/790582 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 76906 event pairs, 2837 based on Foata normal form. 6/11631 useless extension candidates. Maximal degree in co-relation 91617. Up to 10899 conditions per place. [2024-06-27 20:55:17,211 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 118 changer transitions 3/500 dead transitions. [2024-06-27 20:55:17,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 500 transitions, 10171 flow [2024-06-27 20:55:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:55:17,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:55:17,213 INFO L175 Difference]: Start difference. First operand has 263 places, 470 transitions, 9087 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:55:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 500 transitions, 10171 flow [2024-06-27 20:55:19,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 500 transitions, 9764 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:19,354 INFO L231 Difference]: Finished difference. Result has 267 places, 468 transitions, 8891 flow [2024-06-27 20:55:19,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8680, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8891, PETRI_PLACES=267, PETRI_TRANSITIONS=468} [2024-06-27 20:55:19,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 20:55:19,358 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 468 transitions, 8891 flow [2024-06-27 20:55:19,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:19,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:19,358 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 20:55:19,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:55:19,358 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:19,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash -497276530, now seen corresponding path program 9 times [2024-06-27 20:55:19,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:19,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609811770] [2024-06-27 20:55:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:22,277 INFO 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 20:55:22,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609811770] [2024-06-27 20:55:22,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609811770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:22,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:22,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371744927] [2024-06-27 20:55:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:22,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 468 transitions, 8891 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:22,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:25,341 INFO L124 PetriNetUnfolderBase]: 7327/11626 cut-off events. [2024-06-27 20:55:25,341 INFO L125 PetriNetUnfolderBase]: For 810945/810961 co-relation queries the response was YES. [2024-06-27 20:55:25,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91454 conditions, 11626 events. 7327/11626 cut-off events. For 810945/810961 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 77012 event pairs, 2075 based on Foata normal form. 11/11635 useless extension candidates. Maximal degree in co-relation 91329. Up to 8936 conditions per place. [2024-06-27 20:55:25,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 279 changer transitions 0/502 dead transitions. [2024-06-27 20:55:25,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 502 transitions, 10484 flow [2024-06-27 20:55:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:55:25,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:55:25,487 INFO L175 Difference]: Start difference. First operand has 267 places, 468 transitions, 8891 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:55:25,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 502 transitions, 10484 flow [2024-06-27 20:55:27,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 502 transitions, 10238 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:55:27,540 INFO L231 Difference]: Finished difference. Result has 268 places, 475 transitions, 9402 flow [2024-06-27 20:55:27,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8657, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9402, PETRI_PLACES=268, PETRI_TRANSITIONS=475} [2024-06-27 20:55:27,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 20:55:27,542 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 475 transitions, 9402 flow [2024-06-27 20:55:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:27,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:27,542 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 20:55:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:55:27,542 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:27,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash -725177680, now seen corresponding path program 10 times [2024-06-27 20:55:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561501942] [2024-06-27 20:55:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:30,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561501942] [2024-06-27 20:55:30,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561501942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:30,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:30,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279241123] [2024-06-27 20:55:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:30,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:30,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:30,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 475 transitions, 9402 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:30,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:30,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:30,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:33,630 INFO L124 PetriNetUnfolderBase]: 7297/11536 cut-off events. [2024-06-27 20:55:33,630 INFO L125 PetriNetUnfolderBase]: For 794007/794009 co-relation queries the response was YES. [2024-06-27 20:55:33,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91639 conditions, 11536 events. 7297/11536 cut-off events. For 794007/794009 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 76013 event pairs, 1979 based on Foata normal form. 6/11540 useless extension candidates. Maximal degree in co-relation 91514. Up to 8920 conditions per place. [2024-06-27 20:55:33,785 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 321 changer transitions 0/515 dead transitions. [2024-06-27 20:55:33,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 515 transitions, 10915 flow [2024-06-27 20:55:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:55:33,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:55:33,788 INFO L175 Difference]: Start difference. First operand has 268 places, 475 transitions, 9402 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:55:33,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 515 transitions, 10915 flow [2024-06-27 20:55:36,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 515 transitions, 10472 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:36,302 INFO L231 Difference]: Finished difference. Result has 274 places, 476 transitions, 9729 flow [2024-06-27 20:55:36,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9729, PETRI_PLACES=274, PETRI_TRANSITIONS=476} [2024-06-27 20:55:36,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 20:55:36,303 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 476 transitions, 9729 flow [2024-06-27 20:55:36,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:36,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:36,303 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 20:55:36,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:55:36,304 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:36,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash -725356426, now seen corresponding path program 6 times [2024-06-27 20:55:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:36,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993004047] [2024-06-27 20:55:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:36,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:39,320 INFO 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 20:55:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993004047] [2024-06-27 20:55:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993004047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:39,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054615459] [2024-06-27 20:55:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:39,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:39,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 476 transitions, 9729 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:39,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:39,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:39,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:42,701 INFO L124 PetriNetUnfolderBase]: 7279/11519 cut-off events. [2024-06-27 20:55:42,701 INFO L125 PetriNetUnfolderBase]: For 814016/814018 co-relation queries the response was YES. [2024-06-27 20:55:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92522 conditions, 11519 events. 7279/11519 cut-off events. For 814016/814018 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 75969 event pairs, 1971 based on Foata normal form. 6/11523 useless extension candidates. Maximal degree in co-relation 92395. Up to 8915 conditions per place. [2024-06-27 20:55:42,852 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 326 changer transitions 0/519 dead transitions. [2024-06-27 20:55:42,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 519 transitions, 11229 flow [2024-06-27 20:55:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:55:42,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:55:42,865 INFO L175 Difference]: Start difference. First operand has 274 places, 476 transitions, 9729 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:55:42,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 519 transitions, 11229 flow [2024-06-27 20:55:45,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 519 transitions, 10653 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 20:55:45,674 INFO L231 Difference]: Finished difference. Result has 275 places, 476 transitions, 9827 flow [2024-06-27 20:55:45,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9159, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9827, PETRI_PLACES=275, PETRI_TRANSITIONS=476} [2024-06-27 20:55:45,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 20:55:45,675 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 476 transitions, 9827 flow [2024-06-27 20:55:45,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:45,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:45,675 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 20:55:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:55:45,675 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:45,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1346486358, now seen corresponding path program 11 times [2024-06-27 20:55:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:45,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742334658] [2024-06-27 20:55:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:48,984 INFO 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 20:55:48,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742334658] [2024-06-27 20:55:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742334658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:48,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296728318] [2024-06-27 20:55:48,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:48,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:48,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 476 transitions, 9827 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:48,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:48,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:52,044 INFO L124 PetriNetUnfolderBase]: 7267/11548 cut-off events. [2024-06-27 20:55:52,044 INFO L125 PetriNetUnfolderBase]: For 811277/811285 co-relation queries the response was YES. [2024-06-27 20:55:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92413 conditions, 11548 events. 7267/11548 cut-off events. For 811277/811285 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 76903 event pairs, 2604 based on Foata normal form. 10/11557 useless extension candidates. Maximal degree in co-relation 92286. Up to 9552 conditions per place. [2024-06-27 20:55:52,208 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 217 changer transitions 1/506 dead transitions. [2024-06-27 20:55:52,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 506 transitions, 11029 flow [2024-06-27 20:55:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:55:52,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:55:52,210 INFO L175 Difference]: Start difference. First operand has 275 places, 476 transitions, 9827 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:55:52,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 506 transitions, 11029 flow [2024-06-27 20:55:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 506 transitions, 10252 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 20:55:54,693 INFO L231 Difference]: Finished difference. Result has 273 places, 475 transitions, 9489 flow [2024-06-27 20:55:54,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9052, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9489, PETRI_PLACES=273, PETRI_TRANSITIONS=475} [2024-06-27 20:55:54,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 20:55:54,694 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 475 transitions, 9489 flow [2024-06-27 20:55:54,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:54,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:54,694 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 20:55:54,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:55:54,694 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:54,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash -812921330, now seen corresponding path program 12 times [2024-06-27 20:55:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:54,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284950791] [2024-06-27 20:55:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:57,775 INFO 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 20:55:57,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:57,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284950791] [2024-06-27 20:55:57,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284950791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:57,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:57,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:57,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565925055] [2024-06-27 20:55:57,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:57,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:57,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:57,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:57,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 475 transitions, 9489 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:00,916 INFO L124 PetriNetUnfolderBase]: 6983/10979 cut-off events. [2024-06-27 20:56:00,916 INFO L125 PetriNetUnfolderBase]: For 796395/796399 co-relation queries the response was YES. [2024-06-27 20:56:01,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88005 conditions, 10979 events. 6983/10979 cut-off events. For 796395/796399 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 71456 event pairs, 2415 based on Foata normal form. 14/10992 useless extension candidates. Maximal degree in co-relation 87878. Up to 9121 conditions per place. [2024-06-27 20:56:01,056 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 235 changer transitions 5/516 dead transitions. [2024-06-27 20:56:01,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 516 transitions, 10639 flow [2024-06-27 20:56:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:56:01,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:56:01,058 INFO L175 Difference]: Start difference. First operand has 273 places, 475 transitions, 9489 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:56:01,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 516 transitions, 10639 flow [2024-06-27 20:56:03,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 516 transitions, 10271 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:03,320 INFO L231 Difference]: Finished difference. Result has 275 places, 470 transitions, 9510 flow [2024-06-27 20:56:03,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9121, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9510, PETRI_PLACES=275, PETRI_TRANSITIONS=470} [2024-06-27 20:56:03,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 20:56:03,320 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 470 transitions, 9510 flow [2024-06-27 20:56:03,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:03,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:03,321 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 20:56:03,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:56:03,321 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:03,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash -502981522, now seen corresponding path program 2 times [2024-06-27 20:56:03,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:03,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547271488] [2024-06-27 20:56:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:07,216 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 20:56:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547271488] [2024-06-27 20:56:07,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547271488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:07,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:07,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129359787] [2024-06-27 20:56:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:07,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:07,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 470 transitions, 9510 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:07,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:07,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:07,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:10,213 INFO L124 PetriNetUnfolderBase]: 6327/9955 cut-off events. [2024-06-27 20:56:10,213 INFO L125 PetriNetUnfolderBase]: For 769085/769097 co-relation queries the response was YES. [2024-06-27 20:56:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84083 conditions, 9955 events. 6327/9955 cut-off events. For 769085/769097 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 63367 event pairs, 2250 based on Foata normal form. 14/9968 useless extension candidates. Maximal degree in co-relation 83956. Up to 9606 conditions per place. [2024-06-27 20:56:10,334 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 454 selfloop transitions, 31 changer transitions 0/489 dead transitions. [2024-06-27 20:56:10,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 489 transitions, 10590 flow [2024-06-27 20:56:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-27 20:56:10,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-27 20:56:10,348 INFO L175 Difference]: Start difference. First operand has 275 places, 470 transitions, 9510 flow. Second operand 7 states and 106 transitions. [2024-06-27 20:56:10,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 489 transitions, 10590 flow [2024-06-27 20:56:12,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 489 transitions, 9880 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-27 20:56:12,274 INFO L231 Difference]: Finished difference. Result has 269 places, 472 transitions, 8929 flow [2024-06-27 20:56:12,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8929, PETRI_PLACES=269, PETRI_TRANSITIONS=472} [2024-06-27 20:56:12,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 20:56:12,275 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 472 transitions, 8929 flow [2024-06-27 20:56:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:12,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:12,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:12,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:56:12,275 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:12,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -800639192, now seen corresponding path program 3 times [2024-06-27 20:56:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:12,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225332320] [2024-06-27 20:56:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:16,419 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 20:56:16,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225332320] [2024-06-27 20:56:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225332320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:16,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933717153] [2024-06-27 20:56:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:16,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:16,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 472 transitions, 8929 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:16,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:16,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:16,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:19,198 INFO L124 PetriNetUnfolderBase]: 6322/9924 cut-off events. [2024-06-27 20:56:19,198 INFO L125 PetriNetUnfolderBase]: For 730920/730932 co-relation queries the response was YES. [2024-06-27 20:56:19,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81440 conditions, 9924 events. 6322/9924 cut-off events. For 730920/730932 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63077 event pairs, 2237 based on Foata normal form. 14/9937 useless extension candidates. Maximal degree in co-relation 81316. Up to 9568 conditions per place. [2024-06-27 20:56:19,306 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 452 selfloop transitions, 38 changer transitions 0/494 dead transitions. [2024-06-27 20:56:19,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 494 transitions, 10193 flow [2024-06-27 20:56:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 20:56:19,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-27 20:56:19,307 INFO L175 Difference]: Start difference. First operand has 269 places, 472 transitions, 8929 flow. Second operand 7 states and 107 transitions. [2024-06-27 20:56:19,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 494 transitions, 10193 flow [2024-06-27 20:56:20,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 494 transitions, 10080 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:20,990 INFO L231 Difference]: Finished difference. Result has 272 places, 476 transitions, 9034 flow [2024-06-27 20:56:20,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8816, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9034, PETRI_PLACES=272, PETRI_TRANSITIONS=476} [2024-06-27 20:56:20,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 20:56:20,991 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 476 transitions, 9034 flow [2024-06-27 20:56:20,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:20,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:20,991 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 20:56:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:56:20,992 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:20,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash -902478832, now seen corresponding path program 4 times [2024-06-27 20:56:20,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:20,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386982435] [2024-06-27 20:56:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:20,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:24,703 INFO 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 20:56:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386982435] [2024-06-27 20:56:24,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386982435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:24,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:24,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79731761] [2024-06-27 20:56:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:24,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:24,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 476 transitions, 9034 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:24,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:24,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:24,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:27,705 INFO L124 PetriNetUnfolderBase]: 6317/9905 cut-off events. [2024-06-27 20:56:27,705 INFO L125 PetriNetUnfolderBase]: For 752407/752413 co-relation queries the response was YES. [2024-06-27 20:56:27,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81754 conditions, 9905 events. 6317/9905 cut-off events. For 752407/752413 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62850 event pairs, 2306 based on Foata normal form. 8/9912 useless extension candidates. Maximal degree in co-relation 81628. Up to 9598 conditions per place. [2024-06-27 20:56:27,815 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 466 selfloop transitions, 29 changer transitions 0/499 dead transitions. [2024-06-27 20:56:27,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 499 transitions, 10096 flow [2024-06-27 20:56:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:56:27,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:56:27,817 INFO L175 Difference]: Start difference. First operand has 272 places, 476 transitions, 9034 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:56:27,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 499 transitions, 10096 flow [2024-06-27 20:56:29,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 499 transitions, 9963 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:29,478 INFO L231 Difference]: Finished difference. Result has 276 places, 476 transitions, 8968 flow [2024-06-27 20:56:29,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8901, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8968, PETRI_PLACES=276, PETRI_TRANSITIONS=476} [2024-06-27 20:56:29,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 20:56:29,479 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 476 transitions, 8968 flow [2024-06-27 20:56:29,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:29,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:29,479 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 20:56:29,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:56:29,479 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:29,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash -542058894, now seen corresponding path program 1 times [2024-06-27 20:56:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:29,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759266245] [2024-06-27 20:56:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:32,667 INFO 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 20:56:32,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:32,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759266245] [2024-06-27 20:56:32,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759266245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:32,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:32,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456473335] [2024-06-27 20:56:32,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:32,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:32,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:32,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 476 transitions, 8968 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:32,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:32,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:32,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:35,817 INFO L124 PetriNetUnfolderBase]: 6397/10027 cut-off events. [2024-06-27 20:56:35,818 INFO L125 PetriNetUnfolderBase]: For 796700/796702 co-relation queries the response was YES. [2024-06-27 20:56:35,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83424 conditions, 10027 events. 6397/10027 cut-off events. For 796700/796702 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63601 event pairs, 2219 based on Foata normal form. 2/10028 useless extension candidates. Maximal degree in co-relation 83296. Up to 9485 conditions per place. [2024-06-27 20:56:35,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 48 changer transitions 0/518 dead transitions. [2024-06-27 20:56:35,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 518 transitions, 10364 flow [2024-06-27 20:56:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:56:35,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:56:35,938 INFO L175 Difference]: Start difference. First operand has 276 places, 476 transitions, 8968 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:56:35,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 518 transitions, 10364 flow [2024-06-27 20:56:37,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 518 transitions, 10298 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:37,735 INFO L231 Difference]: Finished difference. Result has 278 places, 480 transitions, 9131 flow [2024-06-27 20:56:37,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9131, PETRI_PLACES=278, PETRI_TRANSITIONS=480} [2024-06-27 20:56:37,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 20:56:37,736 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 480 transitions, 9131 flow [2024-06-27 20:56:37,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:37,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:37,737 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 20:56:37,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:56:37,737 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:37,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:37,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1310822968, now seen corresponding path program 2 times [2024-06-27 20:56:37,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:37,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064103648] [2024-06-27 20:56:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:37,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:40,992 INFO 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 20:56:40,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:40,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064103648] [2024-06-27 20:56:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064103648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:40,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:40,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609589294] [2024-06-27 20:56:40,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:40,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:40,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:41,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:41,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 480 transitions, 9131 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:41,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:41,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:41,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:44,297 INFO L124 PetriNetUnfolderBase]: 6405/10039 cut-off events. [2024-06-27 20:56:44,297 INFO L125 PetriNetUnfolderBase]: For 824873/824875 co-relation queries the response was YES. [2024-06-27 20:56:44,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84241 conditions, 10039 events. 6405/10039 cut-off events. For 824873/824875 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 63661 event pairs, 2263 based on Foata normal form. 2/10040 useless extension candidates. Maximal degree in co-relation 84112. Up to 9622 conditions per place. [2024-06-27 20:56:44,423 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 45 changer transitions 0/510 dead transitions. [2024-06-27 20:56:44,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 510 transitions, 10287 flow [2024-06-27 20:56:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:56:44,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:56:44,425 INFO L175 Difference]: Start difference. First operand has 278 places, 480 transitions, 9131 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:56:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 510 transitions, 10287 flow [2024-06-27 20:56:46,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 510 transitions, 10154 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:56:46,305 INFO L231 Difference]: Finished difference. Result has 282 places, 482 transitions, 9163 flow [2024-06-27 20:56:46,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9008, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9163, PETRI_PLACES=282, PETRI_TRANSITIONS=482} [2024-06-27 20:56:46,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 20:56:46,306 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 482 transitions, 9163 flow [2024-06-27 20:56:46,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:46,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:46,306 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 20:56:46,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:56:46,306 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:46,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash -5947678, now seen corresponding path program 3 times [2024-06-27 20:56:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:46,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630101245] [2024-06-27 20:56:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:46,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:49,497 INFO 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 20:56:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630101245] [2024-06-27 20:56:49,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630101245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:49,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:49,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:49,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046159318] [2024-06-27 20:56:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:49,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:49,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:49,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 482 transitions, 9163 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:49,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:49,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:49,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:52,809 INFO L124 PetriNetUnfolderBase]: 6457/10123 cut-off events. [2024-06-27 20:56:52,809 INFO L125 PetriNetUnfolderBase]: For 871811/871813 co-relation queries the response was YES. [2024-06-27 20:56:52,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85237 conditions, 10123 events. 6457/10123 cut-off events. For 871811/871813 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 64409 event pairs, 2409 based on Foata normal form. 14/10136 useless extension candidates. Maximal degree in co-relation 85106. Up to 9758 conditions per place. [2024-06-27 20:56:52,941 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 26 changer transitions 0/512 dead transitions. [2024-06-27 20:56:52,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 512 transitions, 10335 flow [2024-06-27 20:56:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 20:56:52,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 20:56:52,943 INFO L175 Difference]: Start difference. First operand has 282 places, 482 transitions, 9163 flow. Second operand 9 states and 140 transitions. [2024-06-27 20:56:52,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 512 transitions, 10335 flow [2024-06-27 20:56:55,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 512 transitions, 10200 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:55,615 INFO L231 Difference]: Finished difference. Result has 285 places, 484 transitions, 9150 flow [2024-06-27 20:56:55,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9150, PETRI_PLACES=285, PETRI_TRANSITIONS=484} [2024-06-27 20:56:55,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 20:56:55,615 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 484 transitions, 9150 flow [2024-06-27 20:56:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:55,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:55,616 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 20:56:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:56:55,616 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:55,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1429095346, now seen corresponding path program 1 times [2024-06-27 20:56:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:55,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610677844] [2024-06-27 20:56:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610677844] [2024-06-27 20:56:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610677844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:58,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:58,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115857313] [2024-06-27 20:56:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:58,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:58,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 484 transitions, 9150 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:58,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:58,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:58,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:01,804 INFO L124 PetriNetUnfolderBase]: 6509/10203 cut-off events. [2024-06-27 20:57:01,804 INFO L125 PetriNetUnfolderBase]: For 895437/895439 co-relation queries the response was YES. [2024-06-27 20:57:01,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85990 conditions, 10203 events. 6509/10203 cut-off events. For 895437/895439 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65028 event pairs, 2421 based on Foata normal form. 14/10216 useless extension candidates. Maximal degree in co-relation 85858. Up to 9838 conditions per place. [2024-06-27 20:57:01,928 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 26 changer transitions 0/514 dead transitions. [2024-06-27 20:57:01,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 514 transitions, 10302 flow [2024-06-27 20:57:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 20:57:01,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 20:57:01,930 INFO L175 Difference]: Start difference. First operand has 285 places, 484 transitions, 9150 flow. Second operand 9 states and 140 transitions. [2024-06-27 20:57:01,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 514 transitions, 10302 flow [2024-06-27 20:57:03,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 514 transitions, 10210 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:03,991 INFO L231 Difference]: Finished difference. Result has 287 places, 486 transitions, 9156 flow [2024-06-27 20:57:03,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9156, PETRI_PLACES=287, PETRI_TRANSITIONS=486} [2024-06-27 20:57:03,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:57:03,992 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 486 transitions, 9156 flow [2024-06-27 20:57:03,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:03,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:03,992 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 20:57:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:57:03,993 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:03,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1848302862, now seen corresponding path program 4 times [2024-06-27 20:57:03,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:03,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019300180] [2024-06-27 20:57:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:03,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:07,045 INFO 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 20:57:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:07,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019300180] [2024-06-27 20:57:07,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019300180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:07,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:07,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:07,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896656620] [2024-06-27 20:57:07,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:07,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:07,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:07,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 486 transitions, 9156 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:07,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:07,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:07,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:10,318 INFO L124 PetriNetUnfolderBase]: 6476/10152 cut-off events. [2024-06-27 20:57:10,318 INFO L125 PetriNetUnfolderBase]: For 895864/895866 co-relation queries the response was YES. [2024-06-27 20:57:10,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85213 conditions, 10152 events. 6476/10152 cut-off events. For 895864/895866 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 64523 event pairs, 2218 based on Foata normal form. 14/10165 useless extension candidates. Maximal degree in co-relation 85080. Up to 9627 conditions per place. [2024-06-27 20:57:10,445 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 46 changer transitions 0/523 dead transitions. [2024-06-27 20:57:10,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 523 transitions, 10320 flow [2024-06-27 20:57:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:57:10,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:57:10,447 INFO L175 Difference]: Start difference. First operand has 287 places, 486 transitions, 9156 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:57:10,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 523 transitions, 10320 flow [2024-06-27 20:57:12,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 523 transitions, 10210 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:12,812 INFO L231 Difference]: Finished difference. Result has 289 places, 486 transitions, 9151 flow [2024-06-27 20:57:12,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9046, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9151, PETRI_PLACES=289, PETRI_TRANSITIONS=486} [2024-06-27 20:57:12,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 20:57:12,813 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 486 transitions, 9151 flow [2024-06-27 20:57:12,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:12,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:12,813 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 20:57:12,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:57:12,814 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:12,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1848487560, now seen corresponding path program 2 times [2024-06-27 20:57:12,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:12,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827444676] [2024-06-27 20:57:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:12,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:16,092 INFO 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 20:57:16,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:16,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827444676] [2024-06-27 20:57:16,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827444676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:16,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931498120] [2024-06-27 20:57:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:16,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:16,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:16,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:16,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 486 transitions, 9151 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:16,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:16,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:16,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:19,116 INFO L124 PetriNetUnfolderBase]: 6528/10232 cut-off events. [2024-06-27 20:57:19,116 INFO L125 PetriNetUnfolderBase]: For 920441/920443 co-relation queries the response was YES. [2024-06-27 20:57:19,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86048 conditions, 10232 events. 6528/10232 cut-off events. For 920441/920443 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65052 event pairs, 2256 based on Foata normal form. 14/10245 useless extension candidates. Maximal degree in co-relation 85914. Up to 9729 conditions per place. [2024-06-27 20:57:19,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 474 selfloop transitions, 43 changer transitions 0/521 dead transitions. [2024-06-27 20:57:19,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 521 transitions, 10337 flow [2024-06-27 20:57:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:57:19,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:57:19,249 INFO L175 Difference]: Start difference. First operand has 289 places, 486 transitions, 9151 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:57:19,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 521 transitions, 10337 flow [2024-06-27 20:57:21,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 521 transitions, 10236 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:21,863 INFO L231 Difference]: Finished difference. Result has 290 places, 488 transitions, 9190 flow [2024-06-27 20:57:21,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9050, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9190, PETRI_PLACES=290, PETRI_TRANSITIONS=488} [2024-06-27 20:57:21,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 20:57:21,864 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 488 transitions, 9190 flow [2024-06-27 20:57:21,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:21,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:21,864 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 20:57:21,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:57:21,864 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:21,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash -488987440, now seen corresponding path program 3 times [2024-06-27 20:57:21,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:21,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553850596] [2024-06-27 20:57:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:21,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:25,004 INFO 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 20:57:25,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553850596] [2024-06-27 20:57:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553850596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:25,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:25,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:25,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910410221] [2024-06-27 20:57:25,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:25,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:25,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:25,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 488 transitions, 9190 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:25,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:25,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:25,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:28,050 INFO L124 PetriNetUnfolderBase]: 6536/10245 cut-off events. [2024-06-27 20:57:28,051 INFO L125 PetriNetUnfolderBase]: For 897451/897455 co-relation queries the response was YES. [2024-06-27 20:57:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86272 conditions, 10245 events. 6536/10245 cut-off events. For 897451/897455 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 65106 event pairs, 2245 based on Foata normal form. 4/10248 useless extension candidates. Maximal degree in co-relation 86137. Up to 9851 conditions per place. [2024-06-27 20:57:28,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 40 changer transitions 0/513 dead transitions. [2024-06-27 20:57:28,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 513 transitions, 10314 flow [2024-06-27 20:57:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:57:28,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 20:57:28,183 INFO L175 Difference]: Start difference. First operand has 290 places, 488 transitions, 9190 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:57:28,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 513 transitions, 10314 flow [2024-06-27 20:57:30,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 513 transitions, 10202 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:30,956 INFO L231 Difference]: Finished difference. Result has 291 places, 490 transitions, 9211 flow [2024-06-27 20:57:30,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9082, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9211, PETRI_PLACES=291, PETRI_TRANSITIONS=490} [2024-06-27 20:57:30,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 20:57:30,956 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 490 transitions, 9211 flow [2024-06-27 20:57:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:30,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:30,957 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 20:57:30,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:57:30,957 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:30,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash -488690770, now seen corresponding path program 4 times [2024-06-27 20:57:30,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:30,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920830615] [2024-06-27 20:57:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:34,392 INFO 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 20:57:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:34,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920830615] [2024-06-27 20:57:34,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920830615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219046043] [2024-06-27 20:57:34,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:34,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:34,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:34,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 490 transitions, 9211 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:34,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:34,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:34,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:37,580 INFO L124 PetriNetUnfolderBase]: 6531/10262 cut-off events. [2024-06-27 20:57:37,581 INFO L125 PetriNetUnfolderBase]: For 894821/894825 co-relation queries the response was YES. [2024-06-27 20:57:37,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85933 conditions, 10262 events. 6531/10262 cut-off events. For 894821/894825 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65406 event pairs, 2246 based on Foata normal form. 4/10265 useless extension candidates. Maximal degree in co-relation 85797. Up to 9714 conditions per place. [2024-06-27 20:57:37,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 47 changer transitions 0/520 dead transitions. [2024-06-27 20:57:37,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 520 transitions, 10383 flow [2024-06-27 20:57:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:57:37,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:57:37,711 INFO L175 Difference]: Start difference. First operand has 291 places, 490 transitions, 9211 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:57:37,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 520 transitions, 10383 flow [2024-06-27 20:57:39,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 520 transitions, 10270 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:39,671 INFO L231 Difference]: Finished difference. Result has 293 places, 492 transitions, 9245 flow [2024-06-27 20:57:39,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9245, PETRI_PLACES=293, PETRI_TRANSITIONS=492} [2024-06-27 20:57:39,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 20:57:39,672 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 492 transitions, 9245 flow [2024-06-27 20:57:39,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:39,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:39,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:39,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:57:39,672 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:39,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1517090771, now seen corresponding path program 1 times [2024-06-27 20:57:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:39,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084981258] [2024-06-27 20:57:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:43,227 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 20:57:43,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084981258] [2024-06-27 20:57:43,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084981258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:43,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293008979] [2024-06-27 20:57:43,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:43,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:43,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:43,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:43,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 492 transitions, 9245 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:43,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:43,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:43,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:46,810 INFO L124 PetriNetUnfolderBase]: 6921/10910 cut-off events. [2024-06-27 20:57:46,811 INFO L125 PetriNetUnfolderBase]: For 1093731/1093745 co-relation queries the response was YES. [2024-06-27 20:57:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91924 conditions, 10910 events. 6921/10910 cut-off events. For 1093731/1093745 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70489 event pairs, 1983 based on Foata normal form. 62/10971 useless extension candidates. Maximal degree in co-relation 91787. Up to 9599 conditions per place. [2024-06-27 20:57:46,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 445 selfloop transitions, 99 changer transitions 0/548 dead transitions. [2024-06-27 20:57:46,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 548 transitions, 10762 flow [2024-06-27 20:57:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:57:46,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:57:46,939 INFO L175 Difference]: Start difference. First operand has 293 places, 492 transitions, 9245 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:57:46,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 548 transitions, 10762 flow [2024-06-27 20:57:49,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 548 transitions, 10631 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:49,677 INFO L231 Difference]: Finished difference. Result has 298 places, 496 transitions, 9436 flow [2024-06-27 20:57:49,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9436, PETRI_PLACES=298, PETRI_TRANSITIONS=496} [2024-06-27 20:57:49,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-27 20:57:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 496 transitions, 9436 flow [2024-06-27 20:57:49,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:49,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:49,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:49,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:57:49,678 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:49,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1526613971, now seen corresponding path program 2 times [2024-06-27 20:57:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721731587] [2024-06-27 20:57:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:52,938 INFO 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 20:57:52,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:52,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721731587] [2024-06-27 20:57:52,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721731587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:52,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:52,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504129727] [2024-06-27 20:57:52,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:52,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:52,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 496 transitions, 9436 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:52,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:52,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:52,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:56,723 INFO L124 PetriNetUnfolderBase]: 7133/11250 cut-off events. [2024-06-27 20:57:56,724 INFO L125 PetriNetUnfolderBase]: For 1171488/1171502 co-relation queries the response was YES. [2024-06-27 20:57:56,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94052 conditions, 11250 events. 7133/11250 cut-off events. For 1171488/1171502 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 73162 event pairs, 2615 based on Foata normal form. 78/11327 useless extension candidates. Maximal degree in co-relation 93913. Up to 10267 conditions per place. [2024-06-27 20:57:56,863 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 101 changer transitions 8/540 dead transitions. [2024-06-27 20:57:56,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 540 transitions, 10688 flow [2024-06-27 20:57:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 20:57:56,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 20:57:56,864 INFO L175 Difference]: Start difference. First operand has 298 places, 496 transitions, 9436 flow. Second operand 10 states and 169 transitions. [2024-06-27 20:57:56,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 540 transitions, 10688 flow [2024-06-27 20:57:59,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 540 transitions, 10421 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:59,099 INFO L231 Difference]: Finished difference. Result has 302 places, 494 transitions, 9332 flow [2024-06-27 20:57:59,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9169, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9332, PETRI_PLACES=302, PETRI_TRANSITIONS=494} [2024-06-27 20:57:59,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:57:59,099 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 494 transitions, 9332 flow [2024-06-27 20:57:59,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:59,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:59,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:59,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:57:59,100 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:59,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1694192791, now seen corresponding path program 3 times [2024-06-27 20:57:59,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124496369] [2024-06-27 20:57:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:02,370 INFO 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 20:58:02,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:02,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124496369] [2024-06-27 20:58:02,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124496369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:02,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:02,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:02,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42825944] [2024-06-27 20:58:02,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:02,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:02,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:02,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 494 transitions, 9332 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:02,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:02,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:02,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:06,050 INFO L124 PetriNetUnfolderBase]: 7281/11514 cut-off events. [2024-06-27 20:58:06,050 INFO L125 PetriNetUnfolderBase]: For 1180405/1180419 co-relation queries the response was YES. [2024-06-27 20:58:06,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94551 conditions, 11514 events. 7281/11514 cut-off events. For 1180405/1180419 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 75588 event pairs, 2667 based on Foata normal form. 70/11583 useless extension candidates. Maximal degree in co-relation 94411. Up to 10247 conditions per place. [2024-06-27 20:58:06,227 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 98 changer transitions 18/550 dead transitions. [2024-06-27 20:58:06,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 550 transitions, 10694 flow [2024-06-27 20:58:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:58:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:58:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:58:06,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:58:06,228 INFO L175 Difference]: Start difference. First operand has 302 places, 494 transitions, 9332 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:58:06,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 550 transitions, 10694 flow [2024-06-27 20:58:08,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 10497 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:08,810 INFO L231 Difference]: Finished difference. Result has 306 places, 491 transitions, 9215 flow [2024-06-27 20:58:08,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9135, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9215, PETRI_PLACES=306, PETRI_TRANSITIONS=491} [2024-06-27 20:58:08,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 20:58:08,810 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 491 transitions, 9215 flow [2024-06-27 20:58:08,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:08,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:08,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:58:08,811 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:08,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1739748951, now seen corresponding path program 4 times [2024-06-27 20:58:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203551742] [2024-06-27 20:58:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:12,311 INFO 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 20:58:12,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:12,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203551742] [2024-06-27 20:58:12,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203551742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:12,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:12,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539475464] [2024-06-27 20:58:12,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:12,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:12,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 491 transitions, 9215 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:12,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:12,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:12,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:15,741 INFO L124 PetriNetUnfolderBase]: 7189/11370 cut-off events. [2024-06-27 20:58:15,741 INFO L125 PetriNetUnfolderBase]: For 1234964/1234972 co-relation queries the response was YES. [2024-06-27 20:58:15,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94631 conditions, 11370 events. 7189/11370 cut-off events. For 1234964/1234972 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 74555 event pairs, 2584 based on Foata normal form. 70/11439 useless extension candidates. Maximal degree in co-relation 94489. Up to 9791 conditions per place. [2024-06-27 20:58:15,905 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 369 selfloop transitions, 141 changer transitions 14/528 dead transitions. [2024-06-27 20:58:15,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 528 transitions, 10421 flow [2024-06-27 20:58:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:58:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:58:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 20:58:15,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:58:15,907 INFO L175 Difference]: Start difference. First operand has 306 places, 491 transitions, 9215 flow. Second operand 10 states and 165 transitions. [2024-06-27 20:58:15,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 528 transitions, 10421 flow [2024-06-27 20:58:18,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 528 transitions, 10210 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:58:18,553 INFO L231 Difference]: Finished difference. Result has 306 places, 483 transitions, 9090 flow [2024-06-27 20:58:18,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9090, PETRI_PLACES=306, PETRI_TRANSITIONS=483} [2024-06-27 20:58:18,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 20:58:18,554 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 483 transitions, 9090 flow [2024-06-27 20:58:18,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:18,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:18,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:58:18,555 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:18,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1390293723, now seen corresponding path program 5 times [2024-06-27 20:58:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:18,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530455081] [2024-06-27 20:58:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:21,950 INFO 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 20:58:21,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530455081] [2024-06-27 20:58:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530455081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:21,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:21,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068180148] [2024-06-27 20:58:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:21,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:21,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 483 transitions, 9090 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:21,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:21,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:21,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:25,594 INFO L124 PetriNetUnfolderBase]: 7081/11234 cut-off events. [2024-06-27 20:58:25,594 INFO L125 PetriNetUnfolderBase]: For 1266770/1266778 co-relation queries the response was YES. [2024-06-27 20:58:25,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93675 conditions, 11234 events. 7081/11234 cut-off events. For 1266770/1266778 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 73923 event pairs, 2626 based on Foata normal form. 70/11303 useless extension candidates. Maximal degree in co-relation 93533. Up to 9803 conditions per place. [2024-06-27 20:58:25,780 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 147 changer transitions 9/522 dead transitions. [2024-06-27 20:58:25,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 522 transitions, 10292 flow [2024-06-27 20:58:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:58:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:58:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 20:58:25,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:58:25,782 INFO L175 Difference]: Start difference. First operand has 306 places, 483 transitions, 9090 flow. Second operand 11 states and 180 transitions. [2024-06-27 20:58:25,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 522 transitions, 10292 flow [2024-06-27 20:58:28,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 522 transitions, 10019 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:58:28,251 INFO L231 Difference]: Finished difference. Result has 309 places, 480 transitions, 9064 flow [2024-06-27 20:58:28,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8817, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9064, PETRI_PLACES=309, PETRI_TRANSITIONS=480} [2024-06-27 20:58:28,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 20:58:28,251 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 480 transitions, 9064 flow [2024-06-27 20:58:28,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:28,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:28,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:58:28,252 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:28,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1728697761, now seen corresponding path program 6 times [2024-06-27 20:58:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098498847] [2024-06-27 20:58:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:31,666 INFO 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 20:58:31,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098498847] [2024-06-27 20:58:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098498847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:31,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:31,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599211247] [2024-06-27 20:58:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:31,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:31,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:31,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:31,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 480 transitions, 9064 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:31,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:31,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:31,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:35,113 INFO L124 PetriNetUnfolderBase]: 7257/11546 cut-off events. [2024-06-27 20:58:35,114 INFO L125 PetriNetUnfolderBase]: For 1279552/1279560 co-relation queries the response was YES. [2024-06-27 20:58:35,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94749 conditions, 11546 events. 7257/11546 cut-off events. For 1279552/1279560 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76648 event pairs, 2688 based on Foata normal form. 62/11607 useless extension candidates. Maximal degree in co-relation 94607. Up to 9723 conditions per place. [2024-06-27 20:58:35,278 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 363 selfloop transitions, 131 changer transitions 33/531 dead transitions. [2024-06-27 20:58:35,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 531 transitions, 10384 flow [2024-06-27 20:58:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:58:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:58:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 20:58:35,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-27 20:58:35,280 INFO L175 Difference]: Start difference. First operand has 309 places, 480 transitions, 9064 flow. Second operand 11 states and 184 transitions. [2024-06-27 20:58:35,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 531 transitions, 10384 flow [2024-06-27 20:58:38,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 531 transitions, 10081 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:58:38,451 INFO L231 Difference]: Finished difference. Result has 312 places, 463 transitions, 8630 flow [2024-06-27 20:58:38,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8761, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8630, PETRI_PLACES=312, PETRI_TRANSITIONS=463} [2024-06-27 20:58:38,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:58:38,452 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 463 transitions, 8630 flow [2024-06-27 20:58:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:38,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:38,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:38,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:58:38,453 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:38,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash 853473467, now seen corresponding path program 1 times [2024-06-27 20:58:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:38,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49238092] [2024-06-27 20:58:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:41,219 INFO 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 20:58:41,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:41,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49238092] [2024-06-27 20:58:41,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49238092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:41,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:41,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:41,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576116182] [2024-06-27 20:58:41,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:41,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:41,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:41,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:41,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 463 transitions, 8630 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 20:58:41,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:41,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:41,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:44,638 INFO L124 PetriNetUnfolderBase]: 6807/10814 cut-off events. [2024-06-27 20:58:44,638 INFO L125 PetriNetUnfolderBase]: For 1184027/1184041 co-relation queries the response was YES. [2024-06-27 20:58:44,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91889 conditions, 10814 events. 6807/10814 cut-off events. For 1184027/1184041 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70799 event pairs, 2508 based on Foata normal form. 16/10829 useless extension candidates. Maximal degree in co-relation 91745. Up to 9132 conditions per place. [2024-06-27 20:58:44,791 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 306 selfloop transitions, 210 changer transitions 0/520 dead transitions. [2024-06-27 20:58:44,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 520 transitions, 10240 flow [2024-06-27 20:58:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:58:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:58:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:58:44,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:58:44,794 INFO L175 Difference]: Start difference. First operand has 312 places, 463 transitions, 8630 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:58:44,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 520 transitions, 10240 flow [2024-06-27 20:58:47,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 520 transitions, 9942 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 20:58:47,620 INFO L231 Difference]: Finished difference. Result has 312 places, 466 transitions, 8841 flow [2024-06-27 20:58:47,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8332, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8841, PETRI_PLACES=312, PETRI_TRANSITIONS=466} [2024-06-27 20:58:47,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:58:47,621 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 466 transitions, 8841 flow [2024-06-27 20:58:47,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 20:58:47,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:47,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:47,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:58:47,622 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:47,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash 858835847, now seen corresponding path program 2 times [2024-06-27 20:58:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:47,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268178937] [2024-06-27 20:58:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:50,509 INFO 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 20:58:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:50,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268178937] [2024-06-27 20:58:50,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268178937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:50,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116789761] [2024-06-27 20:58:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:50,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:50,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 466 transitions, 8841 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 20:58:50,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:50,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:50,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:53,909 INFO L124 PetriNetUnfolderBase]: 6817/10824 cut-off events. [2024-06-27 20:58:53,909 INFO L125 PetriNetUnfolderBase]: For 1213138/1213146 co-relation queries the response was YES. [2024-06-27 20:58:54,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92882 conditions, 10824 events. 6817/10824 cut-off events. For 1213138/1213146 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70836 event pairs, 2462 based on Foata normal form. 8/10831 useless extension candidates. Maximal degree in co-relation 92738. Up to 9138 conditions per place. [2024-06-27 20:58:54,038 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 196 changer transitions 0/509 dead transitions. [2024-06-27 20:58:54,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 509 transitions, 10415 flow [2024-06-27 20:58:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:58:54,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:58:54,040 INFO L175 Difference]: Start difference. First operand has 312 places, 466 transitions, 8841 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:58:54,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 509 transitions, 10415 flow [2024-06-27 20:58:56,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 509 transitions, 9886 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 20:58:56,609 INFO L231 Difference]: Finished difference. Result has 313 places, 472 transitions, 8885 flow [2024-06-27 20:58:56,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8324, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8885, PETRI_PLACES=313, PETRI_TRANSITIONS=472} [2024-06-27 20:58:56,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 20:58:56,610 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 472 transitions, 8885 flow [2024-06-27 20:58:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 20:58:56,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:56,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:56,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:58:56,611 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:56,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 532685587, now seen corresponding path program 3 times [2024-06-27 20:58:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036111344] [2024-06-27 20:58:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:59,515 INFO 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 20:58:59,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036111344] [2024-06-27 20:58:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036111344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:59,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:59,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401068701] [2024-06-27 20:58:59,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:59,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:59,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:59,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:59,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 472 transitions, 8885 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 20:58:59,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:59,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:59,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:02,926 INFO L124 PetriNetUnfolderBase]: 6811/10812 cut-off events. [2024-06-27 20:59:02,926 INFO L125 PetriNetUnfolderBase]: For 1239023/1239031 co-relation queries the response was YES. [2024-06-27 20:59:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92960 conditions, 10812 events. 6811/10812 cut-off events. For 1239023/1239031 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70699 event pairs, 2464 based on Foata normal form. 8/10819 useless extension candidates. Maximal degree in co-relation 92815. Up to 9135 conditions per place. [2024-06-27 20:59:03,100 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 302 selfloop transitions, 197 changer transitions 0/503 dead transitions. [2024-06-27 20:59:03,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 503 transitions, 10113 flow [2024-06-27 20:59:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:59:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:59:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:59:03,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:59:03,101 INFO L175 Difference]: Start difference. First operand has 313 places, 472 transitions, 8885 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:59:03,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 503 transitions, 10113 flow [2024-06-27 20:59:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 503 transitions, 9843 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:06,518 INFO L231 Difference]: Finished difference. Result has 318 places, 472 transitions, 9016 flow [2024-06-27 20:59:06,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8615, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9016, PETRI_PLACES=318, PETRI_TRANSITIONS=472} [2024-06-27 20:59:06,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:59:06,519 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 472 transitions, 9016 flow [2024-06-27 20:59:06,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 20:59:06,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:06,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:06,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:59:06,520 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:06,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1708335341, now seen corresponding path program 1 times [2024-06-27 20:59:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:06,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812967640] [2024-06-27 20:59:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:06,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:09,817 INFO 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 20:59:09,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:09,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812967640] [2024-06-27 20:59:09,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812967640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:09,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:09,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:09,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789626672] [2024-06-27 20:59:09,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:09,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:09,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:09,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:59:09,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 472 transitions, 9016 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:09,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:09,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:59:09,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:13,521 INFO L124 PetriNetUnfolderBase]: 6787/10780 cut-off events. [2024-06-27 20:59:13,521 INFO L125 PetriNetUnfolderBase]: For 1269269/1269273 co-relation queries the response was YES. [2024-06-27 20:59:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93338 conditions, 10780 events. 6787/10780 cut-off events. For 1269269/1269273 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70500 event pairs, 2486 based on Foata normal form. 10/10789 useless extension candidates. Maximal degree in co-relation 93191. Up to 9123 conditions per place. [2024-06-27 20:59:13,680 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 213 changer transitions 0/518 dead transitions. [2024-06-27 20:59:13,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 518 transitions, 10326 flow [2024-06-27 20:59:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:59:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:59:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 20:59:13,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-27 20:59:13,682 INFO L175 Difference]: Start difference. First operand has 318 places, 472 transitions, 9016 flow. Second operand 11 states and 190 transitions. [2024-06-27 20:59:13,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 518 transitions, 10326 flow [2024-06-27 20:59:17,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 518 transitions, 9881 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:59:17,082 INFO L231 Difference]: Finished difference. Result has 321 places, 472 transitions, 9004 flow [2024-06-27 20:59:17,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8571, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9004, PETRI_PLACES=321, PETRI_TRANSITIONS=472} [2024-06-27 20:59:17,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-27 20:59:17,083 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 472 transitions, 9004 flow [2024-06-27 20:59:17,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:17,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:17,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:17,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:59:17,083 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:17,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1379169249, now seen corresponding path program 1 times [2024-06-27 20:59:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:17,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753454828] [2024-06-27 20:59:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:21,172 INFO 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 20:59:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753454828] [2024-06-27 20:59:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753454828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:21,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:21,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:59:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058638089] [2024-06-27 20:59:21,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:21,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:59:21,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:59:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:59:21,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:59:21,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 472 transitions, 9004 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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 20:59:21,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:21,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:59:21,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:24,914 INFO L124 PetriNetUnfolderBase]: 7511/11962 cut-off events. [2024-06-27 20:59:24,915 INFO L125 PetriNetUnfolderBase]: For 1669281/1669289 co-relation queries the response was YES. [2024-06-27 20:59:25,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106229 conditions, 11962 events. 7511/11962 cut-off events. For 1669281/1669289 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79769 event pairs, 2674 based on Foata normal form. 54/12015 useless extension candidates. Maximal degree in co-relation 106081. Up to 9479 conditions per place. [2024-06-27 20:59:25,080 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 132 changer transitions 0/522 dead transitions. [2024-06-27 20:59:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 522 transitions, 10539 flow [2024-06-27 20:59:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:59:25,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:59:25,081 INFO L175 Difference]: Start difference. First operand has 321 places, 472 transitions, 9004 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:59:25,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 522 transitions, 10539 flow [2024-06-27 20:59:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 522 transitions, 10055 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 20:59:28,869 INFO L231 Difference]: Finished difference. Result has 322 places, 480 transitions, 9036 flow [2024-06-27 20:59:28,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8520, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9036, PETRI_PLACES=322, PETRI_TRANSITIONS=480} [2024-06-27 20:59:28,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:59:28,870 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 480 transitions, 9036 flow [2024-06-27 20:59:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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 20:59:28,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:28,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:28,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:59:28,870 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:28,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash 565747621, now seen corresponding path program 7 times [2024-06-27 20:59:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697603089] [2024-06-27 20:59:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:32,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697603089] [2024-06-27 20:59:32,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697603089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098193852] [2024-06-27 20:59:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:32,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:59:32,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 480 transitions, 9036 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:32,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:32,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:59:32,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:37,242 INFO L124 PetriNetUnfolderBase]: 7723/12314 cut-off events. [2024-06-27 20:59:37,242 INFO L125 PetriNetUnfolderBase]: For 1777266/1777280 co-relation queries the response was YES. [2024-06-27 20:59:37,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108311 conditions, 12314 events. 7723/12314 cut-off events. For 1777266/1777280 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 82842 event pairs, 2932 based on Foata normal form. 78/12391 useless extension candidates. Maximal degree in co-relation 108161. Up to 10323 conditions per place. [2024-06-27 20:59:37,398 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 324 selfloop transitions, 200 changer transitions 8/536 dead transitions. [2024-06-27 20:59:37,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 536 transitions, 10340 flow [2024-06-27 20:59:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:59:37,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:59:37,400 INFO L175 Difference]: Start difference. First operand has 322 places, 480 transitions, 9036 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:59:37,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 536 transitions, 10340 flow [2024-06-27 20:59:40,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 536 transitions, 10134 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:40,806 INFO L231 Difference]: Finished difference. Result has 326 places, 478 transitions, 9225 flow [2024-06-27 20:59:40,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9225, PETRI_PLACES=326, PETRI_TRANSITIONS=478} [2024-06-27 20:59:40,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 20:59:40,807 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 478 transitions, 9225 flow [2024-06-27 20:59:40,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:40,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:40,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:59:40,807 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:40,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2076477507, now seen corresponding path program 8 times [2024-06-27 20:59:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:40,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520522772] [2024-06-27 20:59:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:40,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:44,186 INFO 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 20:59:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520522772] [2024-06-27 20:59:44,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520522772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:44,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:44,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:44,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549994737] [2024-06-27 20:59:44,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:44,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:44,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:44,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:59:44,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 478 transitions, 9225 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:44,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:44,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:59:44,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:48,295 INFO L124 PetriNetUnfolderBase]: 7715/12322 cut-off events. [2024-06-27 20:59:48,295 INFO L125 PetriNetUnfolderBase]: For 1801231/1801245 co-relation queries the response was YES. [2024-06-27 20:59:48,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109463 conditions, 12322 events. 7715/12322 cut-off events. For 1801231/1801245 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 82991 event pairs, 2386 based on Foata normal form. 70/12391 useless extension candidates. Maximal degree in co-relation 109311. Up to 8587 conditions per place. [2024-06-27 20:59:48,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 318 selfloop transitions, 204 changer transitions 19/545 dead transitions. [2024-06-27 20:59:48,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 545 transitions, 10763 flow [2024-06-27 20:59:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:59:48,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 20:59:48,460 INFO L175 Difference]: Start difference. First operand has 326 places, 478 transitions, 9225 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:59:48,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 545 transitions, 10763 flow [2024-06-27 20:59:52,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 545 transitions, 10338 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:59:53,006 INFO L231 Difference]: Finished difference. Result has 328 places, 465 transitions, 9005 flow [2024-06-27 20:59:53,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8812, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9005, PETRI_PLACES=328, PETRI_TRANSITIONS=465} [2024-06-27 20:59:53,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 20:59:53,007 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 465 transitions, 9005 flow [2024-06-27 20:59:53,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:53,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:53,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:53,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:59:53,008 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:53,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1587043419, now seen corresponding path program 9 times [2024-06-27 20:59:53,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:53,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866135659] [2024-06-27 20:59:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:53,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:56,615 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 20:59:56,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:56,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866135659] [2024-06-27 20:59:56,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866135659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:56,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:56,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667813781] [2024-06-27 20:59:56,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:56,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:56,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:56,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:59:56,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 465 transitions, 9005 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:56,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:56,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:59:56,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:00,775 INFO L124 PetriNetUnfolderBase]: 7584/12103 cut-off events. [2024-06-27 21:00:00,776 INFO L125 PetriNetUnfolderBase]: For 1758697/1758713 co-relation queries the response was YES. [2024-06-27 21:00:00,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107690 conditions, 12103 events. 7584/12103 cut-off events. For 1758697/1758713 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 81014 event pairs, 2442 based on Foata normal form. 73/12174 useless extension candidates. Maximal degree in co-relation 107537. Up to 9684 conditions per place. [2024-06-27 21:00:00,958 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 263 selfloop transitions, 231 changer transitions 5/503 dead transitions. [2024-06-27 21:00:00,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 503 transitions, 10483 flow [2024-06-27 21:00:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:00:00,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:00:00,960 INFO L175 Difference]: Start difference. First operand has 328 places, 465 transitions, 9005 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:00:00,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 503 transitions, 10483 flow [2024-06-27 21:00:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 503 transitions, 10028 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 21:00:05,092 INFO L231 Difference]: Finished difference. Result has 327 places, 466 transitions, 9072 flow [2024-06-27 21:00:05,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8550, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9072, PETRI_PLACES=327, PETRI_TRANSITIONS=466} [2024-06-27 21:00:05,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-27 21:00:05,093 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 466 transitions, 9072 flow [2024-06-27 21:00:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:05,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:05,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:00:05,094 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:05,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2087528697, now seen corresponding path program 10 times [2024-06-27 21:00:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212787592] [2024-06-27 21:00:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:09,521 INFO 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 21:00:09,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212787592] [2024-06-27 21:00:09,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212787592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:09,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:09,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974834114] [2024-06-27 21:00:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:09,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:09,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:09,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:09,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 466 transitions, 9072 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:09,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:09,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:09,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:13,411 INFO L124 PetriNetUnfolderBase]: 7384/11799 cut-off events. [2024-06-27 21:00:13,412 INFO L125 PetriNetUnfolderBase]: For 1622818/1622826 co-relation queries the response was YES. [2024-06-27 21:00:13,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102076 conditions, 11799 events. 7384/11799 cut-off events. For 1622818/1622826 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 79182 event pairs, 2760 based on Foata normal form. 70/11868 useless extension candidates. Maximal degree in co-relation 101924. Up to 9965 conditions per place. [2024-06-27 21:00:13,780 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 319 selfloop transitions, 171 changer transitions 10/504 dead transitions. [2024-06-27 21:00:13,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 504 transitions, 10204 flow [2024-06-27 21:00:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:00:13,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:00:13,782 INFO L175 Difference]: Start difference. First operand has 327 places, 466 transitions, 9072 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:00:13,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 504 transitions, 10204 flow [2024-06-27 21:00:17,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 504 transitions, 9692 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:17,675 INFO L231 Difference]: Finished difference. Result has 329 places, 460 transitions, 8790 flow [2024-06-27 21:00:17,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8560, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8790, PETRI_PLACES=329, PETRI_TRANSITIONS=460} [2024-06-27 21:00:17,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 21:00:17,676 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 460 transitions, 8790 flow [2024-06-27 21:00:17,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:17,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:17,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:17,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:00:17,677 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:17,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 515704565, now seen corresponding path program 4 times [2024-06-27 21:00:17,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:17,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775098396] [2024-06-27 21:00:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:20,955 INFO 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 21:00:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775098396] [2024-06-27 21:00:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775098396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:20,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:20,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196506359] [2024-06-27 21:00:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:20,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:20,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:20,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:20,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 460 transitions, 8790 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 21:00:20,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:20,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:25,099 INFO L124 PetriNetUnfolderBase]: 7060/11283 cut-off events. [2024-06-27 21:00:25,099 INFO L125 PetriNetUnfolderBase]: For 1473230/1473246 co-relation queries the response was YES. [2024-06-27 21:00:25,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99718 conditions, 11283 events. 7060/11283 cut-off events. For 1473230/1473246 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 74828 event pairs, 2441 based on Foata normal form. 11/11292 useless extension candidates. Maximal degree in co-relation 99565. Up to 8899 conditions per place. [2024-06-27 21:00:25,247 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 239 changer transitions 0/506 dead transitions. [2024-06-27 21:00:25,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 506 transitions, 10572 flow [2024-06-27 21:00:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:00:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:00:25,249 INFO L175 Difference]: Start difference. First operand has 329 places, 460 transitions, 8790 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:00:25,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 506 transitions, 10572 flow [2024-06-27 21:00:29,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 506 transitions, 10130 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:00:29,006 INFO L231 Difference]: Finished difference. Result has 328 places, 469 transitions, 9054 flow [2024-06-27 21:00:29,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9054, PETRI_PLACES=328, PETRI_TRANSITIONS=469} [2024-06-27 21:00:29,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 21:00:29,007 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 469 transitions, 9054 flow [2024-06-27 21:00:29,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 21:00:29,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:29,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:00:29,008 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:29,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -628157515, now seen corresponding path program 2 times [2024-06-27 21:00:29,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:29,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133415254] [2024-06-27 21:00:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:29,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133415254] [2024-06-27 21:00:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133415254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:32,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:32,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533506200] [2024-06-27 21:00:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:32,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:32,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:32,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 469 transitions, 9054 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:32,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:32,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:32,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:36,634 INFO L124 PetriNetUnfolderBase]: 7048/11263 cut-off events. [2024-06-27 21:00:36,634 INFO L125 PetriNetUnfolderBase]: For 1469421/1469423 co-relation queries the response was YES. [2024-06-27 21:00:36,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99369 conditions, 11263 events. 7048/11263 cut-off events. For 1469421/1469423 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 74865 event pairs, 2781 based on Foata normal form. 4/11265 useless extension candidates. Maximal degree in co-relation 99215. Up to 10577 conditions per place. [2024-06-27 21:00:36,798 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 394 selfloop transitions, 105 changer transitions 0/503 dead transitions. [2024-06-27 21:00:36,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 503 transitions, 10152 flow [2024-06-27 21:00:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:00:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:00:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 21:00:36,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:00:36,800 INFO L175 Difference]: Start difference. First operand has 328 places, 469 transitions, 9054 flow. Second operand 10 states and 160 transitions. [2024-06-27 21:00:36,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 503 transitions, 10152 flow [2024-06-27 21:00:40,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 503 transitions, 9722 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:40,344 INFO L231 Difference]: Finished difference. Result has 333 places, 469 transitions, 8840 flow [2024-06-27 21:00:40,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8624, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8840, PETRI_PLACES=333, PETRI_TRANSITIONS=469} [2024-06-27 21:00:40,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 21:00:40,345 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 469 transitions, 8840 flow [2024-06-27 21:00:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:40,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:40,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:40,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:00:40,345 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:40,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1712959849, now seen corresponding path program 3 times [2024-06-27 21:00:40,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:40,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632336606] [2024-06-27 21:00:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:43,722 INFO 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 21:00:43,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:43,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632336606] [2024-06-27 21:00:43,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632336606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:43,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:43,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223125621] [2024-06-27 21:00:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:43,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:43,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:43,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:43,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 469 transitions, 8840 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:43,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:43,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:43,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:48,058 INFO L124 PetriNetUnfolderBase]: 7068/11247 cut-off events. [2024-06-27 21:00:48,058 INFO L125 PetriNetUnfolderBase]: For 1433815/1433817 co-relation queries the response was YES. [2024-06-27 21:00:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97595 conditions, 11247 events. 7068/11247 cut-off events. For 1433815/1433817 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74137 event pairs, 2273 based on Foata normal form. 4/11249 useless extension candidates. Maximal degree in co-relation 97441. Up to 8903 conditions per place. [2024-06-27 21:00:48,202 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 230 selfloop transitions, 280 changer transitions 0/514 dead transitions. [2024-06-27 21:00:48,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 514 transitions, 10509 flow [2024-06-27 21:00:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:00:48,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:00:48,203 INFO L175 Difference]: Start difference. First operand has 333 places, 469 transitions, 8840 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:00:48,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 514 transitions, 10509 flow [2024-06-27 21:00:52,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 514 transitions, 10278 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:00:52,217 INFO L231 Difference]: Finished difference. Result has 333 places, 472 transitions, 9248 flow [2024-06-27 21:00:52,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8609, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9248, PETRI_PLACES=333, PETRI_TRANSITIONS=472} [2024-06-27 21:00:52,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 21:00:52,217 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 472 transitions, 9248 flow [2024-06-27 21:00:52,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:52,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:52,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:00:52,218 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:52,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash 231374917, now seen corresponding path program 5 times [2024-06-27 21:00:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732458872] [2024-06-27 21:00:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:55,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:55,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732458872] [2024-06-27 21:00:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732458872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:55,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930932318] [2024-06-27 21:00:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:55,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:55,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:55,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 21:00:55,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 472 transitions, 9248 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 21:00:55,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:55,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 21:00:55,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand