./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.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/safe009_rmo.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/safe009_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:01:03,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:01:03,388 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:01:03,392 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:01:03,392 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:01:03,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:01:03,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:01:03,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:01:03,408 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:01:03,409 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:01:03,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:01:03,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:01:03,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:01:03,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:01:03,411 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:01:03,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:01:03,413 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:01:03,413 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:01:03,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:01:03,414 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:01:03,414 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:01:03,415 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:01:03,415 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:01:03,419 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:01:03,419 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:01:03,419 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:01:03,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:01:03,420 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:01:03,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:01:03,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:01:03,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:01:03,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:01:03,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:01:03,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:01:03,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:01:03,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:01:03,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:01:03,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:01:03,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:01:03,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:01:03,424 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:01:03,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:01:03,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:01:03,425 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:01:03,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:01:03,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:01:03,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:01:03,648 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:01:03,649 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:01:03,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.oepc.yml/witness.yml [2024-06-27 21:01:03,829 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:01:03,829 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:01:03,830 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.oepc.i [2024-06-27 21:01:05,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:01:05,247 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:01:05,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.oepc.i [2024-06-27 21:01:05,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a2dd8cf/e63120927fe7488b9e0a4a34ccec0196/FLAG45e3d3f2c [2024-06-27 21:01:05,274 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a2dd8cf/e63120927fe7488b9e0a4a34ccec0196 [2024-06-27 21:01:05,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:01:05,275 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:01:05,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:01:05,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:01:05,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:01:05,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:01:03" (1/2) ... [2024-06-27 21:01:05,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b798ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:01:05, skipping insertion in model container [2024-06-27 21:01:05,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:01:03" (1/2) ... [2024-06-27 21:01:05,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6375e766 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:01:05, skipping insertion in model container [2024-06-27 21:01:05,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:01:05" (2/2) ... [2024-06-27 21:01:05,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b798ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05, skipping insertion in model container [2024-06-27 21:01:05,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:01:05" (2/2) ... [2024-06-27 21:01:05,286 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:01:05,386 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:01:05,387 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((((((((((((((((((((! 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$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! 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_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! 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))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:01:05,387 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$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 || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$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$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$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$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:01:05,387 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((! 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$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! 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_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! 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))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:01:05,387 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:01:05,387 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-27 21:01:05,450 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:01:05,709 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:01:05,716 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:01:05,810 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:01:05,847 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:01:05,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05 WrapperNode [2024-06-27 21:01:05,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:01:05,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:01:05,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:01:05,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:01:05,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,916 INFO L138 Inliner]: procedures = 175, calls = 81, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2024-06-27 21:01:05,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:01:05,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:01:05,918 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:01:05,918 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:01:05,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,960 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-27 21:01:05,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,997 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:05,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:06,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:01:06,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:01:06,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:01:06,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:01:06,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (1/1) ... [2024-06-27 21:01:06,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:01:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:01:06,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:01:06,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:01:06,088 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:01:06,089 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:01:06,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:01:06,089 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:01:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:01:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:01:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:01:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:01:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:01:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:01:06,092 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:01:06,241 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:01:06,243 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:01:06,671 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:01:06,672 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:01:06,969 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:01:06,970 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:01:06,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:01:06 BoogieIcfgContainer [2024-06-27 21:01:06,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:01:06,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:01:06,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:01:06,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:01:06,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:01:03" (1/4) ... [2024-06-27 21:01:06,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e602786 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:01:06, skipping insertion in model container [2024-06-27 21:01:06,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:01:05" (2/4) ... [2024-06-27 21:01:06,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e602786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:01:06, skipping insertion in model container [2024-06-27 21:01:06,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:01:05" (3/4) ... [2024-06-27 21:01:06,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e602786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:01:06, skipping insertion in model container [2024-06-27 21:01:06,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:01:06" (4/4) ... [2024-06-27 21:01:06,977 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.oepc.i [2024-06-27 21:01:06,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:01:06,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:01:06,991 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:01:07,053 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:01:07,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:01:07,119 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:01:07,119 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:01:07,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:01:07,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:01:07,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:01:07,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:01:07,140 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;@79313f49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:01:07,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:01:07,144 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:01:07,145 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:01:07,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:01:07,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:07,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:01:07,146 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 21:01:07,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash 723089069, now seen corresponding path program 1 times [2024-06-27 21:01:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:07,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267845089] [2024-06-27 21:01:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:08,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:08,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267845089] [2024-06-27 21:01:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267845089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:08,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:08,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:01:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191364364] [2024-06-27 21:01:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:01:08,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:01:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:01:08,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:01:08,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:08,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:08,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:01:08,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:09,024 INFO L124 PetriNetUnfolderBase]: 990/1529 cut-off events. [2024-06-27 21:01:09,025 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 21:01:09,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 1529 events. 990/1529 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7037 event pairs, 650 based on Foata normal form. 1/1498 useless extension candidates. Maximal degree in co-relation 3097. Up to 1503 conditions per place. [2024-06-27 21:01:09,037 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 21:01:09,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 179 flow [2024-06-27 21:01:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:01:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:01:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-27 21:01:09,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-27 21:01:09,048 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 68 transitions. [2024-06-27 21:01:09,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 179 flow [2024-06-27 21:01:09,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:09,054 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:01:09,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:01:09,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:01:09,059 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:01:09,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:09,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:09,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:09,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:01:09,060 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 21:01:09,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -896057172, now seen corresponding path program 1 times [2024-06-27 21:01:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569357147] [2024-06-27 21:01:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:11,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569357147] [2024-06-27 21:01:11,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569357147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:11,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:11,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:01:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404063448] [2024-06-27 21:01:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:01:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:01:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:01:11,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:01:11,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:11,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:11,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:01:11,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:11,661 INFO L124 PetriNetUnfolderBase]: 984/1519 cut-off events. [2024-06-27 21:01:11,661 INFO L125 PetriNetUnfolderBase]: For 287/291 co-relation queries the response was YES. [2024-06-27 21:01:11,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3528 conditions, 1519 events. 984/1519 cut-off events. For 287/291 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6953 event pairs, 540 based on Foata normal form. 5/1521 useless extension candidates. Maximal degree in co-relation 3516. Up to 1475 conditions per place. [2024-06-27 21:01:11,668 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 21:01:11,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 254 flow [2024-06-27 21:01:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:01:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:01:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 21:01:11,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-27 21:01:11,670 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-06-27 21:01:11,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 254 flow [2024-06-27 21:01:11,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:01:11,672 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 21:01:11,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 21:01:11,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 21:01:11,673 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 21:01:11,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:11,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:11,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:11,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:01:11,674 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 21:01:11,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2007966949, now seen corresponding path program 1 times [2024-06-27 21:01:11,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:11,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280132987] [2024-06-27 21:01:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:11,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:13,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:13,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280132987] [2024-06-27 21:01:13,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280132987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:13,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:13,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:01:13,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242499791] [2024-06-27 21:01:13,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:13,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:01:13,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:01:13,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:01:13,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:01:13,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 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 21:01:13,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:13,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:01:13,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:14,341 INFO L124 PetriNetUnfolderBase]: 1183/1810 cut-off events. [2024-06-27 21:01:14,342 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2024-06-27 21:01:14,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4673 conditions, 1810 events. 1183/1810 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8211 event pairs, 510 based on Foata normal form. 3/1811 useless extension candidates. Maximal degree in co-relation 4659. Up to 1748 conditions per place. [2024-06-27 21:01:14,349 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-27 21:01:14,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 379 flow [2024-06-27 21:01:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:01:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:01:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 21:01:14,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-27 21:01:14,352 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 106 transitions. [2024-06-27 21:01:14,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 379 flow [2024-06-27 21:01:14,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 358 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:01:14,355 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 206 flow [2024-06-27 21:01:14,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-06-27 21:01:14,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 21:01:14,356 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 206 flow [2024-06-27 21:01:14,356 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 21:01:14,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:14,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:14,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:01:14,356 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 21:01:14,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2076528106, now seen corresponding path program 1 times [2024-06-27 21:01:14,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:14,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338824623] [2024-06-27 21:01:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:16,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:16,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338824623] [2024-06-27 21:01:16,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338824623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:16,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:16,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:01:16,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126049096] [2024-06-27 21:01:16,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:16,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:01:16,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:01:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:01:16,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:01:16,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 206 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 21:01:16,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:16,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:01:16,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:17,039 INFO L124 PetriNetUnfolderBase]: 1174/1795 cut-off events. [2024-06-27 21:01:17,040 INFO L125 PetriNetUnfolderBase]: For 1619/1619 co-relation queries the response was YES. [2024-06-27 21:01:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5131 conditions, 1795 events. 1174/1795 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8119 event pairs, 365 based on Foata normal form. 6/1799 useless extension candidates. Maximal degree in co-relation 5114. Up to 1695 conditions per place. [2024-06-27 21:01:17,049 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-27 21:01:17,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 442 flow [2024-06-27 21:01:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:01:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:01:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 21:01:17,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 21:01:17,054 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 206 flow. Second operand 6 states and 121 transitions. [2024-06-27 21:01:17,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 442 flow [2024-06-27 21:01:17,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 438 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 21:01:17,059 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 241 flow [2024-06-27 21:01:17,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 21:01:17,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 21:01:17,061 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 241 flow [2024-06-27 21:01:17,061 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 21:01:17,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:17,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:17,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:01:17,062 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 21:01:17,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 516907577, now seen corresponding path program 1 times [2024-06-27 21:01:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:17,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139912998] [2024-06-27 21:01:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:18,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139912998] [2024-06-27 21:01:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139912998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:18,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:18,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:01:18,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640690997] [2024-06-27 21:01:18,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:18,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:01:18,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:01:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:01:18,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:18,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 241 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 21:01:18,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:18,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:18,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:19,545 INFO L124 PetriNetUnfolderBase]: 1192/1822 cut-off events. [2024-06-27 21:01:19,546 INFO L125 PetriNetUnfolderBase]: For 2570/2572 co-relation queries the response was YES. [2024-06-27 21:01:19,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1822 events. 1192/1822 cut-off events. For 2570/2572 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8311 event pairs, 452 based on Foata normal form. 10/1830 useless extension candidates. Maximal degree in co-relation 5528. Up to 1694 conditions per place. [2024-06-27 21:01:19,556 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-06-27 21:01:19,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 475 flow [2024-06-27 21:01:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:01:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:01:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 21:01:19,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:01:19,560 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 241 flow. Second operand 5 states and 93 transitions. [2024-06-27 21:01:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 475 flow [2024-06-27 21:01:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 446 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:19,567 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 299 flow [2024-06-27 21:01:19,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-27 21:01:19,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-27 21:01:19,570 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 299 flow [2024-06-27 21:01:19,570 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 21:01:19,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:19,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:19,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:01:19,571 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 21:01:19,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash -979506050, now seen corresponding path program 1 times [2024-06-27 21:01:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:19,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239617196] [2024-06-27 21:01:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:19,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:21,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239617196] [2024-06-27 21:01:21,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239617196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:21,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:21,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:21,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015751627] [2024-06-27 21:01:21,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:21,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:21,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 299 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 21:01:21,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:21,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:21,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:23,005 INFO L124 PetriNetUnfolderBase]: 1205/1847 cut-off events. [2024-06-27 21:01:23,005 INFO L125 PetriNetUnfolderBase]: For 3808/3812 co-relation queries the response was YES. [2024-06-27 21:01:23,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6311 conditions, 1847 events. 1205/1847 cut-off events. For 3808/3812 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8438 event pairs, 455 based on Foata normal form. 6/1851 useless extension candidates. Maximal degree in co-relation 6287. Up to 1726 conditions per place. [2024-06-27 21:01:23,014 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-27 21:01:23,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 633 flow [2024-06-27 21:01:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:01:23,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 21:01:23,017 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 299 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:01:23,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 633 flow [2024-06-27 21:01:23,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 621 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 21:01:23,023 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 391 flow [2024-06-27 21:01:23,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 21:01:23,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 21:01:23,026 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 391 flow [2024-06-27 21:01:23,027 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 21:01:23,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:23,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:23,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:01:23,027 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 21:01:23,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -979385894, now seen corresponding path program 1 times [2024-06-27 21:01:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441850378] [2024-06-27 21:01:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:23,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441850378] [2024-06-27 21:01:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441850378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:25,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049604711] [2024-06-27 21:01:25,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:25,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:25,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:25,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 391 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 21:01:25,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:25,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:25,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:26,685 INFO L124 PetriNetUnfolderBase]: 1420/2150 cut-off events. [2024-06-27 21:01:26,685 INFO L125 PetriNetUnfolderBase]: For 5955/5959 co-relation queries the response was YES. [2024-06-27 21:01:26,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7808 conditions, 2150 events. 1420/2150 cut-off events. For 5955/5959 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9885 event pairs, 466 based on Foata normal form. 12/2160 useless extension candidates. Maximal degree in co-relation 7781. Up to 1906 conditions per place. [2024-06-27 21:01:26,698 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 90 selfloop transitions, 28 changer transitions 0/122 dead transitions. [2024-06-27 21:01:26,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 122 transitions, 875 flow [2024-06-27 21:01:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:01:26,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:01:26,700 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 391 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:01:26,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 122 transitions, 875 flow [2024-06-27 21:01:26,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 837 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:26,707 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 533 flow [2024-06-27 21:01:26,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-27 21:01:26,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-27 21:01:26,707 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 533 flow [2024-06-27 21:01:26,708 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 21:01:26,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:26,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:26,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:01:26,708 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 21:01:26,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:26,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1645365344, now seen corresponding path program 2 times [2024-06-27 21:01:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:26,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993574141] [2024-06-27 21:01:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:26,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:29,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:29,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993574141] [2024-06-27 21:01:29,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993574141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:29,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:29,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:29,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705482340] [2024-06-27 21:01:29,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:29,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:29,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:29,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 533 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 21:01:29,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:29,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:31,041 INFO L124 PetriNetUnfolderBase]: 1461/2220 cut-off events. [2024-06-27 21:01:31,042 INFO L125 PetriNetUnfolderBase]: For 8601/8628 co-relation queries the response was YES. [2024-06-27 21:01:31,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9089 conditions, 2220 events. 1461/2220 cut-off events. For 8601/8628 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10271 event pairs, 490 based on Foata normal form. 19/2236 useless extension candidates. Maximal degree in co-relation 9058. Up to 2099 conditions per place. [2024-06-27 21:01:31,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 84 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-27 21:01:31,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 927 flow [2024-06-27 21:01:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:01:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:01:31,058 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 533 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:01:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 927 flow [2024-06-27 21:01:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 861 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:31,069 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 673 flow [2024-06-27 21:01:31,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2024-06-27 21:01:31,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-27 21:01:31,069 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 673 flow [2024-06-27 21:01:31,070 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 21:01:31,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:31,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:31,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:01:31,070 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 21:01:31,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash 950575708, now seen corresponding path program 3 times [2024-06-27 21:01:31,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:31,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293340771] [2024-06-27 21:01:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:31,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:32,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:32,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293340771] [2024-06-27 21:01:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293340771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:32,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:32,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:32,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2499725] [2024-06-27 21:01:32,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:32,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:33,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:33,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 673 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 21:01:33,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:33,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:33,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:34,549 INFO L124 PetriNetUnfolderBase]: 1857/2812 cut-off events. [2024-06-27 21:01:34,549 INFO L125 PetriNetUnfolderBase]: For 11516/11520 co-relation queries the response was YES. [2024-06-27 21:01:34,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 2812 events. 1857/2812 cut-off events. For 11516/11520 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13472 event pairs, 514 based on Foata normal form. 22/2832 useless extension candidates. Maximal degree in co-relation 11699. Up to 2161 conditions per place. [2024-06-27 21:01:34,570 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 122 selfloop transitions, 68 changer transitions 0/194 dead transitions. [2024-06-27 21:01:34,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 194 transitions, 1660 flow [2024-06-27 21:01:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 21:01:34,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-27 21:01:34,574 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 673 flow. Second operand 11 states and 203 transitions. [2024-06-27 21:01:34,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 194 transitions, 1660 flow [2024-06-27 21:01:34,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 194 transitions, 1575 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:34,590 INFO L231 Difference]: Finished difference. Result has 92 places, 125 transitions, 1103 flow [2024-06-27 21:01:34,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1103, PETRI_PLACES=92, PETRI_TRANSITIONS=125} [2024-06-27 21:01:34,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 21:01:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 125 transitions, 1103 flow [2024-06-27 21:01:34,591 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 21:01:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:34,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:01:34,591 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 21:01:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -612926984, now seen corresponding path program 2 times [2024-06-27 21:01:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607716416] [2024-06-27 21:01:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:36,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607716416] [2024-06-27 21:01:36,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607716416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:36,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:36,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969331557] [2024-06-27 21:01:36,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:36,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:36,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:36,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 125 transitions, 1103 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 21:01:36,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:36,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:36,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:37,912 INFO L124 PetriNetUnfolderBase]: 1897/2856 cut-off events. [2024-06-27 21:01:37,912 INFO L125 PetriNetUnfolderBase]: For 16487/16493 co-relation queries the response was YES. [2024-06-27 21:01:37,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13524 conditions, 2856 events. 1897/2856 cut-off events. For 16487/16493 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13615 event pairs, 477 based on Foata normal form. 20/2874 useless extension candidates. Maximal degree in co-relation 13481. Up to 2317 conditions per place. [2024-06-27 21:01:37,929 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 67 changer transitions 0/160 dead transitions. [2024-06-27 21:01:37,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 160 transitions, 1591 flow [2024-06-27 21:01:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:01:37,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:01:37,931 INFO L175 Difference]: Start difference. First operand has 92 places, 125 transitions, 1103 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:01:37,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 160 transitions, 1591 flow [2024-06-27 21:01:37,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 160 transitions, 1514 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:37,950 INFO L231 Difference]: Finished difference. Result has 96 places, 133 transitions, 1301 flow [2024-06-27 21:01:37,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1301, PETRI_PLACES=96, PETRI_TRANSITIONS=133} [2024-06-27 21:01:37,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 21:01:37,951 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 133 transitions, 1301 flow [2024-06-27 21:01:37,952 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 21:01:37,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:37,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:37,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:01:37,952 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 21:01:37,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash -612927170, now seen corresponding path program 4 times [2024-06-27 21:01:37,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:37,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310373133] [2024-06-27 21:01:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:37,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310373133] [2024-06-27 21:01:40,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310373133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:40,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:40,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:40,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795213703] [2024-06-27 21:01:40,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:40,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:40,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:40,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 133 transitions, 1301 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 21:01:40,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:40,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:40,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:41,509 INFO L124 PetriNetUnfolderBase]: 1892/2857 cut-off events. [2024-06-27 21:01:41,509 INFO L125 PetriNetUnfolderBase]: For 19625/19631 co-relation queries the response was YES. [2024-06-27 21:01:41,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14272 conditions, 2857 events. 1892/2857 cut-off events. For 19625/19631 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13677 event pairs, 547 based on Foata normal form. 8/2863 useless extension candidates. Maximal degree in co-relation 14227. Up to 2628 conditions per place. [2024-06-27 21:01:41,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 44 changer transitions 0/158 dead transitions. [2024-06-27 21:01:41,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 158 transitions, 1685 flow [2024-06-27 21:01:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:01:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:01:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:01:41,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:01:41,529 INFO L175 Difference]: Start difference. First operand has 96 places, 133 transitions, 1301 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:01:41,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 158 transitions, 1685 flow [2024-06-27 21:01:41,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1564 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:41,557 INFO L231 Difference]: Finished difference. Result has 98 places, 133 transitions, 1293 flow [2024-06-27 21:01:41,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1293, PETRI_PLACES=98, PETRI_TRANSITIONS=133} [2024-06-27 21:01:41,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 21:01:41,558 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 133 transitions, 1293 flow [2024-06-27 21:01:41,558 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 21:01:41,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:41,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:01:41,559 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 21:01:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash -612689834, now seen corresponding path program 3 times [2024-06-27 21:01:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522114805] [2024-06-27 21:01:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:43,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:43,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522114805] [2024-06-27 21:01:43,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522114805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:43,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:43,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:01:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881043462] [2024-06-27 21:01:43,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:01:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:01:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:01:43,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:43,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 133 transitions, 1293 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 21:01:43,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:43,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:43,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:44,557 INFO L124 PetriNetUnfolderBase]: 1942/2934 cut-off events. [2024-06-27 21:01:44,557 INFO L125 PetriNetUnfolderBase]: For 20171/20211 co-relation queries the response was YES. [2024-06-27 21:01:44,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14033 conditions, 2934 events. 1942/2934 cut-off events. For 20171/20211 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14176 event pairs, 487 based on Foata normal form. 46/2976 useless extension candidates. Maximal degree in co-relation 13987. Up to 2138 conditions per place. [2024-06-27 21:01:44,607 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 71 changer transitions 0/171 dead transitions. [2024-06-27 21:01:44,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1845 flow [2024-06-27 21:01:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:01:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:01:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 21:01:44,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:01:44,610 INFO L175 Difference]: Start difference. First operand has 98 places, 133 transitions, 1293 flow. Second operand 6 states and 114 transitions. [2024-06-27 21:01:44,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1845 flow [2024-06-27 21:01:44,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1749 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:44,628 INFO L231 Difference]: Finished difference. Result has 100 places, 144 transitions, 1502 flow [2024-06-27 21:01:44,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1502, PETRI_PLACES=100, PETRI_TRANSITIONS=144} [2024-06-27 21:01:44,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 21:01:44,628 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 144 transitions, 1502 flow [2024-06-27 21:01:44,629 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 21:01:44,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:44,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:01:44,629 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 21:01:44,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash -612680906, now seen corresponding path program 1 times [2024-06-27 21:01:44,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:44,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051048219] [2024-06-27 21:01:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:46,987 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 21:01:46,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:46,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051048219] [2024-06-27 21:01:46,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051048219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:46,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:46,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287246970] [2024-06-27 21:01:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:46,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:47,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:47,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 144 transitions, 1502 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 21:01:47,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:47,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:47,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:48,048 INFO L124 PetriNetUnfolderBase]: 1994/3009 cut-off events. [2024-06-27 21:01:48,049 INFO L125 PetriNetUnfolderBase]: For 22551/22555 co-relation queries the response was YES. [2024-06-27 21:01:48,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 3009 events. 1994/3009 cut-off events. For 22551/22555 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14537 event pairs, 567 based on Foata normal form. 20/3027 useless extension candidates. Maximal degree in co-relation 15444. Up to 2750 conditions per place. [2024-06-27 21:01:48,065 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 156 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-27 21:01:48,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 176 transitions, 1994 flow [2024-06-27 21:01:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:01:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:01:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:01:48,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:01:48,067 INFO L175 Difference]: Start difference. First operand has 100 places, 144 transitions, 1502 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:01:48,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 176 transitions, 1994 flow [2024-06-27 21:01:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 176 transitions, 1948 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 21:01:48,097 INFO L231 Difference]: Finished difference. Result has 105 places, 146 transitions, 1528 flow [2024-06-27 21:01:48,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1528, PETRI_PLACES=105, PETRI_TRANSITIONS=146} [2024-06-27 21:01:48,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 21:01:48,097 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 146 transitions, 1528 flow [2024-06-27 21:01:48,098 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 21:01:48,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:48,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:01:48,098 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 21:01:48,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -299915345, now seen corresponding path program 1 times [2024-06-27 21:01:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:48,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624853738] [2024-06-27 21:01:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:50,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624853738] [2024-06-27 21:01:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624853738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:50,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:50,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:50,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374258368] [2024-06-27 21:01:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:50,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:50,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:50,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 146 transitions, 1528 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 21:01:50,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:50,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:50,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:51,565 INFO L124 PetriNetUnfolderBase]: 2196/3319 cut-off events. [2024-06-27 21:01:51,566 INFO L125 PetriNetUnfolderBase]: For 25561/25567 co-relation queries the response was YES. [2024-06-27 21:01:51,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16918 conditions, 3319 events. 2196/3319 cut-off events. For 25561/25567 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16481 event pairs, 577 based on Foata normal form. 14/3331 useless extension candidates. Maximal degree in co-relation 16867. Up to 2218 conditions per place. [2024-06-27 21:01:51,609 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 92 changer transitions 0/218 dead transitions. [2024-06-27 21:01:51,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 218 transitions, 2356 flow [2024-06-27 21:01:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 21:01:51,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 21:01:51,614 INFO L175 Difference]: Start difference. First operand has 105 places, 146 transitions, 1528 flow. Second operand 11 states and 201 transitions. [2024-06-27 21:01:51,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 218 transitions, 2356 flow [2024-06-27 21:01:51,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 218 transitions, 2310 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:51,644 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 1827 flow [2024-06-27 21:01:51,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1827, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2024-06-27 21:01:51,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 21:01:51,645 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 1827 flow [2024-06-27 21:01:51,645 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 21:01:51,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:51,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:01:51,645 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 21:01:51,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:51,646 INFO L85 PathProgramCache]: Analyzing trace with hash 533283021, now seen corresponding path program 2 times [2024-06-27 21:01:51,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16387615] [2024-06-27 21:01:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16387615] [2024-06-27 21:01:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16387615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117137223] [2024-06-27 21:01:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:54,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:54,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 1827 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 21:01:54,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:54,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:54,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:55,482 INFO L124 PetriNetUnfolderBase]: 2388/3619 cut-off events. [2024-06-27 21:01:55,482 INFO L125 PetriNetUnfolderBase]: For 35129/35133 co-relation queries the response was YES. [2024-06-27 21:01:55,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19905 conditions, 3619 events. 2388/3619 cut-off events. For 35129/35133 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18327 event pairs, 591 based on Foata normal form. 12/3629 useless extension candidates. Maximal degree in co-relation 19851. Up to 2669 conditions per place. [2024-06-27 21:01:55,509 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 135 selfloop transitions, 87 changer transitions 0/226 dead transitions. [2024-06-27 21:01:55,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 226 transitions, 2700 flow [2024-06-27 21:01:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:01:55,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:01:55,511 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 1827 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:01:55,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 226 transitions, 2700 flow [2024-06-27 21:01:55,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 226 transitions, 2513 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:55,556 INFO L231 Difference]: Finished difference. Result has 119 places, 170 transitions, 1999 flow [2024-06-27 21:01:55,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1999, PETRI_PLACES=119, PETRI_TRANSITIONS=170} [2024-06-27 21:01:55,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 21:01:55,557 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 170 transitions, 1999 flow [2024-06-27 21:01:55,557 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 21:01:55,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:55,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:55,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:01:55,558 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 21:01:55,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash -296190695, now seen corresponding path program 3 times [2024-06-27 21:01:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32299371] [2024-06-27 21:01:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:55,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:58,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32299371] [2024-06-27 21:01:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32299371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:58,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:58,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:58,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953014437] [2024-06-27 21:01:58,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:58,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:58,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:58,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:58,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 170 transitions, 1999 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 21:01:58,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:58,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:58,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:59,800 INFO L124 PetriNetUnfolderBase]: 2426/3693 cut-off events. [2024-06-27 21:01:59,801 INFO L125 PetriNetUnfolderBase]: For 39116/39120 co-relation queries the response was YES. [2024-06-27 21:01:59,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21105 conditions, 3693 events. 2426/3693 cut-off events. For 39116/39120 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18954 event pairs, 555 based on Foata normal form. 12/3703 useless extension candidates. Maximal degree in co-relation 21048. Up to 2703 conditions per place. [2024-06-27 21:01:59,828 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 141 selfloop transitions, 96 changer transitions 0/241 dead transitions. [2024-06-27 21:01:59,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2842 flow [2024-06-27 21:01:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:01:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:01:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-27 21:01:59,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-27 21:01:59,830 INFO L175 Difference]: Start difference. First operand has 119 places, 170 transitions, 1999 flow. Second operand 12 states and 215 transitions. [2024-06-27 21:01:59,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2842 flow [2024-06-27 21:01:59,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 241 transitions, 2718 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:59,894 INFO L231 Difference]: Finished difference. Result has 125 places, 177 transitions, 2175 flow [2024-06-27 21:01:59,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2175, PETRI_PLACES=125, PETRI_TRANSITIONS=177} [2024-06-27 21:01:59,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:01:59,895 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 177 transitions, 2175 flow [2024-06-27 21:01:59,895 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 21:01:59,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:59,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:59,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:01:59,896 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 21:01:59,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1813514723, now seen corresponding path program 4 times [2024-06-27 21:01:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:59,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929018222] [2024-06-27 21:01:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:59,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:01,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:01,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929018222] [2024-06-27 21:02:01,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929018222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:01,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:01,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699503080] [2024-06-27 21:02:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:01,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:01,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:02,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:02,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 177 transitions, 2175 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 21:02:02,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:02,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:02,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:03,654 INFO L124 PetriNetUnfolderBase]: 2556/3906 cut-off events. [2024-06-27 21:02:03,654 INFO L125 PetriNetUnfolderBase]: For 45642/45692 co-relation queries the response was YES. [2024-06-27 21:02:03,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22989 conditions, 3906 events. 2556/3906 cut-off events. For 45642/45692 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20351 event pairs, 484 based on Foata normal form. 46/3948 useless extension candidates. Maximal degree in co-relation 22930. Up to 2249 conditions per place. [2024-06-27 21:02:03,681 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 121 changer transitions 0/248 dead transitions. [2024-06-27 21:02:03,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 248 transitions, 3168 flow [2024-06-27 21:02:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:02:03,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 21:02:03,682 INFO L175 Difference]: Start difference. First operand has 125 places, 177 transitions, 2175 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:02:03,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 248 transitions, 3168 flow [2024-06-27 21:02:03,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 248 transitions, 2948 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 21:02:03,747 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 2460 flow [2024-06-27 21:02:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2460, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-06-27 21:02:03,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:02:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 2460 flow [2024-06-27 21:02:03,748 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 21:02:03,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:03,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:03,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:02:03,748 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 21:02:03,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1820866373, now seen corresponding path program 5 times [2024-06-27 21:02:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018233145] [2024-06-27 21:02:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:06,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018233145] [2024-06-27 21:02:06,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018233145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:06,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021882236] [2024-06-27 21:02:06,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:06,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:06,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:06,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 2460 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 21:02:06,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:06,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:06,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:07,834 INFO L124 PetriNetUnfolderBase]: 2806/4287 cut-off events. [2024-06-27 21:02:07,834 INFO L125 PetriNetUnfolderBase]: For 55084/55088 co-relation queries the response was YES. [2024-06-27 21:02:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26499 conditions, 4287 events. 2806/4287 cut-off events. For 55084/55088 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22773 event pairs, 616 based on Foata normal form. 12/4297 useless extension candidates. Maximal degree in co-relation 26438. Up to 3001 conditions per place. [2024-06-27 21:02:07,864 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-27 21:02:07,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 3717 flow [2024-06-27 21:02:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:02:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:02:07,866 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 2460 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:02:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 3717 flow [2024-06-27 21:02:07,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 271 transitions, 3533 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:07,962 INFO L231 Difference]: Finished difference. Result has 132 places, 224 transitions, 3114 flow [2024-06-27 21:02:07,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3114, PETRI_PLACES=132, PETRI_TRANSITIONS=224} [2024-06-27 21:02:07,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 21:02:07,963 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 224 transitions, 3114 flow [2024-06-27 21:02:07,963 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 21:02:07,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:07,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:07,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:02:07,964 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 21:02:07,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1820871953, now seen corresponding path program 6 times [2024-06-27 21:02:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:07,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232038438] [2024-06-27 21:02:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:10,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232038438] [2024-06-27 21:02:10,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232038438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:10,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:10,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:10,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990052207] [2024-06-27 21:02:10,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:10,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:10,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:10,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:10,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:10,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 224 transitions, 3114 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 21:02:10,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:10,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:10,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:11,835 INFO L124 PetriNetUnfolderBase]: 2792/4269 cut-off events. [2024-06-27 21:02:11,835 INFO L125 PetriNetUnfolderBase]: For 59216/59220 co-relation queries the response was YES. [2024-06-27 21:02:11,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27781 conditions, 4269 events. 2792/4269 cut-off events. For 59216/59220 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22691 event pairs, 674 based on Foata normal form. 12/4279 useless extension candidates. Maximal degree in co-relation 27716. Up to 2995 conditions per place. [2024-06-27 21:02:11,865 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 161 selfloop transitions, 109 changer transitions 0/274 dead transitions. [2024-06-27 21:02:11,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 274 transitions, 3904 flow [2024-06-27 21:02:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:02:11,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:02:11,867 INFO L175 Difference]: Start difference. First operand has 132 places, 224 transitions, 3114 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:02:11,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 274 transitions, 3904 flow [2024-06-27 21:02:11,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 274 transitions, 3733 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:11,995 INFO L231 Difference]: Finished difference. Result has 137 places, 226 transitions, 3274 flow [2024-06-27 21:02:11,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3274, PETRI_PLACES=137, PETRI_TRANSITIONS=226} [2024-06-27 21:02:11,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 21:02:11,996 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 226 transitions, 3274 flow [2024-06-27 21:02:11,996 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 21:02:11,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:11,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:11,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:02:11,997 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:11,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:11,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1005014767, now seen corresponding path program 1 times [2024-06-27 21:02:11,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:11,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404408933] [2024-06-27 21:02:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:11,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:13,105 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 21:02:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:13,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404408933] [2024-06-27 21:02:13,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404408933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:13,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:13,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:02:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252075708] [2024-06-27 21:02:13,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:02:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:02:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:02:13,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:02:13,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 226 transitions, 3274 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:13,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:13,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:02:13,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:14,203 INFO L124 PetriNetUnfolderBase]: 2642/4041 cut-off events. [2024-06-27 21:02:14,203 INFO L125 PetriNetUnfolderBase]: For 66007/66033 co-relation queries the response was YES. [2024-06-27 21:02:14,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27508 conditions, 4041 events. 2642/4041 cut-off events. For 66007/66033 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21370 event pairs, 735 based on Foata normal form. 26/4038 useless extension candidates. Maximal degree in co-relation 27441. Up to 3745 conditions per place. [2024-06-27 21:02:14,236 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 209 selfloop transitions, 15 changer transitions 0/239 dead transitions. [2024-06-27 21:02:14,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 239 transitions, 3756 flow [2024-06-27 21:02:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:02:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:02:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:02:14,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:02:14,238 INFO L175 Difference]: Start difference. First operand has 137 places, 226 transitions, 3274 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:02:14,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 239 transitions, 3756 flow [2024-06-27 21:02:14,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 239 transitions, 3633 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:14,366 INFO L231 Difference]: Finished difference. Result has 137 places, 226 transitions, 3190 flow [2024-06-27 21:02:14,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3190, PETRI_PLACES=137, PETRI_TRANSITIONS=226} [2024-06-27 21:02:14,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 21:02:14,366 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 226 transitions, 3190 flow [2024-06-27 21:02:14,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:14,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:14,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:14,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:02:14,367 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 21:02:14,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -710301859, now seen corresponding path program 1 times [2024-06-27 21:02:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:14,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605813746] [2024-06-27 21:02:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:16,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:16,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605813746] [2024-06-27 21:02:16,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605813746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:16,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:16,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:16,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756103664] [2024-06-27 21:02:16,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:16,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:16,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:16,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:16,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 226 transitions, 3190 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 21:02:16,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:16,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:16,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:18,028 INFO L124 PetriNetUnfolderBase]: 2748/4197 cut-off events. [2024-06-27 21:02:18,028 INFO L125 PetriNetUnfolderBase]: For 66489/66493 co-relation queries the response was YES. [2024-06-27 21:02:18,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27985 conditions, 4197 events. 2748/4197 cut-off events. For 66489/66493 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22239 event pairs, 596 based on Foata normal form. 8/4203 useless extension candidates. Maximal degree in co-relation 27917. Up to 3719 conditions per place. [2024-06-27 21:02:18,060 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 53 changer transitions 0/269 dead transitions. [2024-06-27 21:02:18,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 269 transitions, 3996 flow [2024-06-27 21:02:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:02:18,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:02:18,062 INFO L175 Difference]: Start difference. First operand has 137 places, 226 transitions, 3190 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:02:18,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 269 transitions, 3996 flow [2024-06-27 21:02:18,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 269 transitions, 3959 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:18,172 INFO L231 Difference]: Finished difference. Result has 141 places, 230 transitions, 3358 flow [2024-06-27 21:02:18,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=141, PETRI_TRANSITIONS=230} [2024-06-27 21:02:18,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 21:02:18,173 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 230 transitions, 3358 flow [2024-06-27 21:02:18,173 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 21:02:18,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:18,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:02:18,174 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 21:02:18,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash 102471679, now seen corresponding path program 2 times [2024-06-27 21:02:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981720387] [2024-06-27 21:02:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:20,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981720387] [2024-06-27 21:02:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981720387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:20,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:20,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809247742] [2024-06-27 21:02:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:20,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:20,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 230 transitions, 3358 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 21:02:20,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:20,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:20,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:22,415 INFO L124 PetriNetUnfolderBase]: 2768/4229 cut-off events. [2024-06-27 21:02:22,415 INFO L125 PetriNetUnfolderBase]: For 72168/72172 co-relation queries the response was YES. [2024-06-27 21:02:22,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28667 conditions, 4229 events. 2768/4229 cut-off events. For 72168/72172 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22453 event pairs, 706 based on Foata normal form. 8/4235 useless extension candidates. Maximal degree in co-relation 28599. Up to 3845 conditions per place. [2024-06-27 21:02:22,445 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 50 changer transitions 0/268 dead transitions. [2024-06-27 21:02:22,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 268 transitions, 4044 flow [2024-06-27 21:02:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:02:22,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:02:22,447 INFO L175 Difference]: Start difference. First operand has 141 places, 230 transitions, 3358 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:02:22,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 268 transitions, 4044 flow [2024-06-27 21:02:22,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 268 transitions, 3915 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:22,571 INFO L231 Difference]: Finished difference. Result has 145 places, 232 transitions, 3388 flow [2024-06-27 21:02:22,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3388, PETRI_PLACES=145, PETRI_TRANSITIONS=232} [2024-06-27 21:02:22,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 21:02:22,572 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 232 transitions, 3388 flow [2024-06-27 21:02:22,572 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 21:02:22,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:22,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:02:22,573 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:22,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash -648099329, now seen corresponding path program 3 times [2024-06-27 21:02:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672087657] [2024-06-27 21:02:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:25,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:25,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672087657] [2024-06-27 21:02:25,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672087657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:25,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:25,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568839346] [2024-06-27 21:02:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:25,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:25,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:25,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 232 transitions, 3388 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 21:02:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:26,851 INFO L124 PetriNetUnfolderBase]: 2788/4261 cut-off events. [2024-06-27 21:02:26,852 INFO L125 PetriNetUnfolderBase]: For 76185/76187 co-relation queries the response was YES. [2024-06-27 21:02:26,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28947 conditions, 4261 events. 2788/4261 cut-off events. For 76185/76187 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22673 event pairs, 711 based on Foata normal form. 6/4265 useless extension candidates. Maximal degree in co-relation 28877. Up to 3924 conditions per place. [2024-06-27 21:02:26,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 45 changer transitions 0/268 dead transitions. [2024-06-27 21:02:26,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 268 transitions, 4075 flow [2024-06-27 21:02:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:02:26,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 21:02:26,882 INFO L175 Difference]: Start difference. First operand has 145 places, 232 transitions, 3388 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:02:26,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 268 transitions, 4075 flow [2024-06-27 21:02:26,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 268 transitions, 3950 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:26,997 INFO L231 Difference]: Finished difference. Result has 148 places, 235 transitions, 3434 flow [2024-06-27 21:02:26,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3434, PETRI_PLACES=148, PETRI_TRANSITIONS=235} [2024-06-27 21:02:26,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 21:02:26,997 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 235 transitions, 3434 flow [2024-06-27 21:02:26,998 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 21:02:26,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:26,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:02:26,998 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 21:02:26,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash -647914631, now seen corresponding path program 1 times [2024-06-27 21:02:26,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:26,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769369910] [2024-06-27 21:02:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:26,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:30,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:30,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769369910] [2024-06-27 21:02:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769369910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:30,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:30,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:30,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375021007] [2024-06-27 21:02:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:30,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:30,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:30,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:30,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 235 transitions, 3434 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 21:02:30,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:30,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:30,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:31,885 INFO L124 PetriNetUnfolderBase]: 2868/4323 cut-off events. [2024-06-27 21:02:31,885 INFO L125 PetriNetUnfolderBase]: For 85101/85103 co-relation queries the response was YES. [2024-06-27 21:02:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29551 conditions, 4323 events. 2868/4323 cut-off events. For 85101/85103 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22524 event pairs, 577 based on Foata normal form. 18/4339 useless extension candidates. Maximal degree in co-relation 29479. Up to 3523 conditions per place. [2024-06-27 21:02:31,917 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 83 changer transitions 0/289 dead transitions. [2024-06-27 21:02:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 289 transitions, 4296 flow [2024-06-27 21:02:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:02:31,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 21:02:31,919 INFO L175 Difference]: Start difference. First operand has 148 places, 235 transitions, 3434 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:02:31,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 289 transitions, 4296 flow [2024-06-27 21:02:32,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 289 transitions, 4188 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:32,044 INFO L231 Difference]: Finished difference. Result has 153 places, 237 transitions, 3548 flow [2024-06-27 21:02:32,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3548, PETRI_PLACES=153, PETRI_TRANSITIONS=237} [2024-06-27 21:02:32,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 21:02:32,045 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 237 transitions, 3548 flow [2024-06-27 21:02:32,047 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 21:02:32,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:32,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:32,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:02:32,047 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 21:02:32,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:32,047 INFO L85 PathProgramCache]: Analyzing trace with hash -612459491, now seen corresponding path program 4 times [2024-06-27 21:02:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:32,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345143835] [2024-06-27 21:02:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:34,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345143835] [2024-06-27 21:02:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345143835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:34,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:34,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729245245] [2024-06-27 21:02:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:34,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:34,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:34,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 237 transitions, 3548 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 21:02:34,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:34,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:34,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:36,013 INFO L124 PetriNetUnfolderBase]: 2860/4377 cut-off events. [2024-06-27 21:02:36,013 INFO L125 PetriNetUnfolderBase]: For 87541/87547 co-relation queries the response was YES. [2024-06-27 21:02:36,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 4377 events. 2860/4377 cut-off events. For 87541/87547 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23400 event pairs, 610 based on Foata normal form. 10/4385 useless extension candidates. Maximal degree in co-relation 30165. Up to 3934 conditions per place. [2024-06-27 21:02:36,051 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 52 changer transitions 0/268 dead transitions. [2024-06-27 21:02:36,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 268 transitions, 4170 flow [2024-06-27 21:02:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:02:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:02:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:02:36,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:02:36,053 INFO L175 Difference]: Start difference. First operand has 153 places, 237 transitions, 3548 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:02:36,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 268 transitions, 4170 flow [2024-06-27 21:02:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 268 transitions, 3960 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 21:02:36,215 INFO L231 Difference]: Finished difference. Result has 152 places, 237 transitions, 3457 flow [2024-06-27 21:02:36,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3457, PETRI_PLACES=152, PETRI_TRANSITIONS=237} [2024-06-27 21:02:36,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 21:02:36,216 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 237 transitions, 3457 flow [2024-06-27 21:02:36,216 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 21:02:36,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:36,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:36,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:02:36,217 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 21:02:36,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash -612274793, now seen corresponding path program 2 times [2024-06-27 21:02:36,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:36,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564638443] [2024-06-27 21:02:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:39,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564638443] [2024-06-27 21:02:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564638443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:39,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:39,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776727389] [2024-06-27 21:02:39,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:39,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:39,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:39,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 237 transitions, 3457 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 21:02:39,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:39,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:39,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:40,468 INFO L124 PetriNetUnfolderBase]: 2940/4439 cut-off events. [2024-06-27 21:02:40,469 INFO L125 PetriNetUnfolderBase]: For 95221/95227 co-relation queries the response was YES. [2024-06-27 21:02:40,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30411 conditions, 4439 events. 2940/4439 cut-off events. For 95221/95227 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23235 event pairs, 561 based on Foata normal form. 22/4459 useless extension candidates. Maximal degree in co-relation 30337. Up to 3529 conditions per place. [2024-06-27 21:02:40,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 82 changer transitions 0/277 dead transitions. [2024-06-27 21:02:40,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 277 transitions, 4215 flow [2024-06-27 21:02:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:02:40,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:02:40,502 INFO L175 Difference]: Start difference. First operand has 152 places, 237 transitions, 3457 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:02:40,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 277 transitions, 4215 flow [2024-06-27 21:02:40,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 277 transitions, 4098 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:40,640 INFO L231 Difference]: Finished difference. Result has 154 places, 239 transitions, 3572 flow [2024-06-27 21:02:40,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3572, PETRI_PLACES=154, PETRI_TRANSITIONS=239} [2024-06-27 21:02:40,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 21:02:40,641 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 239 transitions, 3572 flow [2024-06-27 21:02:40,641 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 21:02:40,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:40,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:40,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:02:40,642 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 21:02:40,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash -376099433, now seen corresponding path program 3 times [2024-06-27 21:02:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540052140] [2024-06-27 21:02:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:40,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:43,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540052140] [2024-06-27 21:02:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540052140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:43,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768168073] [2024-06-27 21:02:43,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:43,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:43,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:43,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 239 transitions, 3572 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 21:02:43,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:43,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:43,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:44,744 INFO L124 PetriNetUnfolderBase]: 3004/4618 cut-off events. [2024-06-27 21:02:44,745 INFO L125 PetriNetUnfolderBase]: For 99496/99543 co-relation queries the response was YES. [2024-06-27 21:02:44,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31603 conditions, 4618 events. 3004/4618 cut-off events. For 99496/99543 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25003 event pairs, 494 based on Foata normal form. 51/4665 useless extension candidates. Maximal degree in co-relation 31528. Up to 3609 conditions per place. [2024-06-27 21:02:44,789 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 84 changer transitions 0/279 dead transitions. [2024-06-27 21:02:44,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 279 transitions, 4394 flow [2024-06-27 21:02:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:02:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:02:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 21:02:44,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-27 21:02:44,791 INFO L175 Difference]: Start difference. First operand has 154 places, 239 transitions, 3572 flow. Second operand 7 states and 134 transitions. [2024-06-27 21:02:44,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 279 transitions, 4394 flow [2024-06-27 21:02:45,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 279 transitions, 4204 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:45,031 INFO L231 Difference]: Finished difference. Result has 155 places, 241 transitions, 3610 flow [2024-06-27 21:02:45,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3610, PETRI_PLACES=155, PETRI_TRANSITIONS=241} [2024-06-27 21:02:45,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 21:02:45,032 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 241 transitions, 3610 flow [2024-06-27 21:02:45,032 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 21:02:45,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:45,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:02:45,032 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 21:02:45,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -375802763, now seen corresponding path program 4 times [2024-06-27 21:02:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:45,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912006930] [2024-06-27 21:02:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:48,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:48,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912006930] [2024-06-27 21:02:48,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912006930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:48,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:48,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:48,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032731305] [2024-06-27 21:02:48,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:48,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:48,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:48,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:48,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 241 transitions, 3610 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 21:02:48,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:48,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:48,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:49,466 INFO L124 PetriNetUnfolderBase]: 3112/4782 cut-off events. [2024-06-27 21:02:49,467 INFO L125 PetriNetUnfolderBase]: For 102018/102065 co-relation queries the response was YES. [2024-06-27 21:02:49,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32488 conditions, 4782 events. 3112/4782 cut-off events. For 102018/102065 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26004 event pairs, 478 based on Foata normal form. 51/4829 useless extension candidates. Maximal degree in co-relation 32412. Up to 3261 conditions per place. [2024-06-27 21:02:49,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 92 changer transitions 0/287 dead transitions. [2024-06-27 21:02:49,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 287 transitions, 4536 flow [2024-06-27 21:02:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:02:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:02:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:02:49,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 21:02:49,523 INFO L175 Difference]: Start difference. First operand has 155 places, 241 transitions, 3610 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:02:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 287 transitions, 4536 flow [2024-06-27 21:02:49,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 287 transitions, 4340 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:49,742 INFO L231 Difference]: Finished difference. Result has 157 places, 244 transitions, 3663 flow [2024-06-27 21:02:49,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3663, PETRI_PLACES=157, PETRI_TRANSITIONS=244} [2024-06-27 21:02:49,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 21:02:49,749 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 244 transitions, 3663 flow [2024-06-27 21:02:49,749 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 21:02:49,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:49,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:49,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:02:49,749 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 21:02:49,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash 124123922, now seen corresponding path program 1 times [2024-06-27 21:02:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:49,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086043422] [2024-06-27 21:02:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:52,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:52,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086043422] [2024-06-27 21:02:52,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086043422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:52,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:52,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:52,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122197385] [2024-06-27 21:02:52,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:52,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:52,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:52,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:52,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 244 transitions, 3663 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 21:02:52,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:52,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:52,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:54,319 INFO L124 PetriNetUnfolderBase]: 4039/6310 cut-off events. [2024-06-27 21:02:54,319 INFO L125 PetriNetUnfolderBase]: For 163235/163241 co-relation queries the response was YES. [2024-06-27 21:02:54,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42048 conditions, 6310 events. 4039/6310 cut-off events. For 163235/163241 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36998 event pairs, 957 based on Foata normal form. 62/6370 useless extension candidates. Maximal degree in co-relation 41971. Up to 2485 conditions per place. [2024-06-27 21:02:54,369 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 186 selfloop transitions, 142 changer transitions 0/332 dead transitions. [2024-06-27 21:02:54,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 332 transitions, 4997 flow [2024-06-27 21:02:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:02:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:02:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 21:02:54,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002217294900224 [2024-06-27 21:02:54,371 INFO L175 Difference]: Start difference. First operand has 157 places, 244 transitions, 3663 flow. Second operand 11 states and 221 transitions. [2024-06-27 21:02:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 332 transitions, 4997 flow [2024-06-27 21:02:54,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 332 transitions, 4863 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:54,597 INFO L231 Difference]: Finished difference. Result has 167 places, 247 transitions, 3954 flow [2024-06-27 21:02:54,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3954, PETRI_PLACES=167, PETRI_TRANSITIONS=247} [2024-06-27 21:02:54,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-27 21:02:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 247 transitions, 3954 flow [2024-06-27 21:02:54,598 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 21:02:54,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:54,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:54,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:02:54,598 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 21:02:54,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2018007630, now seen corresponding path program 2 times [2024-06-27 21:02:54,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:54,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660309718] [2024-06-27 21:02:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660309718] [2024-06-27 21:02:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660309718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386550419] [2024-06-27 21:02:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:57,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:57,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 247 transitions, 3954 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 21:02:57,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:57,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:57,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:59,939 INFO L124 PetriNetUnfolderBase]: 4688/7369 cut-off events. [2024-06-27 21:02:59,939 INFO L125 PetriNetUnfolderBase]: For 211266/211272 co-relation queries the response was YES. [2024-06-27 21:02:59,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7369 events. 4688/7369 cut-off events. For 211266/211272 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45258 event pairs, 1454 based on Foata normal form. 62/7429 useless extension candidates. Maximal degree in co-relation 49911. Up to 4597 conditions per place. [2024-06-27 21:02:59,994 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 186 selfloop transitions, 142 changer transitions 0/332 dead transitions. [2024-06-27 21:02:59,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 332 transitions, 5248 flow [2024-06-27 21:02:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:02:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:02:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-27 21:03:00,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:03:00,012 INFO L175 Difference]: Start difference. First operand has 167 places, 247 transitions, 3954 flow. Second operand 12 states and 232 transitions. [2024-06-27 21:03:00,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 332 transitions, 5248 flow [2024-06-27 21:03:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 332 transitions, 4987 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:00,400 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 4056 flow [2024-06-27 21:03:00,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4056, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-27 21:03:00,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-27 21:03:00,401 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 4056 flow [2024-06-27 21:03:00,401 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 21:03:00,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:00,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:00,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:03:00,402 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 21:03:00,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1118196244, now seen corresponding path program 3 times [2024-06-27 21:03:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031503689] [2024-06-27 21:03:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:00,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031503689] [2024-06-27 21:03:03,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031503689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:03,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:03,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:03,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246667179] [2024-06-27 21:03:03,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:03,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:03,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:03,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 4056 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 21:03:03,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:03,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:05,694 INFO L124 PetriNetUnfolderBase]: 4840/7633 cut-off events. [2024-06-27 21:03:05,695 INFO L125 PetriNetUnfolderBase]: For 221234/221240 co-relation queries the response was YES. [2024-06-27 21:03:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51084 conditions, 7633 events. 4840/7633 cut-off events. For 221234/221240 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47396 event pairs, 1675 based on Foata normal form. 70/7701 useless extension candidates. Maximal degree in co-relation 51001. Up to 5543 conditions per place. [2024-06-27 21:03:05,758 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 174 selfloop transitions, 142 changer transitions 0/320 dead transitions. [2024-06-27 21:03:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 320 transitions, 5116 flow [2024-06-27 21:03:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:03:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:03:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-27 21:03:05,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491869918699187 [2024-06-27 21:03:05,760 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 4056 flow. Second operand 12 states and 221 transitions. [2024-06-27 21:03:05,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 320 transitions, 5116 flow [2024-06-27 21:03:06,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 320 transitions, 4805 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 21:03:06,111 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 4079 flow [2024-06-27 21:03:06,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4079, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-27 21:03:06,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-27 21:03:06,112 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 4079 flow [2024-06-27 21:03:06,112 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 21:03:06,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:06,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:06,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:03:06,112 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 21:03:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1176747412, now seen corresponding path program 4 times [2024-06-27 21:03:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074907000] [2024-06-27 21:03:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:09,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:09,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074907000] [2024-06-27 21:03:09,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074907000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:09,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:09,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:09,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602695499] [2024-06-27 21:03:09,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:09,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:09,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:09,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:09,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:09,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 4079 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 21:03:09,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:09,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:09,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:11,528 INFO L124 PetriNetUnfolderBase]: 5116/8086 cut-off events. [2024-06-27 21:03:11,528 INFO L125 PetriNetUnfolderBase]: For 237116/237118 co-relation queries the response was YES. [2024-06-27 21:03:11,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53237 conditions, 8086 events. 5116/8086 cut-off events. For 237116/237118 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50985 event pairs, 1826 based on Foata normal form. 66/8150 useless extension candidates. Maximal degree in co-relation 53153. Up to 6283 conditions per place. [2024-06-27 21:03:11,590 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 120 changer transitions 1/317 dead transitions. [2024-06-27 21:03:11,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 317 transitions, 5133 flow [2024-06-27 21:03:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:03:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:03:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 21:03:11,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 21:03:11,605 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 4079 flow. Second operand 11 states and 205 transitions. [2024-06-27 21:03:11,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 317 transitions, 5133 flow [2024-06-27 21:03:11,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 317 transitions, 4821 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:03:11,934 INFO L231 Difference]: Finished difference. Result has 177 places, 250 transitions, 4049 flow [2024-06-27 21:03:11,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4049, PETRI_PLACES=177, PETRI_TRANSITIONS=250} [2024-06-27 21:03:11,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 21:03:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 250 transitions, 4049 flow [2024-06-27 21:03:11,935 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 21:03:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:11,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:03:11,936 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:11,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1176895282, now seen corresponding path program 5 times [2024-06-27 21:03:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928700289] [2024-06-27 21:03:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:14,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928700289] [2024-06-27 21:03:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928700289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:14,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:14,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511371631] [2024-06-27 21:03:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:14,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:15,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:15,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 250 transitions, 4049 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 21:03:15,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:15,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:17,585 INFO L124 PetriNetUnfolderBase]: 5761/9141 cut-off events. [2024-06-27 21:03:17,585 INFO L125 PetriNetUnfolderBase]: For 281853/281855 co-relation queries the response was YES. [2024-06-27 21:03:17,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59903 conditions, 9141 events. 5761/9141 cut-off events. For 281853/281855 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 59352 event pairs, 2063 based on Foata normal form. 58/9197 useless extension candidates. Maximal degree in co-relation 59818. Up to 6018 conditions per place. [2024-06-27 21:03:17,674 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 117 changer transitions 0/327 dead transitions. [2024-06-27 21:03:17,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 327 transitions, 5355 flow [2024-06-27 21:03:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:03:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:03:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 21:03:17,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-27 21:03:17,677 INFO L175 Difference]: Start difference. First operand has 177 places, 250 transitions, 4049 flow. Second operand 11 states and 211 transitions. [2024-06-27 21:03:17,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 327 transitions, 5355 flow [2024-06-27 21:03:18,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 327 transitions, 5093 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 21:03:18,215 INFO L231 Difference]: Finished difference. Result has 180 places, 252 transitions, 4137 flow [2024-06-27 21:03:18,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3787, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4137, PETRI_PLACES=180, PETRI_TRANSITIONS=252} [2024-06-27 21:03:18,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-27 21:03:18,216 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 252 transitions, 4137 flow [2024-06-27 21:03:18,216 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 21:03:18,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:18,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:18,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:03:18,217 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:18,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:18,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1171385032, now seen corresponding path program 6 times [2024-06-27 21:03:18,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:18,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237683244] [2024-06-27 21:03:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:21,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:21,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237683244] [2024-06-27 21:03:21,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237683244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:21,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:21,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063102041] [2024-06-27 21:03:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:21,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:21,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 252 transitions, 4137 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 21:03:21,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:21,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:21,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:24,132 INFO L124 PetriNetUnfolderBase]: 5913/9405 cut-off events. [2024-06-27 21:03:24,132 INFO L125 PetriNetUnfolderBase]: For 296232/296234 co-relation queries the response was YES. [2024-06-27 21:03:24,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60535 conditions, 9405 events. 5913/9405 cut-off events. For 296232/296234 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 61828 event pairs, 2277 based on Foata normal form. 66/9469 useless extension candidates. Maximal degree in co-relation 60448. Up to 7602 conditions per place. [2024-06-27 21:03:24,209 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 123 changer transitions 1/329 dead transitions. [2024-06-27 21:03:24,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 329 transitions, 5257 flow [2024-06-27 21:03:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:03:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:03:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-27 21:03:24,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427767354596623 [2024-06-27 21:03:24,211 INFO L175 Difference]: Start difference. First operand has 180 places, 252 transitions, 4137 flow. Second operand 13 states and 236 transitions. [2024-06-27 21:03:24,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 329 transitions, 5257 flow [2024-06-27 21:03:24,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 329 transitions, 5017 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:24,637 INFO L231 Difference]: Finished difference. Result has 185 places, 252 transitions, 4187 flow [2024-06-27 21:03:24,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3897, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4187, PETRI_PLACES=185, PETRI_TRANSITIONS=252} [2024-06-27 21:03:24,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-27 21:03:24,638 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 252 transitions, 4187 flow [2024-06-27 21:03:24,638 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 21:03:24,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:24,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:24,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:03:24,639 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:24,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1171169830, now seen corresponding path program 1 times [2024-06-27 21:03:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:24,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201498844] [2024-06-27 21:03:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:28,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201498844] [2024-06-27 21:03:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201498844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:28,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:28,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935307] [2024-06-27 21:03:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:28,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:28,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:28,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:28,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 252 transitions, 4187 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:28,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:28,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:28,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:30,764 INFO L124 PetriNetUnfolderBase]: 6101/9773 cut-off events. [2024-06-27 21:03:30,765 INFO L125 PetriNetUnfolderBase]: For 305848/305850 co-relation queries the response was YES. [2024-06-27 21:03:30,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62415 conditions, 9773 events. 6101/9773 cut-off events. For 305848/305850 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 65351 event pairs, 2196 based on Foata normal form. 50/9821 useless extension candidates. Maximal degree in co-relation 62327. Up to 6850 conditions per place. [2024-06-27 21:03:30,847 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 204 selfloop transitions, 126 changer transitions 1/335 dead transitions. [2024-06-27 21:03:30,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 335 transitions, 5369 flow [2024-06-27 21:03:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:03:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:03:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 240 transitions. [2024-06-27 21:03:30,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450281425891182 [2024-06-27 21:03:30,849 INFO L175 Difference]: Start difference. First operand has 185 places, 252 transitions, 4187 flow. Second operand 13 states and 240 transitions. [2024-06-27 21:03:30,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 335 transitions, 5369 flow [2024-06-27 21:03:31,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 335 transitions, 5097 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-27 21:03:31,353 INFO L231 Difference]: Finished difference. Result has 187 places, 252 transitions, 4200 flow [2024-06-27 21:03:31,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4200, PETRI_PLACES=187, PETRI_TRANSITIONS=252} [2024-06-27 21:03:31,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 21:03:31,354 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 252 transitions, 4200 flow [2024-06-27 21:03:31,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:31,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:31,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:31,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:03:31,354 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 21:03:31,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1058520622, now seen corresponding path program 1 times [2024-06-27 21:03:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:31,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645388150] [2024-06-27 21:03:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:33,407 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 21:03:33,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645388150] [2024-06-27 21:03:33,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645388150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:33,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:33,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:33,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612723865] [2024-06-27 21:03:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:33,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:33,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:03:33,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 252 transitions, 4200 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:33,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:33,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:03:33,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:35,401 INFO L124 PetriNetUnfolderBase]: 5682/9075 cut-off events. [2024-06-27 21:03:35,401 INFO L125 PetriNetUnfolderBase]: For 287271/287290 co-relation queries the response was YES. [2024-06-27 21:03:35,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57441 conditions, 9075 events. 5682/9075 cut-off events. For 287271/287290 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 59908 event pairs, 2423 based on Foata normal form. 41/9087 useless extension candidates. Maximal degree in co-relation 57352. Up to 8445 conditions per place. [2024-06-27 21:03:35,480 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 67 changer transitions 20/278 dead transitions. [2024-06-27 21:03:35,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 278 transitions, 4798 flow [2024-06-27 21:03:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:03:35,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 21:03:35,482 INFO L175 Difference]: Start difference. First operand has 187 places, 252 transitions, 4200 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:03:35,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 278 transitions, 4798 flow [2024-06-27 21:03:36,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 278 transitions, 4478 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-27 21:03:36,033 INFO L231 Difference]: Finished difference. Result has 183 places, 232 transitions, 3635 flow [2024-06-27 21:03:36,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3635, PETRI_PLACES=183, PETRI_TRANSITIONS=232} [2024-06-27 21:03:36,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 21:03:36,034 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 232 transitions, 3635 flow [2024-06-27 21:03:36,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:36,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:36,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:36,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:03:36,035 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:36,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1800863654, now seen corresponding path program 7 times [2024-06-27 21:03:36,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:36,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926566009] [2024-06-27 21:03:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:36,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:38,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926566009] [2024-06-27 21:03:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926566009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:38,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:38,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810101974] [2024-06-27 21:03:38,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:38,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:38,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:38,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:38,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:38,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 232 transitions, 3635 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 21:03:38,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:38,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:38,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:41,372 INFO L124 PetriNetUnfolderBase]: 5523/8844 cut-off events. [2024-06-27 21:03:41,372 INFO L125 PetriNetUnfolderBase]: For 313112/313118 co-relation queries the response was YES. [2024-06-27 21:03:41,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55467 conditions, 8844 events. 5523/8844 cut-off events. For 313112/313118 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 58156 event pairs, 2240 based on Foata normal form. 70/8912 useless extension candidates. Maximal degree in co-relation 55377. Up to 7238 conditions per place. [2024-06-27 21:03:41,457 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 175 selfloop transitions, 105 changer transitions 5/289 dead transitions. [2024-06-27 21:03:41,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 289 transitions, 4507 flow [2024-06-27 21:03:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:03:41,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:03:41,459 INFO L175 Difference]: Start difference. First operand has 183 places, 232 transitions, 3635 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:03:41,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 289 transitions, 4507 flow [2024-06-27 21:03:41,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 289 transitions, 4333 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:41,945 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 3719 flow [2024-06-27 21:03:41,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3719, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2024-06-27 21:03:41,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 21:03:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 3719 flow [2024-06-27 21:03:41,947 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 21:03:41,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:41,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:03:41,947 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:41,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1806226034, now seen corresponding path program 8 times [2024-06-27 21:03:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696789432] [2024-06-27 21:03:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696789432] [2024-06-27 21:03:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696789432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:44,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:44,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:44,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351724730] [2024-06-27 21:03:44,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:44,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:44,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 3719 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 21:03:44,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:44,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:44,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:47,428 INFO L124 PetriNetUnfolderBase]: 5939/9548 cut-off events. [2024-06-27 21:03:47,428 INFO L125 PetriNetUnfolderBase]: For 336076/336082 co-relation queries the response was YES. [2024-06-27 21:03:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58835 conditions, 9548 events. 5939/9548 cut-off events. For 336076/336082 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 64075 event pairs, 2433 based on Foata normal form. 70/9616 useless extension candidates. Maximal degree in co-relation 58744. Up to 7498 conditions per place. [2024-06-27 21:03:47,518 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 184 selfloop transitions, 105 changer transitions 0/293 dead transitions. [2024-06-27 21:03:47,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 293 transitions, 4617 flow [2024-06-27 21:03:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:03:47,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:03:47,519 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 3719 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:03:47,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 293 transitions, 4617 flow [2024-06-27 21:03:48,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 293 transitions, 4365 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:48,016 INFO L231 Difference]: Finished difference. Result has 188 places, 233 transitions, 3747 flow [2024-06-27 21:03:48,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3747, PETRI_PLACES=188, PETRI_TRANSITIONS=233} [2024-06-27 21:03:48,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 21:03:48,016 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 233 transitions, 3747 flow [2024-06-27 21:03:48,016 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 21:03:48,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:48,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:48,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:03:48,017 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:48,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash 969104700, now seen corresponding path program 9 times [2024-06-27 21:03:48,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:48,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466809787] [2024-06-27 21:03:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:48,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466809787] [2024-06-27 21:03:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466809787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:50,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:50,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895586701] [2024-06-27 21:03:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:50,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:50,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 233 transitions, 3747 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 21:03:50,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:50,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:50,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:53,606 INFO L124 PetriNetUnfolderBase]: 6111/9849 cut-off events. [2024-06-27 21:03:53,606 INFO L125 PetriNetUnfolderBase]: For 337840/337887 co-relation queries the response was YES. [2024-06-27 21:03:53,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59463 conditions, 9849 events. 6111/9849 cut-off events. For 337840/337887 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 66879 event pairs, 2215 based on Foata normal form. 99/9944 useless extension candidates. Maximal degree in co-relation 59371. Up to 7981 conditions per place. [2024-06-27 21:03:53,706 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 130 changer transitions 5/301 dead transitions. [2024-06-27 21:03:53,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 301 transitions, 4889 flow [2024-06-27 21:03:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:03:53,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-27 21:03:53,708 INFO L175 Difference]: Start difference. First operand has 188 places, 233 transitions, 3747 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:03:53,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 301 transitions, 4889 flow [2024-06-27 21:03:54,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 301 transitions, 4649 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:54,223 INFO L231 Difference]: Finished difference. Result has 190 places, 233 transitions, 3823 flow [2024-06-27 21:03:54,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3823, PETRI_PLACES=190, PETRI_TRANSITIONS=233} [2024-06-27 21:03:54,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-27 21:03:54,224 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 233 transitions, 3823 flow [2024-06-27 21:03:54,224 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 21:03:54,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:54,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:54,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:03:54,225 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:54,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1806373904, now seen corresponding path program 10 times [2024-06-27 21:03:54,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:54,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298888404] [2024-06-27 21:03:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:54,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:57,186 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 21:03:57,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:57,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298888404] [2024-06-27 21:03:57,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298888404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:57,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:57,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:57,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968029820] [2024-06-27 21:03:57,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:57,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:57,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 233 transitions, 3823 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 21:03:57,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:57,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:59,897 INFO L124 PetriNetUnfolderBase]: 6454/10437 cut-off events. [2024-06-27 21:03:59,897 INFO L125 PetriNetUnfolderBase]: For 341573/341579 co-relation queries the response was YES. [2024-06-27 21:03:59,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61658 conditions, 10437 events. 6454/10437 cut-off events. For 341573/341579 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 71784 event pairs, 2260 based on Foata normal form. 62/10497 useless extension candidates. Maximal degree in co-relation 61565. Up to 5775 conditions per place. [2024-06-27 21:03:59,985 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 107 changer transitions 0/303 dead transitions. [2024-06-27 21:03:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 303 transitions, 4897 flow [2024-06-27 21:03:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 21:03:59,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-27 21:03:59,987 INFO L175 Difference]: Start difference. First operand has 190 places, 233 transitions, 3823 flow. Second operand 10 states and 196 transitions. [2024-06-27 21:03:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 303 transitions, 4897 flow [2024-06-27 21:04:00,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 303 transitions, 4596 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:00,489 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 3880 flow [2024-06-27 21:04:00,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3880, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-27 21:04:00,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 21:04:00,490 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 3880 flow [2024-06-27 21:04:00,490 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 21:04:00,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:00,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:04:00,490 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:00,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1225820412, now seen corresponding path program 2 times [2024-06-27 21:04:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130563416] [2024-06-27 21:04:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:03,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:03,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130563416] [2024-06-27 21:04:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130563416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:03,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:03,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96831116] [2024-06-27 21:04:03,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:03,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:03,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:03,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 3880 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:03,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:03,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:06,537 INFO L124 PetriNetUnfolderBase]: 6610/10738 cut-off events. [2024-06-27 21:04:06,537 INFO L125 PetriNetUnfolderBase]: For 359367/359414 co-relation queries the response was YES. [2024-06-27 21:04:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62902 conditions, 10738 events. 6610/10738 cut-off events. For 359367/359414 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 74852 event pairs, 2448 based on Foata normal form. 83/10817 useless extension candidates. Maximal degree in co-relation 62807. Up to 8500 conditions per place. [2024-06-27 21:04:06,621 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 132 changer transitions 11/317 dead transitions. [2024-06-27 21:04:06,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 317 transitions, 5136 flow [2024-06-27 21:04:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 21:04:06,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48337028824833705 [2024-06-27 21:04:06,622 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 3880 flow. Second operand 11 states and 218 transitions. [2024-06-27 21:04:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 317 transitions, 5136 flow [2024-06-27 21:04:07,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 317 transitions, 4862 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:07,311 INFO L231 Difference]: Finished difference. Result has 196 places, 236 transitions, 3925 flow [2024-06-27 21:04:07,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3925, PETRI_PLACES=196, PETRI_TRANSITIONS=236} [2024-06-27 21:04:07,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-27 21:04:07,312 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 236 transitions, 3925 flow [2024-06-27 21:04:07,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:07,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:07,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:07,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:04:07,313 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:07,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1279616986, now seen corresponding path program 3 times [2024-06-27 21:04:07,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:07,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949602454] [2024-06-27 21:04:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:10,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:10,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949602454] [2024-06-27 21:04:10,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949602454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:10,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:10,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:10,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127243522] [2024-06-27 21:04:10,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:10,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:10,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:10,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:10,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:10,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 236 transitions, 3925 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:10,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:10,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:10,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:13,318 INFO L124 PetriNetUnfolderBase]: 6706/10923 cut-off events. [2024-06-27 21:04:13,319 INFO L125 PetriNetUnfolderBase]: For 373166/373172 co-relation queries the response was YES. [2024-06-27 21:04:13,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63867 conditions, 10923 events. 6706/10923 cut-off events. For 373166/373172 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 76690 event pairs, 2763 based on Foata normal form. 54/10975 useless extension candidates. Maximal degree in co-relation 63771. Up to 7795 conditions per place. [2024-06-27 21:04:13,440 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 105 changer transitions 8/299 dead transitions. [2024-06-27 21:04:13,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 299 transitions, 4875 flow [2024-06-27 21:04:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:04:13,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 21:04:13,442 INFO L175 Difference]: Start difference. First operand has 196 places, 236 transitions, 3925 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:04:13,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 299 transitions, 4875 flow [2024-06-27 21:04:14,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 299 transitions, 4565 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 21:04:14,275 INFO L231 Difference]: Finished difference. Result has 197 places, 234 transitions, 3838 flow [2024-06-27 21:04:14,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3838, PETRI_PLACES=197, PETRI_TRANSITIONS=234} [2024-06-27 21:04:14,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 21:04:14,276 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 234 transitions, 3838 flow [2024-06-27 21:04:14,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:14,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:14,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:04:14,276 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:14,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1235017182, now seen corresponding path program 4 times [2024-06-27 21:04:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780476101] [2024-06-27 21:04:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:17,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780476101] [2024-06-27 21:04:17,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780476101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:17,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:17,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349044174] [2024-06-27 21:04:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:17,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:17,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:17,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:17,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 234 transitions, 3838 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:17,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:17,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:17,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:20,425 INFO L124 PetriNetUnfolderBase]: 6686/10894 cut-off events. [2024-06-27 21:04:20,426 INFO L125 PetriNetUnfolderBase]: For 408639/408686 co-relation queries the response was YES. [2024-06-27 21:04:20,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64184 conditions, 10894 events. 6686/10894 cut-off events. For 408639/408686 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 76162 event pairs, 2267 based on Foata normal form. 83/10973 useless extension candidates. Maximal degree in co-relation 64087. Up to 5940 conditions per place. [2024-06-27 21:04:20,538 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 138 changer transitions 12/311 dead transitions. [2024-06-27 21:04:20,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 311 transitions, 5056 flow [2024-06-27 21:04:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:20,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 21:04:20,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-27 21:04:20,540 INFO L175 Difference]: Start difference. First operand has 197 places, 234 transitions, 3838 flow. Second operand 10 states and 204 transitions. [2024-06-27 21:04:20,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 311 transitions, 5056 flow [2024-06-27 21:04:21,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 311 transitions, 4764 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 21:04:21,203 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 3743 flow [2024-06-27 21:04:21,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3743, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2024-06-27 21:04:21,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 21:04:21,204 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 3743 flow [2024-06-27 21:04:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:21,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:21,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:21,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:04:21,204 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 21:04:21,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -531410572, now seen corresponding path program 2 times [2024-06-27 21:04:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154405270] [2024-06-27 21:04:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:23,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:23,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154405270] [2024-06-27 21:04:23,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154405270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:23,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:23,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:04:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598874593] [2024-06-27 21:04:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:04:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:04:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:04:23,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:23,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 3743 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:23,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:23,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:23,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:25,335 INFO L124 PetriNetUnfolderBase]: 6110/9959 cut-off events. [2024-06-27 21:04:25,335 INFO L125 PetriNetUnfolderBase]: For 371492/371537 co-relation queries the response was YES. [2024-06-27 21:04:25,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60641 conditions, 9959 events. 6110/9959 cut-off events. For 371492/371537 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 68938 event pairs, 2591 based on Foata normal form. 35/9960 useless extension candidates. Maximal degree in co-relation 60544. Up to 9271 conditions per place. [2024-06-27 21:04:25,423 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 72 changer transitions 0/252 dead transitions. [2024-06-27 21:04:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 252 transitions, 4455 flow [2024-06-27 21:04:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:04:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:04:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:04:25,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:04:25,425 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 3743 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:04:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 252 transitions, 4455 flow [2024-06-27 21:04:26,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 252 transitions, 4115 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:26,004 INFO L231 Difference]: Finished difference. Result has 195 places, 234 transitions, 3598 flow [2024-06-27 21:04:26,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3598, PETRI_PLACES=195, PETRI_TRANSITIONS=234} [2024-06-27 21:04:26,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 21:04:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 234 transitions, 3598 flow [2024-06-27 21:04:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:26,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:26,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:26,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:04:26,006 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 21:04:26,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash -548377554, now seen corresponding path program 1 times [2024-06-27 21:04:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:26,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434199595] [2024-06-27 21:04:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434199595] [2024-06-27 21:04:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434199595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:28,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:28,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403912871] [2024-06-27 21:04:28,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:28,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:28,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:28,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 234 transitions, 3598 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 21:04:28,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:28,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:28,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:30,389 INFO L124 PetriNetUnfolderBase]: 5911/9618 cut-off events. [2024-06-27 21:04:30,389 INFO L125 PetriNetUnfolderBase]: For 349714/349737 co-relation queries the response was YES. [2024-06-27 21:04:30,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57129 conditions, 9618 events. 5911/9618 cut-off events. For 349714/349737 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 65759 event pairs, 2745 based on Foata normal form. 32/9624 useless extension candidates. Maximal degree in co-relation 57031. Up to 9282 conditions per place. [2024-06-27 21:04:30,484 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 224 selfloop transitions, 15 changer transitions 0/255 dead transitions. [2024-06-27 21:04:30,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 4176 flow [2024-06-27 21:04:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:04:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:04:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:04:30,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-27 21:04:30,485 INFO L175 Difference]: Start difference. First operand has 195 places, 234 transitions, 3598 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:04:30,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 4176 flow [2024-06-27 21:04:31,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 255 transitions, 3960 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:31,056 INFO L231 Difference]: Finished difference. Result has 195 places, 236 transitions, 3456 flow [2024-06-27 21:04:31,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3456, PETRI_PLACES=195, PETRI_TRANSITIONS=236} [2024-06-27 21:04:31,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 21:04:31,057 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 236 transitions, 3456 flow [2024-06-27 21:04:31,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 21:04:31,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:31,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:04:31,057 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 21:04:31,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1545302463, now seen corresponding path program 1 times [2024-06-27 21:04:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:31,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293484413] [2024-06-27 21:04:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:33,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293484413] [2024-06-27 21:04:33,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293484413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:33,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:33,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:33,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232254101] [2024-06-27 21:04:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:33,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:33,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:33,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:33,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 236 transitions, 3456 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 21:04:33,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:33,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:33,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:35,662 INFO L124 PetriNetUnfolderBase]: 6034/9794 cut-off events. [2024-06-27 21:04:35,662 INFO L125 PetriNetUnfolderBase]: For 334656/334656 co-relation queries the response was YES. [2024-06-27 21:04:35,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57588 conditions, 9794 events. 6034/9794 cut-off events. For 334656/334656 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 67174 event pairs, 2805 based on Foata normal form. 2/9794 useless extension candidates. Maximal degree in co-relation 57492. Up to 9512 conditions per place. [2024-06-27 21:04:35,739 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 31 changer transitions 0/278 dead transitions. [2024-06-27 21:04:35,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 278 transitions, 4350 flow [2024-06-27 21:04:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:04:35,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-27 21:04:35,741 INFO L175 Difference]: Start difference. First operand has 195 places, 236 transitions, 3456 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:04:35,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 278 transitions, 4350 flow [2024-06-27 21:04:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 278 transitions, 4298 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:04:36,274 INFO L231 Difference]: Finished difference. Result has 201 places, 245 transitions, 3665 flow [2024-06-27 21:04:36,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3665, PETRI_PLACES=201, PETRI_TRANSITIONS=245} [2024-06-27 21:04:36,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 21:04:36,275 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 245 transitions, 3665 flow [2024-06-27 21:04:36,275 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 21:04:36,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:36,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:36,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:04:36,275 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 21:04:36,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1545600993, now seen corresponding path program 2 times [2024-06-27 21:04:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062727360] [2024-06-27 21:04:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062727360] [2024-06-27 21:04:38,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062727360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:38,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:38,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053520357] [2024-06-27 21:04:38,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:38,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:38,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:38,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:38,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 245 transitions, 3665 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 21:04:38,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:38,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:38,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:40,689 INFO L124 PetriNetUnfolderBase]: 6028/9786 cut-off events. [2024-06-27 21:04:40,689 INFO L125 PetriNetUnfolderBase]: For 348192/348192 co-relation queries the response was YES. [2024-06-27 21:04:40,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57843 conditions, 9786 events. 6028/9786 cut-off events. For 348192/348192 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 67128 event pairs, 2805 based on Foata normal form. 2/9786 useless extension candidates. Maximal degree in co-relation 57745. Up to 9507 conditions per place. [2024-06-27 21:04:40,786 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 236 selfloop transitions, 27 changer transitions 0/267 dead transitions. [2024-06-27 21:04:40,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 267 transitions, 4257 flow [2024-06-27 21:04:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:04:40,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:04:40,787 INFO L175 Difference]: Start difference. First operand has 201 places, 245 transitions, 3665 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:04:40,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 267 transitions, 4257 flow [2024-06-27 21:04:41,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 267 transitions, 4207 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:04:41,208 INFO L231 Difference]: Finished difference. Result has 204 places, 245 transitions, 3676 flow [2024-06-27 21:04:41,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3676, PETRI_PLACES=204, PETRI_TRANSITIONS=245} [2024-06-27 21:04:41,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:04:41,209 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 245 transitions, 3676 flow [2024-06-27 21:04:41,209 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 21:04:41,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:41,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:04:41,209 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 21:04:41,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1899864033, now seen corresponding path program 3 times [2024-06-27 21:04:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801929924] [2024-06-27 21:04:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:43,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801929924] [2024-06-27 21:04:43,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801929924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:43,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657033662] [2024-06-27 21:04:43,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:43,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:43,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 245 transitions, 3676 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 21:04:43,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:43,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:45,649 INFO L124 PetriNetUnfolderBase]: 6022/9788 cut-off events. [2024-06-27 21:04:45,649 INFO L125 PetriNetUnfolderBase]: For 361785/361788 co-relation queries the response was YES. [2024-06-27 21:04:45,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58141 conditions, 9788 events. 6022/9788 cut-off events. For 361785/361788 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 67204 event pairs, 2729 based on Foata normal form. 2/9786 useless extension candidates. Maximal degree in co-relation 58041. Up to 9477 conditions per place. [2024-06-27 21:04:45,750 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-27 21:04:45,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 269 transitions, 4339 flow [2024-06-27 21:04:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 21:04:45,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-27 21:04:45,751 INFO L175 Difference]: Start difference. First operand has 204 places, 245 transitions, 3676 flow. Second operand 7 states and 107 transitions. [2024-06-27 21:04:45,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 269 transitions, 4339 flow [2024-06-27 21:04:46,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 269 transitions, 4285 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:46,396 INFO L231 Difference]: Finished difference. Result has 207 places, 253 transitions, 3815 flow [2024-06-27 21:04:46,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3815, PETRI_PLACES=207, PETRI_TRANSITIONS=253} [2024-06-27 21:04:46,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 21:04:46,397 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 253 transitions, 3815 flow [2024-06-27 21:04:46,397 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 21:04:46,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:46,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:04:46,398 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 21:04:46,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1681384077, now seen corresponding path program 1 times [2024-06-27 21:04:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:46,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251362091] [2024-06-27 21:04:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:46,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:49,341 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 21:04:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251362091] [2024-06-27 21:04:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251362091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:49,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529233801] [2024-06-27 21:04:49,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:49,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:49,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:49,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:49,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 253 transitions, 3815 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:49,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:49,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:49,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:51,734 INFO L124 PetriNetUnfolderBase]: 5979/9712 cut-off events. [2024-06-27 21:04:51,734 INFO L125 PetriNetUnfolderBase]: For 391637/391656 co-relation queries the response was YES. [2024-06-27 21:04:51,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58308 conditions, 9712 events. 5979/9712 cut-off events. For 391637/391656 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 66677 event pairs, 2718 based on Foata normal form. 28/9716 useless extension candidates. Maximal degree in co-relation 58205. Up to 9101 conditions per place. [2024-06-27 21:04:51,841 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 70 changer transitions 0/287 dead transitions. [2024-06-27 21:04:51,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 287 transitions, 4497 flow [2024-06-27 21:04:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:04:51,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:04:51,843 INFO L175 Difference]: Start difference. First operand has 207 places, 253 transitions, 3815 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:04:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 287 transitions, 4497 flow [2024-06-27 21:04:52,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 287 transitions, 4433 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:52,335 INFO L231 Difference]: Finished difference. Result has 212 places, 255 transitions, 3953 flow [2024-06-27 21:04:52,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3953, PETRI_PLACES=212, PETRI_TRANSITIONS=255} [2024-06-27 21:04:52,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 21:04:52,336 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 255 transitions, 3953 flow [2024-06-27 21:04:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:52,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:52,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:52,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:04:52,336 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 21:04:52,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1233368489, now seen corresponding path program 2 times [2024-06-27 21:04:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22679230] [2024-06-27 21:04:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22679230] [2024-06-27 21:04:55,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22679230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:55,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:55,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:55,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016200784] [2024-06-27 21:04:55,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:55,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:55,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:55,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:55,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 255 transitions, 3953 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:55,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:55,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:55,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:57,341 INFO L124 PetriNetUnfolderBase]: 6037/9838 cut-off events. [2024-06-27 21:04:57,342 INFO L125 PetriNetUnfolderBase]: For 410790/410835 co-relation queries the response was YES. [2024-06-27 21:04:57,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59578 conditions, 9838 events. 6037/9838 cut-off events. For 410790/410835 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 67821 event pairs, 2492 based on Foata normal form. 43/9848 useless extension candidates. Maximal degree in co-relation 59474. Up to 9073 conditions per place. [2024-06-27 21:04:57,452 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-27 21:04:57,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 282 transitions, 4773 flow [2024-06-27 21:04:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:04:57,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:04:57,454 INFO L175 Difference]: Start difference. First operand has 212 places, 255 transitions, 3953 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:04:57,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 282 transitions, 4773 flow [2024-06-27 21:04:58,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 4617 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:58,183 INFO L231 Difference]: Finished difference. Result has 213 places, 257 transitions, 4016 flow [2024-06-27 21:04:58,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4016, PETRI_PLACES=213, PETRI_TRANSITIONS=257} [2024-06-27 21:04:58,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 21:04:58,184 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 257 transitions, 4016 flow [2024-06-27 21:04:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:58,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:58,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:04:58,185 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 21:04:58,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:58,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1290207085, now seen corresponding path program 3 times [2024-06-27 21:04:58,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:58,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100558148] [2024-06-27 21:04:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:00,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100558148] [2024-06-27 21:05:00,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100558148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:00,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:00,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855926873] [2024-06-27 21:05:00,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:00,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:00,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:05:00,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 257 transitions, 4016 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:00,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:00,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:05:00,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:03,398 INFO L124 PetriNetUnfolderBase]: 6144/10001 cut-off events. [2024-06-27 21:05:03,398 INFO L125 PetriNetUnfolderBase]: For 437828/437871 co-relation queries the response was YES. [2024-06-27 21:05:03,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61182 conditions, 10001 events. 6144/10001 cut-off events. For 437828/437871 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 69019 event pairs, 2452 based on Foata normal form. 43/10011 useless extension candidates. Maximal degree in co-relation 61077. Up to 8896 conditions per place. [2024-06-27 21:05:03,493 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 87 changer transitions 0/290 dead transitions. [2024-06-27 21:05:03,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4994 flow [2024-06-27 21:05:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:05:03,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 21:05:03,495 INFO L175 Difference]: Start difference. First operand has 213 places, 257 transitions, 4016 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:05:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4994 flow [2024-06-27 21:05:04,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 290 transitions, 4799 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:04,180 INFO L231 Difference]: Finished difference. Result has 215 places, 260 transitions, 4068 flow [2024-06-27 21:05:04,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4068, PETRI_PLACES=215, PETRI_TRANSITIONS=260} [2024-06-27 21:05:04,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-27 21:05:04,181 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 260 transitions, 4068 flow [2024-06-27 21:05:04,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:04,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:04,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:04,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:05:04,181 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 21:05:04,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash -879124100, now seen corresponding path program 1 times [2024-06-27 21:05:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011786815] [2024-06-27 21:05:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011786815] [2024-06-27 21:05:06,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011786815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:06,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:06,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282084993] [2024-06-27 21:05:06,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:06,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:06,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:06,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:06,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 260 transitions, 4068 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 21:05:06,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:06,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:06,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:09,326 INFO L124 PetriNetUnfolderBase]: 6276/10176 cut-off events. [2024-06-27 21:05:09,326 INFO L125 PetriNetUnfolderBase]: For 446681/446681 co-relation queries the response was YES. [2024-06-27 21:05:09,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62568 conditions, 10176 events. 6276/10176 cut-off events. For 446681/446681 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 69872 event pairs, 2733 based on Foata normal form. 8/10182 useless extension candidates. Maximal degree in co-relation 62462. Up to 9748 conditions per place. [2024-06-27 21:05:09,442 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 35 changer transitions 0/307 dead transitions. [2024-06-27 21:05:09,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 307 transitions, 4931 flow [2024-06-27 21:05:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:05:09,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-27 21:05:09,444 INFO L175 Difference]: Start difference. First operand has 215 places, 260 transitions, 4068 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:05:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 307 transitions, 4931 flow [2024-06-27 21:05:10,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 307 transitions, 4794 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:10,142 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 4014 flow [2024-06-27 21:05:10,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4014, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-27 21:05:10,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 21:05:10,142 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 4014 flow [2024-06-27 21:05:10,142 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 21:05:10,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:10,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:10,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:05:10,143 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 21:05:10,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:10,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1022955426, now seen corresponding path program 2 times [2024-06-27 21:05:10,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:10,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23652146] [2024-06-27 21:05:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:13,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23652146] [2024-06-27 21:05:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23652146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:13,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:13,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384283470] [2024-06-27 21:05:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:13,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 4014 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 21:05:13,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:13,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:13,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:15,729 INFO L124 PetriNetUnfolderBase]: 6312/10232 cut-off events. [2024-06-27 21:05:15,729 INFO L125 PetriNetUnfolderBase]: For 463338/463338 co-relation queries the response was YES. [2024-06-27 21:05:15,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63062 conditions, 10232 events. 6312/10232 cut-off events. For 463338/463338 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 70447 event pairs, 2888 based on Foata normal form. 10/10240 useless extension candidates. Maximal degree in co-relation 62954. Up to 9903 conditions per place. [2024-06-27 21:05:15,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 32 changer transitions 0/300 dead transitions. [2024-06-27 21:05:15,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 4743 flow [2024-06-27 21:05:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:05:15,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:05:15,829 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 4014 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:05:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 4743 flow [2024-06-27 21:05:16,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 300 transitions, 4680 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:16,574 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 4033 flow [2024-06-27 21:05:16,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4033, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-27 21:05:16,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:05:16,575 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 4033 flow [2024-06-27 21:05:16,575 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 21:05:16,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:16,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:16,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:05:16,575 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 21:05:16,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -736068096, now seen corresponding path program 3 times [2024-06-27 21:05:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023906673] [2024-06-27 21:05:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:19,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:19,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023906673] [2024-06-27 21:05:19,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023906673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:19,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:19,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:19,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575882226] [2024-06-27 21:05:19,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:19,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:19,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:19,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 4033 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 21:05:19,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:19,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:19,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:21,366 INFO L124 PetriNetUnfolderBase]: 6289/10199 cut-off events. [2024-06-27 21:05:21,366 INFO L125 PetriNetUnfolderBase]: For 470187/470187 co-relation queries the response was YES. [2024-06-27 21:05:21,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62835 conditions, 10199 events. 6289/10199 cut-off events. For 470187/470187 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 70097 event pairs, 2879 based on Foata normal form. 10/10207 useless extension candidates. Maximal degree in co-relation 62726. Up to 9870 conditions per place. [2024-06-27 21:05:21,473 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 258 selfloop transitions, 28 changer transitions 0/290 dead transitions. [2024-06-27 21:05:21,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 290 transitions, 4703 flow [2024-06-27 21:05:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:05:21,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:05:21,475 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 4033 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:05:21,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 290 transitions, 4703 flow [2024-06-27 21:05:22,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 290 transitions, 4640 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:05:22,231 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 4031 flow [2024-06-27 21:05:22,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4031, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-27 21:05:22,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:05:22,232 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 4031 flow [2024-06-27 21:05:22,232 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 21:05:22,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:22,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:22,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:05:22,233 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 21:05:22,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1028666370, now seen corresponding path program 1 times [2024-06-27 21:05:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:22,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728247234] [2024-06-27 21:05:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:24,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:24,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728247234] [2024-06-27 21:05:24,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728247234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:24,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:24,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:24,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901230396] [2024-06-27 21:05:24,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:24,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:24,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:24,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:24,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:24,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:24,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 4031 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 21:05:24,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:24,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:24,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:27,040 INFO L124 PetriNetUnfolderBase]: 6287/10204 cut-off events. [2024-06-27 21:05:27,041 INFO L125 PetriNetUnfolderBase]: For 479418/479424 co-relation queries the response was YES. [2024-06-27 21:05:27,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63009 conditions, 10204 events. 6287/10204 cut-off events. For 479418/479424 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 70308 event pairs, 2700 based on Foata normal form. 12/10214 useless extension candidates. Maximal degree in co-relation 62899. Up to 9034 conditions per place. [2024-06-27 21:05:27,155 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 127 changer transitions 1/321 dead transitions. [2024-06-27 21:05:27,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 321 transitions, 5051 flow [2024-06-27 21:05:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:05:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:05:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 21:05:27,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43680709534368073 [2024-06-27 21:05:27,157 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 4031 flow. Second operand 11 states and 197 transitions. [2024-06-27 21:05:27,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 321 transitions, 5051 flow [2024-06-27 21:05:27,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 321 transitions, 4985 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:27,996 INFO L231 Difference]: Finished difference. Result has 229 places, 264 transitions, 4250 flow [2024-06-27 21:05:27,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4250, PETRI_PLACES=229, PETRI_TRANSITIONS=264} [2024-06-27 21:05:27,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 21:05:27,997 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 264 transitions, 4250 flow [2024-06-27 21:05:27,998 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 21:05:27,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:27,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:27,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:05:27,998 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 21:05:27,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1661231388, now seen corresponding path program 2 times [2024-06-27 21:05:27,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:27,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2732560] [2024-06-27 21:05:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:30,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:30,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2732560] [2024-06-27 21:05:30,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2732560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:30,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:30,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:30,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996066231] [2024-06-27 21:05:30,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:30,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:30,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:30,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:30,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:30,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 264 transitions, 4250 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 21:05:30,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:30,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:30,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:33,016 INFO L124 PetriNetUnfolderBase]: 6419/10424 cut-off events. [2024-06-27 21:05:33,017 INFO L125 PetriNetUnfolderBase]: For 515299/515305 co-relation queries the response was YES. [2024-06-27 21:05:33,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66161 conditions, 10424 events. 6419/10424 cut-off events. For 515299/515305 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 71990 event pairs, 2668 based on Foata normal form. 8/10430 useless extension candidates. Maximal degree in co-relation 66050. Up to 9128 conditions per place. [2024-06-27 21:05:33,114 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 142 changer transitions 1/324 dead transitions. [2024-06-27 21:05:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 324 transitions, 5496 flow [2024-06-27 21:05:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 21:05:33,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-27 21:05:33,116 INFO L175 Difference]: Start difference. First operand has 229 places, 264 transitions, 4250 flow. Second operand 10 states and 176 transitions. [2024-06-27 21:05:33,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 324 transitions, 5496 flow [2024-06-27 21:05:33,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 324 transitions, 5228 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:05:33,827 INFO L231 Difference]: Finished difference. Result has 232 places, 277 transitions, 4572 flow [2024-06-27 21:05:33,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4572, PETRI_PLACES=232, PETRI_TRANSITIONS=277} [2024-06-27 21:05:33,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 21:05:33,828 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 277 transitions, 4572 flow [2024-06-27 21:05:33,828 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 21:05:33,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:33,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:33,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:05:33,828 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 21:05:33,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash -913375200, now seen corresponding path program 3 times [2024-06-27 21:05:33,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:33,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255512577] [2024-06-27 21:05:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:36,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:36,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255512577] [2024-06-27 21:05:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255512577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:36,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756916675] [2024-06-27 21:05:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:36,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:36,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 277 transitions, 4572 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 21:05:36,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:36,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:36,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:39,103 INFO L124 PetriNetUnfolderBase]: 6397/10380 cut-off events. [2024-06-27 21:05:39,103 INFO L125 PetriNetUnfolderBase]: For 531957/531959 co-relation queries the response was YES. [2024-06-27 21:05:39,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66171 conditions, 10380 events. 6397/10380 cut-off events. For 531957/531959 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 71547 event pairs, 2770 based on Foata normal form. 8/10386 useless extension candidates. Maximal degree in co-relation 66058. Up to 9451 conditions per place. [2024-06-27 21:05:39,217 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 106 changer transitions 1/324 dead transitions. [2024-06-27 21:05:39,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 324 transitions, 5450 flow [2024-06-27 21:05:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:05:39,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:05:39,218 INFO L175 Difference]: Start difference. First operand has 232 places, 277 transitions, 4572 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:05:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 324 transitions, 5450 flow [2024-06-27 21:05:40,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 324 transitions, 5252 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:40,169 INFO L231 Difference]: Finished difference. Result has 236 places, 276 transitions, 4576 flow [2024-06-27 21:05:40,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4576, PETRI_PLACES=236, PETRI_TRANSITIONS=276} [2024-06-27 21:05:40,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-27 21:05:40,170 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 276 transitions, 4576 flow [2024-06-27 21:05:40,170 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 21:05:40,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:40,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:40,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:05:40,171 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 21:05:40,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -913076670, now seen corresponding path program 4 times [2024-06-27 21:05:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:40,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069730198] [2024-06-27 21:05:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:42,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069730198] [2024-06-27 21:05:42,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069730198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:42,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840464861] [2024-06-27 21:05:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:42,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:42,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 276 transitions, 4576 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 21:05:42,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:42,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:42,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:45,853 INFO L124 PetriNetUnfolderBase]: 6315/10244 cut-off events. [2024-06-27 21:05:45,854 INFO L125 PetriNetUnfolderBase]: For 542321/542323 co-relation queries the response was YES. [2024-06-27 21:05:45,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65446 conditions, 10244 events. 6315/10244 cut-off events. For 542321/542323 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 70485 event pairs, 2725 based on Foata normal form. 8/10250 useless extension candidates. Maximal degree in co-relation 65332. Up to 9340 conditions per place. [2024-06-27 21:05:45,953 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 106 changer transitions 2/329 dead transitions. [2024-06-27 21:05:45,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 329 transitions, 5478 flow [2024-06-27 21:05:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:05:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:05:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-27 21:05:45,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 21:05:45,954 INFO L175 Difference]: Start difference. First operand has 236 places, 276 transitions, 4576 flow. Second operand 12 states and 200 transitions. [2024-06-27 21:05:45,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 329 transitions, 5478 flow [2024-06-27 21:05:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 329 transitions, 5315 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:46,902 INFO L231 Difference]: Finished difference. Result has 241 places, 274 transitions, 4589 flow [2024-06-27 21:05:46,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4589, PETRI_PLACES=241, PETRI_TRANSITIONS=274} [2024-06-27 21:05:46,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 21:05:46,903 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 274 transitions, 4589 flow [2024-06-27 21:05:46,903 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 21:05:46,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:46,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:46,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:05:46,904 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 21:05:46,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1948118718, now seen corresponding path program 5 times [2024-06-27 21:05:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:46,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958707431] [2024-06-27 21:05:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:46,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958707431] [2024-06-27 21:05:49,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958707431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:49,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:49,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:49,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111830646] [2024-06-27 21:05:49,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:49,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:49,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:49,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:49,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:49,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:49,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 274 transitions, 4589 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 21:05:49,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:49,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:49,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:51,663 INFO L124 PetriNetUnfolderBase]: 6069/9858 cut-off events. [2024-06-27 21:05:51,663 INFO L125 PetriNetUnfolderBase]: For 552802/552804 co-relation queries the response was YES. [2024-06-27 21:05:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64111 conditions, 9858 events. 6069/9858 cut-off events. For 552802/552804 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 67356 event pairs, 2541 based on Foata normal form. 4/9860 useless extension candidates. Maximal degree in co-relation 63996. Up to 8647 conditions per place. [2024-06-27 21:05:51,789 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 128 changer transitions 2/308 dead transitions. [2024-06-27 21:05:51,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 308 transitions, 5497 flow [2024-06-27 21:05:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:05:51,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:05:51,790 INFO L175 Difference]: Start difference. First operand has 241 places, 274 transitions, 4589 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:05:51,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 308 transitions, 5497 flow [2024-06-27 21:05:52,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 308 transitions, 5254 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:52,849 INFO L231 Difference]: Finished difference. Result has 241 places, 272 transitions, 4585 flow [2024-06-27 21:05:52,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4585, PETRI_PLACES=241, PETRI_TRANSITIONS=272} [2024-06-27 21:05:52,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 21:05:52,850 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 272 transitions, 4585 flow [2024-06-27 21:05:52,850 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 21:05:52,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:52,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:52,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:05:52,850 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 21:05:52,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1948238688, now seen corresponding path program 6 times [2024-06-27 21:05:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509454840] [2024-06-27 21:05:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:52,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509454840] [2024-06-27 21:05:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509454840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676151315] [2024-06-27 21:05:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:55,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:55,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:55,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 272 transitions, 4585 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 21:05:55,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:55,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:55,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:58,064 INFO L124 PetriNetUnfolderBase]: 5843/9444 cut-off events. [2024-06-27 21:05:58,064 INFO L125 PetriNetUnfolderBase]: For 569465/569471 co-relation queries the response was YES. [2024-06-27 21:05:58,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63028 conditions, 9444 events. 5843/9444 cut-off events. For 569465/569471 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 63567 event pairs, 2517 based on Foata normal form. 8/9450 useless extension candidates. Maximal degree in co-relation 62912. Up to 8908 conditions per place. [2024-06-27 21:05:58,150 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 74 changer transitions 4/301 dead transitions. [2024-06-27 21:05:58,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 301 transitions, 5259 flow [2024-06-27 21:05:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:05:58,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 21:05:58,152 INFO L175 Difference]: Start difference. First operand has 241 places, 272 transitions, 4585 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:05:58,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 301 transitions, 5259 flow [2024-06-27 21:05:59,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 301 transitions, 4848 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 21:05:59,065 INFO L231 Difference]: Finished difference. Result has 239 places, 268 transitions, 4261 flow [2024-06-27 21:05:59,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4261, PETRI_PLACES=239, PETRI_TRANSITIONS=268} [2024-06-27 21:05:59,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:05:59,066 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 268 transitions, 4261 flow [2024-06-27 21:05:59,066 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 21:05:59,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:59,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:59,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:05:59,066 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 21:05:59,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -735699134, now seen corresponding path program 1 times [2024-06-27 21:05:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:59,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020126700] [2024-06-27 21:05:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:59,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020126700] [2024-06-27 21:06:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020126700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250802110] [2024-06-27 21:06:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:02,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:02,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:02,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:02,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 268 transitions, 4261 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 21:06:02,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:02,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:02,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:04,102 INFO L124 PetriNetUnfolderBase]: 5691/9237 cut-off events. [2024-06-27 21:06:04,102 INFO L125 PetriNetUnfolderBase]: For 584231/584231 co-relation queries the response was YES. [2024-06-27 21:06:04,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61728 conditions, 9237 events. 5691/9237 cut-off events. For 584231/584231 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62080 event pairs, 2486 based on Foata normal form. 6/9241 useless extension candidates. Maximal degree in co-relation 61612. Up to 8798 conditions per place. [2024-06-27 21:06:04,210 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 30 changer transitions 0/301 dead transitions. [2024-06-27 21:06:04,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 301 transitions, 5003 flow [2024-06-27 21:06:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:06:04,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 21:06:04,211 INFO L175 Difference]: Start difference. First operand has 239 places, 268 transitions, 4261 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:06:04,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 301 transitions, 5003 flow [2024-06-27 21:06:05,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 301 transitions, 4674 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 21:06:05,475 INFO L231 Difference]: Finished difference. Result has 236 places, 271 transitions, 4046 flow [2024-06-27 21:06:05,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4046, PETRI_PLACES=236, PETRI_TRANSITIONS=271} [2024-06-27 21:06:05,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-27 21:06:05,475 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 271 transitions, 4046 flow [2024-06-27 21:06:05,476 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 21:06:05,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:05,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:06:05,476 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 21:06:05,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 408296960, now seen corresponding path program 4 times [2024-06-27 21:06:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:05,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935420025] [2024-06-27 21:06:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:05,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:08,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935420025] [2024-06-27 21:06:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935420025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255746032] [2024-06-27 21:06:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:08,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:08,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:08,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 271 transitions, 4046 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 21:06:08,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:08,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:08,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:10,790 INFO L124 PetriNetUnfolderBase]: 5701/9257 cut-off events. [2024-06-27 21:06:10,791 INFO L125 PetriNetUnfolderBase]: For 562171/562174 co-relation queries the response was YES. [2024-06-27 21:06:10,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60564 conditions, 9257 events. 5701/9257 cut-off events. For 562171/562174 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 62215 event pairs, 2460 based on Foata normal form. 10/9263 useless extension candidates. Maximal degree in co-relation 60448. Up to 8868 conditions per place. [2024-06-27 21:06:10,881 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 33 changer transitions 0/294 dead transitions. [2024-06-27 21:06:10,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 294 transitions, 4720 flow [2024-06-27 21:06:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:06:10,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:06:10,883 INFO L175 Difference]: Start difference. First operand has 236 places, 271 transitions, 4046 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:06:10,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 294 transitions, 4720 flow [2024-06-27 21:06:12,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 294 transitions, 4666 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:12,032 INFO L231 Difference]: Finished difference. Result has 240 places, 272 transitions, 4081 flow [2024-06-27 21:06:12,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4081, PETRI_PLACES=240, PETRI_TRANSITIONS=272} [2024-06-27 21:06:12,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 21:06:12,033 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 272 transitions, 4081 flow [2024-06-27 21:06:12,033 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 21:06:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:12,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:06:12,033 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 21:06:12,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2045412762, now seen corresponding path program 1 times [2024-06-27 21:06:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:12,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425522296] [2024-06-27 21:06:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:14,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425522296] [2024-06-27 21:06:14,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425522296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:14,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:14,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:14,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349621898] [2024-06-27 21:06:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:14,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:14,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:14,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 272 transitions, 4081 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 21:06:14,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:14,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:14,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:16,892 INFO L124 PetriNetUnfolderBase]: 5689/9245 cut-off events. [2024-06-27 21:06:16,892 INFO L125 PetriNetUnfolderBase]: For 567318/567365 co-relation queries the response was YES. [2024-06-27 21:06:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60690 conditions, 9245 events. 5689/9245 cut-off events. For 567318/567365 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62213 event pairs, 2179 based on Foata normal form. 39/9280 useless extension candidates. Maximal degree in co-relation 60572. Up to 8520 conditions per place. [2024-06-27 21:06:16,990 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 220 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-06-27 21:06:16,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 299 transitions, 4853 flow [2024-06-27 21:06:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:06:16,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:06:16,995 INFO L175 Difference]: Start difference. First operand has 240 places, 272 transitions, 4081 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:06:16,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 299 transitions, 4853 flow [2024-06-27 21:06:18,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 299 transitions, 4768 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:18,143 INFO L231 Difference]: Finished difference. Result has 241 places, 272 transitions, 4152 flow [2024-06-27 21:06:18,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4152, PETRI_PLACES=241, PETRI_TRANSITIONS=272} [2024-06-27 21:06:18,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 21:06:18,145 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 272 transitions, 4152 flow [2024-06-27 21:06:18,145 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 21:06:18,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:18,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:18,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:06:18,146 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 21:06:18,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1528788848, now seen corresponding path program 7 times [2024-06-27 21:06:18,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924848313] [2024-06-27 21:06:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:18,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:20,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924848313] [2024-06-27 21:06:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924848313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:20,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:20,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:20,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459532519] [2024-06-27 21:06:20,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:20,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:20,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:20,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 272 transitions, 4152 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 21:06:20,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:20,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:20,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:22,939 INFO L124 PetriNetUnfolderBase]: 5671/9218 cut-off events. [2024-06-27 21:06:22,940 INFO L125 PetriNetUnfolderBase]: For 580640/580646 co-relation queries the response was YES. [2024-06-27 21:06:23,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60727 conditions, 9218 events. 5671/9218 cut-off events. For 580640/580646 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 62139 event pairs, 2359 based on Foata normal form. 12/9228 useless extension candidates. Maximal degree in co-relation 60608. Up to 8182 conditions per place. [2024-06-27 21:06:23,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 118 changer transitions 1/315 dead transitions. [2024-06-27 21:06:23,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 315 transitions, 5008 flow [2024-06-27 21:06:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:06:23,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 21:06:23,051 INFO L175 Difference]: Start difference. First operand has 241 places, 272 transitions, 4152 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:06:23,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 315 transitions, 5008 flow [2024-06-27 21:06:24,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 315 transitions, 4800 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:24,223 INFO L231 Difference]: Finished difference. Result has 244 places, 271 transitions, 4189 flow [2024-06-27 21:06:24,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4189, PETRI_PLACES=244, PETRI_TRANSITIONS=271} [2024-06-27 21:06:24,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 21:06:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 271 transitions, 4189 flow [2024-06-27 21:06:24,224 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 21:06:24,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:24,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:24,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:06:24,224 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 21:06:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1429490976, now seen corresponding path program 8 times [2024-06-27 21:06:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:24,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315624773] [2024-06-27 21:06:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:26,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:26,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315624773] [2024-06-27 21:06:26,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315624773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:26,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:26,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:26,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359251979] [2024-06-27 21:06:26,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:26,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:26,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:26,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:26,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 4189 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 21:06:26,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:26,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:26,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:28,875 INFO L124 PetriNetUnfolderBase]: 5593/9094 cut-off events. [2024-06-27 21:06:28,876 INFO L125 PetriNetUnfolderBase]: For 590765/590771 co-relation queries the response was YES. [2024-06-27 21:06:28,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60365 conditions, 9094 events. 5593/9094 cut-off events. For 590765/590771 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 61103 event pairs, 2326 based on Foata normal form. 12/9104 useless extension candidates. Maximal degree in co-relation 60245. Up to 8071 conditions per place. [2024-06-27 21:06:28,964 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 114 changer transitions 3/309 dead transitions. [2024-06-27 21:06:28,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 309 transitions, 4907 flow [2024-06-27 21:06:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:06:28,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:06:28,965 INFO L175 Difference]: Start difference. First operand has 244 places, 271 transitions, 4189 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:06:28,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 309 transitions, 4907 flow [2024-06-27 21:06:29,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 309 transitions, 4686 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 21:06:29,984 INFO L231 Difference]: Finished difference. Result has 244 places, 269 transitions, 4186 flow [2024-06-27 21:06:29,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4186, PETRI_PLACES=244, PETRI_TRANSITIONS=269} [2024-06-27 21:06:29,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 21:06:29,984 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 269 transitions, 4186 flow [2024-06-27 21:06:29,984 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 21:06:29,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:29,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:29,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:06:29,985 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 21:06:29,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:29,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1783754202, now seen corresponding path program 2 times [2024-06-27 21:06:29,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563456097] [2024-06-27 21:06:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:29,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:32,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:32,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563456097] [2024-06-27 21:06:32,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563456097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:32,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:32,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234572973] [2024-06-27 21:06:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:32,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:32,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 269 transitions, 4186 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 21:06:32,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:32,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:32,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:34,736 INFO L124 PetriNetUnfolderBase]: 5417/8810 cut-off events. [2024-06-27 21:06:34,736 INFO L125 PetriNetUnfolderBase]: For 563451/563496 co-relation queries the response was YES. [2024-06-27 21:06:34,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58812 conditions, 8810 events. 5417/8810 cut-off events. For 563451/563496 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 58673 event pairs, 2041 based on Foata normal form. 28/8833 useless extension candidates. Maximal degree in co-relation 58693. Up to 8096 conditions per place. [2024-06-27 21:06:34,836 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 80 changer transitions 0/287 dead transitions. [2024-06-27 21:06:34,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 287 transitions, 4796 flow [2024-06-27 21:06:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:06:34,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-27 21:06:34,838 INFO L175 Difference]: Start difference. First operand has 244 places, 269 transitions, 4186 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:06:34,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 287 transitions, 4796 flow [2024-06-27 21:06:35,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 287 transitions, 4390 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-27 21:06:35,981 INFO L231 Difference]: Finished difference. Result has 238 places, 269 transitions, 3946 flow [2024-06-27 21:06:35,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3946, PETRI_PLACES=238, PETRI_TRANSITIONS=269} [2024-06-27 21:06:35,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 21:06:35,982 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 269 transitions, 3946 flow [2024-06-27 21:06:35,982 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 21:06:35,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:35,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:35,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:06:35,982 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 21:06:35,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 63626372, now seen corresponding path program 9 times [2024-06-27 21:06:35,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:35,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600234717] [2024-06-27 21:06:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:35,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600234717] [2024-06-27 21:06:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600234717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057392764] [2024-06-27 21:06:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:38,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:38,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 269 transitions, 3946 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 21:06:38,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:38,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:38,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:40,891 INFO L124 PetriNetUnfolderBase]: 5431/8838 cut-off events. [2024-06-27 21:06:40,891 INFO L125 PetriNetUnfolderBase]: For 538955/539000 co-relation queries the response was YES. [2024-06-27 21:06:40,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57828 conditions, 8838 events. 5431/8838 cut-off events. For 538955/539000 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 58955 event pairs, 2019 based on Foata normal form. 30/8863 useless extension candidates. Maximal degree in co-relation 57710. Up to 7517 conditions per place. [2024-06-27 21:06:41,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 150 changer transitions 0/307 dead transitions. [2024-06-27 21:06:41,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 307 transitions, 4891 flow [2024-06-27 21:06:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:06:41,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 21:06:41,007 INFO L175 Difference]: Start difference. First operand has 238 places, 269 transitions, 3946 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:06:41,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 307 transitions, 4891 flow [2024-06-27 21:06:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 4652 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:42,189 INFO L231 Difference]: Finished difference. Result has 240 places, 272 transitions, 4053 flow [2024-06-27 21:06:42,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4053, PETRI_PLACES=240, PETRI_TRANSITIONS=272} [2024-06-27 21:06:42,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 21:06:42,189 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 272 transitions, 4053 flow [2024-06-27 21:06:42,190 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 21:06:42,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:42,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:42,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:06:42,190 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 21:06:42,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash 928043012, now seen corresponding path program 10 times [2024-06-27 21:06:42,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:42,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260896461] [2024-06-27 21:06:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:42,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:44,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260896461] [2024-06-27 21:06:44,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260896461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:44,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:44,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109328907] [2024-06-27 21:06:44,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:44,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:44,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:44,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:44,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 272 transitions, 4053 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 21:06:44,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:44,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:44,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:47,449 INFO L124 PetriNetUnfolderBase]: 5425/8812 cut-off events. [2024-06-27 21:06:47,449 INFO L125 PetriNetUnfolderBase]: For 550166/550188 co-relation queries the response was YES. [2024-06-27 21:06:47,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58125 conditions, 8812 events. 5425/8812 cut-off events. For 550166/550188 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 58739 event pairs, 2108 based on Foata normal form. 4/8811 useless extension candidates. Maximal degree in co-relation 58007. Up to 7406 conditions per place. [2024-06-27 21:06:47,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 138 changer transitions 0/302 dead transitions. [2024-06-27 21:06:47,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 302 transitions, 5021 flow [2024-06-27 21:06:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:06:47,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:06:47,539 INFO L175 Difference]: Start difference. First operand has 240 places, 272 transitions, 4053 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:06:47,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 302 transitions, 5021 flow [2024-06-27 21:06:48,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 302 transitions, 4621 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:48,574 INFO L231 Difference]: Finished difference. Result has 241 places, 278 transitions, 4104 flow [2024-06-27 21:06:48,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4104, PETRI_PLACES=241, PETRI_TRANSITIONS=278} [2024-06-27 21:06:48,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 21:06:48,575 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 278 transitions, 4104 flow [2024-06-27 21:06:48,575 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 21:06:48,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:48,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:48,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:06:48,575 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 21:06:48,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 808163232, now seen corresponding path program 2 times [2024-06-27 21:06:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:48,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820006096] [2024-06-27 21:06:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:48,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820006096] [2024-06-27 21:06:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820006096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742968510] [2024-06-27 21:06:51,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:51,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:51,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 278 transitions, 4104 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 21:06:51,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:51,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:51,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:53,909 INFO L124 PetriNetUnfolderBase]: 5445/8865 cut-off events. [2024-06-27 21:06:53,910 INFO L125 PetriNetUnfolderBase]: For 579840/579843 co-relation queries the response was YES. [2024-06-27 21:06:53,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59847 conditions, 8865 events. 5445/8865 cut-off events. For 579840/579843 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59250 event pairs, 2298 based on Foata normal form. 6/8867 useless extension candidates. Maximal degree in co-relation 59728. Up to 8434 conditions per place. [2024-06-27 21:06:54,012 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 35 changer transitions 0/305 dead transitions. [2024-06-27 21:06:54,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 305 transitions, 4848 flow [2024-06-27 21:06:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:06:54,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:06:54,014 INFO L175 Difference]: Start difference. First operand has 241 places, 278 transitions, 4104 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:06:54,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 305 transitions, 4848 flow [2024-06-27 21:06:55,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 305 transitions, 4694 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:55,253 INFO L231 Difference]: Finished difference. Result has 246 places, 281 transitions, 4078 flow [2024-06-27 21:06:55,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4078, PETRI_PLACES=246, PETRI_TRANSITIONS=281} [2024-06-27 21:06:55,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 21:06:55,253 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 281 transitions, 4078 flow [2024-06-27 21:06:55,253 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 21:06:55,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:55,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:55,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:06:55,254 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 21:06:55,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1341715878, now seen corresponding path program 3 times [2024-06-27 21:06:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:55,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468156149] [2024-06-27 21:06:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468156149] [2024-06-27 21:06:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468156149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:58,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716575966] [2024-06-27 21:06:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:58,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:58,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 281 transitions, 4078 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 21:06:58,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:58,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:58,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:00,601 INFO L124 PetriNetUnfolderBase]: 5432/8838 cut-off events. [2024-06-27 21:07:00,601 INFO L125 PetriNetUnfolderBase]: For 589010/589013 co-relation queries the response was YES. [2024-06-27 21:07:00,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59751 conditions, 8838 events. 5432/8838 cut-off events. For 589010/589013 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 58971 event pairs, 2274 based on Foata normal form. 6/8840 useless extension candidates. Maximal degree in co-relation 59628. Up to 8261 conditions per place. [2024-06-27 21:07:00,694 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 263 selfloop transitions, 42 changer transitions 0/309 dead transitions. [2024-06-27 21:07:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 309 transitions, 4842 flow [2024-06-27 21:07:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:07:00,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-27 21:07:00,696 INFO L175 Difference]: Start difference. First operand has 246 places, 281 transitions, 4078 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:07:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 309 transitions, 4842 flow [2024-06-27 21:07:01,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 309 transitions, 4744 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:01,661 INFO L231 Difference]: Finished difference. Result has 251 places, 285 transitions, 4150 flow [2024-06-27 21:07:01,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3984, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4150, PETRI_PLACES=251, PETRI_TRANSITIONS=285} [2024-06-27 21:07:01,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 21:07:01,662 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 285 transitions, 4150 flow [2024-06-27 21:07:01,662 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 21:07:01,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:01,662 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 21:07:01,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:07:01,663 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 21:07:01,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1070179506, now seen corresponding path program 1 times [2024-06-27 21:07:01,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:01,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517975685] [2024-06-27 21:07:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:01,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517975685] [2024-06-27 21:07:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517975685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673380463] [2024-06-27 21:07:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:04,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:04,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 285 transitions, 4150 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 21:07:04,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:04,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:04,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:06,111 INFO L124 PetriNetUnfolderBase]: 5434/8836 cut-off events. [2024-06-27 21:07:06,111 INFO L125 PetriNetUnfolderBase]: For 604981/604981 co-relation queries the response was YES. [2024-06-27 21:07:06,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60006 conditions, 8836 events. 5434/8836 cut-off events. For 604981/604981 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 58963 event pairs, 2239 based on Foata normal form. 8/8841 useless extension candidates. Maximal degree in co-relation 59880. Up to 8370 conditions per place. [2024-06-27 21:07:06,218 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 291 selfloop transitions, 18 changer transitions 0/313 dead transitions. [2024-06-27 21:07:06,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 313 transitions, 4998 flow [2024-06-27 21:07:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:07:06,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:07:06,219 INFO L175 Difference]: Start difference. First operand has 251 places, 285 transitions, 4150 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:07:06,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 313 transitions, 4998 flow [2024-06-27 21:07:07,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 313 transitions, 4894 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:07,225 INFO L231 Difference]: Finished difference. Result has 253 places, 286 transitions, 4096 flow [2024-06-27 21:07:07,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4096, PETRI_PLACES=253, PETRI_TRANSITIONS=286} [2024-06-27 21:07:07,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 21:07:07,228 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 286 transitions, 4096 flow [2024-06-27 21:07:07,229 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 21:07:07,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:07,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:07,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:07:07,229 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 21:07:07,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash 590464056, now seen corresponding path program 1 times [2024-06-27 21:07:07,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:07,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156003381] [2024-06-27 21:07:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:07,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156003381] [2024-06-27 21:07:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156003381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:09,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:09,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:09,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734923950] [2024-06-27 21:07:09,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:09,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:09,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:09,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:09,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 286 transitions, 4096 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 21:07:09,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:09,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:09,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:11,479 INFO L124 PetriNetUnfolderBase]: 5416/8810 cut-off events. [2024-06-27 21:07:11,479 INFO L125 PetriNetUnfolderBase]: For 609662/609662 co-relation queries the response was YES. [2024-06-27 21:07:11,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59581 conditions, 8810 events. 5416/8810 cut-off events. For 609662/609662 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 58769 event pairs, 2229 based on Foata normal form. 8/8815 useless extension candidates. Maximal degree in co-relation 59454. Up to 8362 conditions per place. [2024-06-27 21:07:11,584 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 290 selfloop transitions, 18 changer transitions 0/312 dead transitions. [2024-06-27 21:07:11,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 312 transitions, 4814 flow [2024-06-27 21:07:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:07:11,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:07:11,586 INFO L175 Difference]: Start difference. First operand has 253 places, 286 transitions, 4096 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:07:11,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 312 transitions, 4814 flow [2024-06-27 21:07:12,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 312 transitions, 4775 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:12,887 INFO L231 Difference]: Finished difference. Result has 256 places, 286 transitions, 4097 flow [2024-06-27 21:07:12,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4097, PETRI_PLACES=256, PETRI_TRANSITIONS=286} [2024-06-27 21:07:12,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:07:12,888 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 286 transitions, 4097 flow [2024-06-27 21:07:12,888 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 21:07:12,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:12,888 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 21:07:12,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:07:12,888 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 21:07:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1482987743, now seen corresponding path program 1 times [2024-06-27 21:07:12,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:12,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332151466] [2024-06-27 21:07:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:15,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:15,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332151466] [2024-06-27 21:07:15,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332151466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:15,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805887925] [2024-06-27 21:07:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:15,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:15,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:15,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:15,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:15,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 286 transitions, 4097 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 21:07:15,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:18,431 INFO L124 PetriNetUnfolderBase]: 5436/8862 cut-off events. [2024-06-27 21:07:18,432 INFO L125 PetriNetUnfolderBase]: For 603029/603076 co-relation queries the response was YES. [2024-06-27 21:07:18,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59728 conditions, 8862 events. 5436/8862 cut-off events. For 603029/603076 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 59369 event pairs, 2004 based on Foata normal form. 39/8897 useless extension candidates. Maximal degree in co-relation 59600. Up to 7518 conditions per place. [2024-06-27 21:07:18,526 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 147 changer transitions 0/347 dead transitions. [2024-06-27 21:07:18,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 347 transitions, 5213 flow [2024-06-27 21:07:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-27 21:07:18,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:07:18,528 INFO L175 Difference]: Start difference. First operand has 256 places, 286 transitions, 4097 flow. Second operand 12 states and 207 transitions. [2024-06-27 21:07:18,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 347 transitions, 5213 flow [2024-06-27 21:07:19,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 347 transitions, 5166 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:19,639 INFO L231 Difference]: Finished difference. Result has 263 places, 289 transitions, 4386 flow [2024-06-27 21:07:19,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4386, PETRI_PLACES=263, PETRI_TRANSITIONS=289} [2024-06-27 21:07:19,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 21:07:19,639 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 289 transitions, 4386 flow [2024-06-27 21:07:19,640 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 21:07:19,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:19,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:19,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:07:19,640 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 21:07:19,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1829284255, now seen corresponding path program 2 times [2024-06-27 21:07:19,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:19,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706556456] [2024-06-27 21:07:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:22,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:22,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706556456] [2024-06-27 21:07:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706556456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:22,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:22,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:22,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490667371] [2024-06-27 21:07:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:22,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:22,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:22,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 289 transitions, 4386 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 21:07:22,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:22,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:22,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:25,847 INFO L124 PetriNetUnfolderBase]: 5424/8850 cut-off events. [2024-06-27 21:07:25,847 INFO L125 PetriNetUnfolderBase]: For 618018/618065 co-relation queries the response was YES. [2024-06-27 21:07:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60465 conditions, 8850 events. 5424/8850 cut-off events. For 618018/618065 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59278 event pairs, 2004 based on Foata normal form. 39/8885 useless extension candidates. Maximal degree in co-relation 60336. Up to 7510 conditions per place. [2024-06-27 21:07:25,982 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 147 changer transitions 0/346 dead transitions. [2024-06-27 21:07:25,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 346 transitions, 5346 flow [2024-06-27 21:07:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-27 21:07:25,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-27 21:07:25,983 INFO L175 Difference]: Start difference. First operand has 263 places, 289 transitions, 4386 flow. Second operand 12 states and 206 transitions. [2024-06-27 21:07:25,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 346 transitions, 5346 flow [2024-06-27 21:07:27,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 4971 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:27,463 INFO L231 Difference]: Finished difference. Result has 265 places, 289 transitions, 4311 flow [2024-06-27 21:07:27,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4011, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4311, PETRI_PLACES=265, PETRI_TRANSITIONS=289} [2024-06-27 21:07:27,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 21:07:27,463 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 289 transitions, 4311 flow [2024-06-27 21:07:27,464 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 21:07:27,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:27,464 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 21:07:27,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:07:27,464 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 21:07:27,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:27,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1111172091, now seen corresponding path program 3 times [2024-06-27 21:07:27,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:27,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415928705] [2024-06-27 21:07:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:30,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:30,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415928705] [2024-06-27 21:07:30,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415928705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:30,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:30,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:30,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870901391] [2024-06-27 21:07:30,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:30,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:30,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:30,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 289 transitions, 4311 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 21:07:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:30,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:30,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:33,369 INFO L124 PetriNetUnfolderBase]: 5444/8879 cut-off events. [2024-06-27 21:07:33,369 INFO L125 PetriNetUnfolderBase]: For 636225/636270 co-relation queries the response was YES. [2024-06-27 21:07:33,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60741 conditions, 8879 events. 5444/8879 cut-off events. For 636225/636270 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 59381 event pairs, 2006 based on Foata normal form. 28/8902 useless extension candidates. Maximal degree in co-relation 60611. Up to 7526 conditions per place. [2024-06-27 21:07:33,471 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 156 changer transitions 0/333 dead transitions. [2024-06-27 21:07:33,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 333 transitions, 5232 flow [2024-06-27 21:07:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-27 21:07:33,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:07:33,473 INFO L175 Difference]: Start difference. First operand has 265 places, 289 transitions, 4311 flow. Second operand 12 states and 192 transitions. [2024-06-27 21:07:33,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 333 transitions, 5232 flow [2024-06-27 21:07:35,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 333 transitions, 4928 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 21:07:35,022 INFO L231 Difference]: Finished difference. Result has 266 places, 292 transitions, 4368 flow [2024-06-27 21:07:35,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4368, PETRI_PLACES=266, PETRI_TRANSITIONS=292} [2024-06-27 21:07:35,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-27 21:07:35,022 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 292 transitions, 4368 flow [2024-06-27 21:07:35,023 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 21:07:35,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:35,023 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 21:07:35,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:07:35,023 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 21:07:35,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -538198259, now seen corresponding path program 4 times [2024-06-27 21:07:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128913995] [2024-06-27 21:07:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:37,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:37,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128913995] [2024-06-27 21:07:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128913995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537653883] [2024-06-27 21:07:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:37,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:37,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 292 transitions, 4368 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 21:07:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:37,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:37,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:40,920 INFO L124 PetriNetUnfolderBase]: 5432/8863 cut-off events. [2024-06-27 21:07:40,920 INFO L125 PetriNetUnfolderBase]: For 629044/629089 co-relation queries the response was YES. [2024-06-27 21:07:41,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60408 conditions, 8863 events. 5432/8863 cut-off events. For 629044/629089 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 59349 event pairs, 2004 based on Foata normal form. 28/8886 useless extension candidates. Maximal degree in co-relation 60277. Up to 7518 conditions per place. [2024-06-27 21:07:41,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 156 changer transitions 0/332 dead transitions. [2024-06-27 21:07:41,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 332 transitions, 5122 flow [2024-06-27 21:07:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:07:41,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2024-06-27 21:07:41,036 INFO L175 Difference]: Start difference. First operand has 266 places, 292 transitions, 4368 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:07:41,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 332 transitions, 5122 flow [2024-06-27 21:07:42,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 332 transitions, 4758 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:42,543 INFO L231 Difference]: Finished difference. Result has 268 places, 292 transitions, 4322 flow [2024-06-27 21:07:42,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4322, PETRI_PLACES=268, PETRI_TRANSITIONS=292} [2024-06-27 21:07:42,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:07:42,544 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 292 transitions, 4322 flow [2024-06-27 21:07:42,546 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 21:07:42,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:42,546 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 21:07:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:07:42,546 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 21:07:42,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1295435607, now seen corresponding path program 5 times [2024-06-27 21:07:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:42,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31557148] [2024-06-27 21:07:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:45,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31557148] [2024-06-27 21:07:45,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31557148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:45,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:45,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:45,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511226728] [2024-06-27 21:07:45,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:45,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:45,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:45,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:45,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 4322 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 21:07:45,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:45,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:45,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:48,336 INFO L124 PetriNetUnfolderBase]: 5420/8833 cut-off events. [2024-06-27 21:07:48,336 INFO L125 PetriNetUnfolderBase]: For 639022/639044 co-relation queries the response was YES. [2024-06-27 21:07:48,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60229 conditions, 8833 events. 5420/8833 cut-off events. For 639022/639044 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 59164 event pairs, 2087 based on Foata normal form. 6/8834 useless extension candidates. Maximal degree in co-relation 60097. Up to 7407 conditions per place. [2024-06-27 21:07:48,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 145 changer transitions 0/322 dead transitions. [2024-06-27 21:07:48,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 322 transitions, 5028 flow [2024-06-27 21:07:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-27 21:07:48,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-27 21:07:48,440 INFO L175 Difference]: Start difference. First operand has 268 places, 292 transitions, 4322 flow. Second operand 11 states and 169 transitions. [2024-06-27 21:07:48,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 322 transitions, 5028 flow [2024-06-27 21:07:49,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 322 transitions, 4716 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:07:49,776 INFO L231 Difference]: Finished difference. Result has 268 places, 292 transitions, 4306 flow [2024-06-27 21:07:49,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4306, PETRI_PLACES=268, PETRI_TRANSITIONS=292} [2024-06-27 21:07:49,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:07:49,777 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 292 transitions, 4306 flow [2024-06-27 21:07:49,777 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 21:07:49,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:49,777 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, 1, 1] [2024-06-27 21:07:49,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:07:49,778 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 21:07:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash -359449441, now seen corresponding path program 1 times [2024-06-27 21:07:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:49,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513466735] [2024-06-27 21:07:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:49,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513466735] [2024-06-27 21:07:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513466735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:52,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:52,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279016258] [2024-06-27 21:07:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:52,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:52,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 4306 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:56,384 INFO L124 PetriNetUnfolderBase]: 8262/13447 cut-off events. [2024-06-27 21:07:56,384 INFO L125 PetriNetUnfolderBase]: For 1094556/1094576 co-relation queries the response was YES. [2024-06-27 21:07:56,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92120 conditions, 13447 events. 8262/13447 cut-off events. For 1094556/1094576 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 96781 event pairs, 3320 based on Foata normal form. 49/13492 useless extension candidates. Maximal degree in co-relation 91987. Up to 8135 conditions per place. [2024-06-27 21:07:56,521 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 292 selfloop transitions, 171 changer transitions 15/482 dead transitions. [2024-06-27 21:07:56,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 482 transitions, 7736 flow [2024-06-27 21:07:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:07:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:07:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 244 transitions. [2024-06-27 21:07:56,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:07:56,523 INFO L175 Difference]: Start difference. First operand has 268 places, 292 transitions, 4306 flow. Second operand 14 states and 244 transitions. [2024-06-27 21:07:56,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 482 transitions, 7736 flow [2024-06-27 21:07:58,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 482 transitions, 7161 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:58,193 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5821 flow [2024-06-27 21:07:58,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5821, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2024-06-27 21:07:58,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:07:58,194 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5821 flow [2024-06-27 21:07:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:58,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:58,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:07:58,194 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 21:07:58,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 835016413, now seen corresponding path program 2 times [2024-06-27 21:07:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:58,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934840986] [2024-06-27 21:07:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:01,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934840986] [2024-06-27 21:08:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934840986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:01,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:01,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874077335] [2024-06-27 21:08:01,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:01,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:01,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:01,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5821 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 21:08:01,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:01,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:04,906 INFO L124 PetriNetUnfolderBase]: 8032/13082 cut-off events. [2024-06-27 21:08:04,906 INFO L125 PetriNetUnfolderBase]: For 1060339/1060356 co-relation queries the response was YES. [2024-06-27 21:08:05,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90303 conditions, 13082 events. 8032/13082 cut-off events. For 1060339/1060356 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 93772 event pairs, 2814 based on Foata normal form. 51/13131 useless extension candidates. Maximal degree in co-relation 90164. Up to 7679 conditions per place. [2024-06-27 21:08:05,061 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 207 changer transitions 17/446 dead transitions. [2024-06-27 21:08:05,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 446 transitions, 7297 flow [2024-06-27 21:08:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 21:08:05,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:08:05,062 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5821 flow. Second operand 11 states and 209 transitions. [2024-06-27 21:08:05,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 446 transitions, 7297 flow [2024-06-27 21:08:07,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 446 transitions, 7210 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:07,024 INFO L231 Difference]: Finished difference. Result has 284 places, 367 transitions, 6117 flow [2024-06-27 21:08:07,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5740, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6117, PETRI_PLACES=284, PETRI_TRANSITIONS=367} [2024-06-27 21:08:07,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 21:08:07,025 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 367 transitions, 6117 flow [2024-06-27 21:08:07,025 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 21:08:07,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:07,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:07,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:08:07,025 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 21:08:07,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 454657667, now seen corresponding path program 3 times [2024-06-27 21:08:07,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:07,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867456563] [2024-06-27 21:08:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:10,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867456563] [2024-06-27 21:08:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867456563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:10,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000028801] [2024-06-27 21:08:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:10,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:10,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 367 transitions, 6117 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 21:08:10,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:10,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:10,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:14,228 INFO L124 PetriNetUnfolderBase]: 9376/15182 cut-off events. [2024-06-27 21:08:14,228 INFO L125 PetriNetUnfolderBase]: For 1615477/1615494 co-relation queries the response was YES. [2024-06-27 21:08:14,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117588 conditions, 15182 events. 9376/15182 cut-off events. For 1615477/1615494 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 110499 event pairs, 2648 based on Foata normal form. 27/15207 useless extension candidates. Maximal degree in co-relation 117448. Up to 8281 conditions per place. [2024-06-27 21:08:14,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 212 changer transitions 17/438 dead transitions. [2024-06-27 21:08:14,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 438 transitions, 7589 flow [2024-06-27 21:08:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 21:08:14,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-27 21:08:14,430 INFO L175 Difference]: Start difference. First operand has 284 places, 367 transitions, 6117 flow. Second operand 11 states and 202 transitions. [2024-06-27 21:08:14,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 438 transitions, 7589 flow [2024-06-27 21:08:16,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 438 transitions, 7160 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:16,837 INFO L231 Difference]: Finished difference. Result has 284 places, 362 transitions, 6059 flow [2024-06-27 21:08:16,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5700, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6059, PETRI_PLACES=284, PETRI_TRANSITIONS=362} [2024-06-27 21:08:16,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 21:08:16,838 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 362 transitions, 6059 flow [2024-06-27 21:08:16,838 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 21:08:16,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:16,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:16,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:08:16,838 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 21:08:16,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash -714412323, now seen corresponding path program 4 times [2024-06-27 21:08:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:16,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009156972] [2024-06-27 21:08:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:16,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:19,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:19,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009156972] [2024-06-27 21:08:19,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009156972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:19,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:19,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:19,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520928344] [2024-06-27 21:08:19,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:19,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:19,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:19,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:19,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 362 transitions, 6059 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 21:08:19,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:19,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:19,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:24,638 INFO L124 PetriNetUnfolderBase]: 9024/14638 cut-off events. [2024-06-27 21:08:24,639 INFO L125 PetriNetUnfolderBase]: For 1541399/1541416 co-relation queries the response was YES. [2024-06-27 21:08:24,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109044 conditions, 14638 events. 9024/14638 cut-off events. For 1541399/1541416 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 106801 event pairs, 4139 based on Foata normal form. 107/14743 useless extension candidates. Maximal degree in co-relation 108904. Up to 10441 conditions per place. [2024-06-27 21:08:24,882 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 192 changer transitions 27/434 dead transitions. [2024-06-27 21:08:24,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 434 transitions, 7351 flow [2024-06-27 21:08:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:08:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:08:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-27 21:08:24,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-27 21:08:24,884 INFO L175 Difference]: Start difference. First operand has 284 places, 362 transitions, 6059 flow. Second operand 12 states and 215 transitions. [2024-06-27 21:08:24,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 434 transitions, 7351 flow [2024-06-27 21:08:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 434 transitions, 6915 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-27 21:08:27,264 INFO L231 Difference]: Finished difference. Result has 280 places, 348 transitions, 5822 flow [2024-06-27 21:08:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5822, PETRI_PLACES=280, PETRI_TRANSITIONS=348} [2024-06-27 21:08:27,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-27 21:08:27,265 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 348 transitions, 5822 flow [2024-06-27 21:08:27,265 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 21:08:27,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:27,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:08:27,265 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 21:08:27,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash -705841443, now seen corresponding path program 5 times [2024-06-27 21:08:27,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:27,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139832824] [2024-06-27 21:08:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:27,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139832824] [2024-06-27 21:08:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139832824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:30,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709484883] [2024-06-27 21:08:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:30,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:30,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 348 transitions, 5822 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 21:08:30,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:30,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:30,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:34,633 INFO L124 PetriNetUnfolderBase]: 8244/13418 cut-off events. [2024-06-27 21:08:34,633 INFO L125 PetriNetUnfolderBase]: For 1342898/1342915 co-relation queries the response was YES. [2024-06-27 21:08:34,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97777 conditions, 13418 events. 8244/13418 cut-off events. For 1342898/1342915 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 97079 event pairs, 4073 based on Foata normal form. 119/13535 useless extension candidates. Maximal degree in co-relation 97641. Up to 11261 conditions per place. [2024-06-27 21:08:34,795 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 176 changer transitions 42/410 dead transitions. [2024-06-27 21:08:34,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 410 transitions, 6888 flow [2024-06-27 21:08:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:08:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:08:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-27 21:08:34,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2024-06-27 21:08:34,797 INFO L175 Difference]: Start difference. First operand has 280 places, 348 transitions, 5822 flow. Second operand 12 states and 203 transitions. [2024-06-27 21:08:34,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 410 transitions, 6888 flow [2024-06-27 21:08:36,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 410 transitions, 6509 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 21:08:36,685 INFO L231 Difference]: Finished difference. Result has 277 places, 331 transitions, 5589 flow [2024-06-27 21:08:36,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5589, PETRI_PLACES=277, PETRI_TRANSITIONS=331} [2024-06-27 21:08:36,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 21:08:36,685 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 331 transitions, 5589 flow [2024-06-27 21:08:36,685 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 21:08:36,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:36,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:36,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:08:36,686 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 21:08:36,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 490268381, now seen corresponding path program 6 times [2024-06-27 21:08:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:36,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637145740] [2024-06-27 21:08:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637145740] [2024-06-27 21:08:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637145740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871582359] [2024-06-27 21:08:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:39,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:39,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 331 transitions, 5589 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 21:08:39,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:39,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:39,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:43,357 INFO L124 PetriNetUnfolderBase]: 7728/12572 cut-off events. [2024-06-27 21:08:43,357 INFO L125 PetriNetUnfolderBase]: For 1081935/1081952 co-relation queries the response was YES. [2024-06-27 21:08:43,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92295 conditions, 12572 events. 7728/12572 cut-off events. For 1081935/1081952 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 89833 event pairs, 3896 based on Foata normal form. 31/12601 useless extension candidates. Maximal degree in co-relation 92161. Up to 11072 conditions per place. [2024-06-27 21:08:43,494 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 172 changer transitions 16/378 dead transitions. [2024-06-27 21:08:43,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 378 transitions, 6521 flow [2024-06-27 21:08:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 21:08:43,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-27 21:08:43,496 INFO L175 Difference]: Start difference. First operand has 277 places, 331 transitions, 5589 flow. Second operand 11 states and 180 transitions. [2024-06-27 21:08:43,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 378 transitions, 6521 flow [2024-06-27 21:08:45,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 378 transitions, 6128 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-27 21:08:45,586 INFO L231 Difference]: Finished difference. Result has 269 places, 324 transitions, 5448 flow [2024-06-27 21:08:45,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5448, PETRI_PLACES=269, PETRI_TRANSITIONS=324} [2024-06-27 21:08:45,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 21:08:45,587 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 324 transitions, 5448 flow [2024-06-27 21:08:45,587 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 21:08:45,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:45,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:45,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:08:45,588 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 21:08:45,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash 487411421, now seen corresponding path program 7 times [2024-06-27 21:08:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:45,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335776087] [2024-06-27 21:08:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:45,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:48,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:48,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335776087] [2024-06-27 21:08:48,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335776087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:48,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:48,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:48,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782679149] [2024-06-27 21:08:48,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:48,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:48,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:48,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:48,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 324 transitions, 5448 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 21:08:48,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:48,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:48,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:52,482 INFO L124 PetriNetUnfolderBase]: 8055/13061 cut-off events. [2024-06-27 21:08:52,482 INFO L125 PetriNetUnfolderBase]: For 1144430/1144447 co-relation queries the response was YES. [2024-06-27 21:08:52,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98036 conditions, 13061 events. 8055/13061 cut-off events. For 1144430/1144447 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 93206 event pairs, 3671 based on Foata normal form. 31/13090 useless extension candidates. Maximal degree in co-relation 97905. Up to 9649 conditions per place. [2024-06-27 21:08:52,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 161 changer transitions 26/381 dead transitions. [2024-06-27 21:08:52,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 381 transitions, 6588 flow [2024-06-27 21:08:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 21:08:52,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:08:52,630 INFO L175 Difference]: Start difference. First operand has 269 places, 324 transitions, 5448 flow. Second operand 11 states and 187 transitions. [2024-06-27 21:08:52,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 381 transitions, 6588 flow [2024-06-27 21:08:54,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 381 transitions, 6234 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:54,573 INFO L231 Difference]: Finished difference. Result has 268 places, 310 transitions, 5166 flow [2024-06-27 21:08:54,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5166, PETRI_PLACES=268, PETRI_TRANSITIONS=310} [2024-06-27 21:08:54,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:08:54,574 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 310 transitions, 5166 flow [2024-06-27 21:08:54,574 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 21:08:54,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:54,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:54,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:08:54,575 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 21:08:54,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1974820315, now seen corresponding path program 8 times [2024-06-27 21:08:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:54,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750370527] [2024-06-27 21:08:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:54,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750370527] [2024-06-27 21:08:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750370527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:58,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825851999] [2024-06-27 21:08:58,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:58,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:58,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:58,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:58,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 310 transitions, 5166 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 21:08:58,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:58,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:58,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand