./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_rmo.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/mutex-meet-nonrel/safe000_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe000_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:48:57,348 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:48:57,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:48:57,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:48:57,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:48:57,398 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:48:57,398 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:48:57,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:48:57,399 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:48:57,399 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:48:57,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:48:57,400 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:48:57,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:48:57,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:48:57,401 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:48:57,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:48:57,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:48:57,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:48:57,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:48:57,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:48:57,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:48:57,416 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:48:57,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:48:57,417 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:48:57,417 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:48:57,417 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:48:57,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:48:57,418 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:48:57,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:48:57,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:48:57,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:48:57,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:48:57,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:48:57,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:48:57,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:48:57,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:48:57,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:48:57,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:48:57,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:48:57,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:48:57,424 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:48:57,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:48:57,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:48:57,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:48:57,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:48:57,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:48:57,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:48:57,631 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:48:57,632 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:48:57,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe000_rmo.yml/witness.yml [2024-06-28 03:48:57,870 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:48:57,870 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:48:57,871 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_rmo.i [2024-06-28 03:48:58,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:48:59,122 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:48:59,122 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_rmo.i [2024-06-28 03:48:59,133 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a884b0886/0decae864e3e4cc5b43ed7d78c0d91c5/FLAG807ea18b9 [2024-06-28 03:48:59,146 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a884b0886/0decae864e3e4cc5b43ed7d78c0d91c5 [2024-06-28 03:48:59,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:48:59,148 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:48:59,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:48:59,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:48:59,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:48:59,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:48:57" (1/2) ... [2024-06-28 03:48:59,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d351a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:48:59, skipping insertion in model container [2024-06-28 03:48:59,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:48:57" (1/2) ... [2024-06-28 03:48:59,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79857931 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:48:59, skipping insertion in model container [2024-06-28 03:48:59,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:48:59" (2/2) ... [2024-06-28 03:48:59,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d351a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59, skipping insertion in model container [2024-06-28 03:48:59,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:48:59" (2/2) ... [2024-06-28 03:48:59,164 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:48:59,291 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:48:59,292 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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$read_delayed_var == 2)))) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:48:59,293 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$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)))) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:48:59,293 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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$read_delayed_var == 2)))) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:48:59,293 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:48:59,293 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-28 03:48:59,331 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:48:59,681 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:48:59,689 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:48:59,829 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:48:59,857 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:48:59,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59 WrapperNode [2024-06-28 03:48:59,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:48:59,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:48:59,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:48:59,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:48:59,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,929 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-28 03:48:59,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:48:59,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:48:59,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:48:59,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:48:59,938 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,943 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,962 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 03:48:59,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:48:59,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:49:00,000 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:49:00,004 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:49:00,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:49:00,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:49:00,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:49:00,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:49:00,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (1/1) ... [2024-06-28 03:49:00,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:49:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:49:00,114 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) [2024-06-28 03:49:00,130 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 [2024-06-28 03:49:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:49:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:49:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:49:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:49:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:49:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:49:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:49:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:49:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:49:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:49:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:49:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:49:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:49:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:49:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:49:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:49:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:49:00,158 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:49:00,295 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:49:00,297 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:49:00,790 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:49:00,791 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:49:01,197 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:49:01,197 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:49:01,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:49:01 BoogieIcfgContainer [2024-06-28 03:49:01,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:49:01,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:49:01,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:49:01,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:49:01,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:48:57" (1/4) ... [2024-06-28 03:49:01,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165ae707 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:49:01, skipping insertion in model container [2024-06-28 03:49:01,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:48:59" (2/4) ... [2024-06-28 03:49:01,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165ae707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:49:01, skipping insertion in model container [2024-06-28 03:49:01,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:48:59" (3/4) ... [2024-06-28 03:49:01,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165ae707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:49:01, skipping insertion in model container [2024-06-28 03:49:01,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:49:01" (4/4) ... [2024-06-28 03:49:01,206 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_rmo.i [2024-06-28 03:49:01,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:49:01,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:49:01,219 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:49:01,288 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:49:01,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:49:01,348 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:49:01,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:49:01,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:49:01,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:49:01,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:49:01,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:49:01,368 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;@d4607e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:49:01,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:49:01,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:49:01,372 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:49:01,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:49:01,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:01,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:49:01,373 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)] === [2024-06-28 03:49:01,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash 906645505, now seen corresponding path program 1 times [2024-06-28 03:49:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371747113] [2024-06-28 03:49:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:03,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371747113] [2024-06-28 03:49:03,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371747113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:03,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:03,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:49:03,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481175133] [2024-06-28 03:49:03,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:03,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:49:03,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:49:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:49:03,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:49:03,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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) [2024-06-28 03:49:03,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:03,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:49:03,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:03,598 INFO L124 PetriNetUnfolderBase]: 1157/1772 cut-off events. [2024-06-28 03:49:03,598 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 03:49:03,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1772 events. 1157/1772 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8383 event pairs, 709 based on Foata normal form. 2/1743 useless extension candidates. Maximal degree in co-relation 3581. Up to 1741 conditions per place. [2024-06-28 03:49:03,610 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 03:49:03,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-28 03:49:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:49:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:49:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-28 03:49:03,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 03:49:03,620 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-28 03:49:03,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-28 03:49:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:49:03,624 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:49:03,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:49:03,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:49:03,628 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:49:03,628 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) [2024-06-28 03:49:03,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:03,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:03,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:49:03,628 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)] === [2024-06-28 03:49:03,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash -591977984, now seen corresponding path program 1 times [2024-06-28 03:49:03,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:03,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655194839] [2024-06-28 03:49:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:05,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:05,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655194839] [2024-06-28 03:49:05,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655194839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:05,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:05,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:49:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322755097] [2024-06-28 03:49:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:49:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:49:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:49:05,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:49:05,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-06-28 03:49:05,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:05,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:49:05,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:06,116 INFO L124 PetriNetUnfolderBase]: 1148/1758 cut-off events. [2024-06-28 03:49:06,117 INFO L125 PetriNetUnfolderBase]: For 327/330 co-relation queries the response was YES. [2024-06-28 03:49:06,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1758 events. 1148/1758 cut-off events. For 327/330 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8346 event pairs, 585 based on Foata normal form. 6/1762 useless extension candidates. Maximal degree in co-relation 4046. Up to 1704 conditions per place. [2024-06-28 03:49:06,127 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 03:49:06,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-28 03:49:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:49:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:49:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 03:49:06,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 03:49:06,129 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-28 03:49:06,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-28 03:49:06,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:49:06,130 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:49:06,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:49:06,131 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:49:06,132 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:49:06,132 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) [2024-06-28 03:49:06,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:06,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:49:06,133 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)] === [2024-06-28 03:49:06,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1171446609, now seen corresponding path program 1 times [2024-06-28 03:49:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:06,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779457560] [2024-06-28 03:49:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:08,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779457560] [2024-06-28 03:49:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779457560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:08,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:08,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:49:08,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636496069] [2024-06-28 03:49:08,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:08,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:49:08,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:49:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:49:08,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:08,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:08,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:08,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:08,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:09,180 INFO L124 PetriNetUnfolderBase]: 1375/2089 cut-off events. [2024-06-28 03:49:09,180 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2024-06-28 03:49:09,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5347 conditions, 2089 events. 1375/2089 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9835 event pairs, 547 based on Foata normal form. 4/2092 useless extension candidates. Maximal degree in co-relation 5333. Up to 2012 conditions per place. [2024-06-28 03:49:09,189 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-28 03:49:09,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 395 flow [2024-06-28 03:49:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:49:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:49:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 03:49:09,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 03:49:09,191 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 110 transitions. [2024-06-28 03:49:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 395 flow [2024-06-28 03:49:09,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 374 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 03:49:09,193 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 208 flow [2024-06-28 03:49:09,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-28 03:49:09,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 03:49:09,194 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 208 flow [2024-06-28 03:49:09,194 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) [2024-06-28 03:49:09,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:09,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:49:09,195 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)] === [2024-06-28 03:49:09,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1342335620, now seen corresponding path program 1 times [2024-06-28 03:49:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093304906] [2024-06-28 03:49:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093304906] [2024-06-28 03:49:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093304906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:11,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:11,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:49:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142442247] [2024-06-28 03:49:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:49:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:49:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:49:11,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:11,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 208 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) [2024-06-28 03:49:11,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:11,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:11,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:12,518 INFO L124 PetriNetUnfolderBase]: 1361/2067 cut-off events. [2024-06-28 03:49:12,518 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2024-06-28 03:49:12,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2067 events. 1361/2067 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9727 event pairs, 384 based on Foata normal form. 8/2074 useless extension candidates. Maximal degree in co-relation 5830. Up to 1942 conditions per place. [2024-06-28 03:49:12,529 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-28 03:49:12,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 462 flow [2024-06-28 03:49:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:49:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:49:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 03:49:12,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:49:12,531 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 208 flow. Second operand 6 states and 126 transitions. [2024-06-28 03:49:12,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 462 flow [2024-06-28 03:49:12,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 458 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 03:49:12,533 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-28 03:49:12,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-28 03:49:12,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-28 03:49:12,534 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-28 03:49:12,534 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) [2024-06-28 03:49:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:49:12,535 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)] === [2024-06-28 03:49:12,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash -664706290, now seen corresponding path program 1 times [2024-06-28 03:49:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:12,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75954625] [2024-06-28 03:49:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:14,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:14,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75954625] [2024-06-28 03:49:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75954625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:14,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:49:14,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963369900] [2024-06-28 03:49:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:14,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:49:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:49:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:49:14,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:14,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 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) [2024-06-28 03:49:14,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:14,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:14,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:15,125 INFO L124 PetriNetUnfolderBase]: 1351/2052 cut-off events. [2024-06-28 03:49:15,125 INFO L125 PetriNetUnfolderBase]: For 2816/2816 co-relation queries the response was YES. [2024-06-28 03:49:15,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 2052 events. 1351/2052 cut-off events. For 2816/2816 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9481 event pairs, 554 based on Foata normal form. 4/2055 useless extension candidates. Maximal degree in co-relation 6201. Up to 1994 conditions per place. [2024-06-28 03:49:15,138 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-28 03:49:15,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 456 flow [2024-06-28 03:49:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:49:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:49:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 03:49:15,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:49:15,142 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 5 states and 87 transitions. [2024-06-28 03:49:15,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 456 flow [2024-06-28 03:49:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 423 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:15,150 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 289 flow [2024-06-28 03:49:15,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-28 03:49:15,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-28 03:49:15,153 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 289 flow [2024-06-28 03:49:15,153 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) [2024-06-28 03:49:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:15,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:49:15,154 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)] === [2024-06-28 03:49:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -726036975, now seen corresponding path program 1 times [2024-06-28 03:49:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:15,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114820851] [2024-06-28 03:49:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:18,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:18,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114820851] [2024-06-28 03:49:18,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114820851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:18,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:18,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204538601] [2024-06-28 03:49:18,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:18,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:18,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:18,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:18,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 289 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) [2024-06-28 03:49:18,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:18,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:18,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:19,315 INFO L124 PetriNetUnfolderBase]: 1369/2088 cut-off events. [2024-06-28 03:49:19,315 INFO L125 PetriNetUnfolderBase]: For 3831/3833 co-relation queries the response was YES. [2024-06-28 03:49:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6788 conditions, 2088 events. 1369/2088 cut-off events. For 3831/3833 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9813 event pairs, 494 based on Foata normal form. 5/2092 useless extension candidates. Maximal degree in co-relation 6764. Up to 1926 conditions per place. [2024-06-28 03:49:19,324 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-28 03:49:19,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 633 flow [2024-06-28 03:49:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:49:19,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 03:49:19,326 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 289 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:49:19,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 633 flow [2024-06-28 03:49:19,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 629 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 03:49:19,329 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 387 flow [2024-06-28 03:49:19,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-28 03:49:19,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 03:49:19,330 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 387 flow [2024-06-28 03:49:19,330 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) [2024-06-28 03:49:19,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:19,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:49:19,331 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)] === [2024-06-28 03:49:19,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -725917005, now seen corresponding path program 2 times [2024-06-28 03:49:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:19,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978621704] [2024-06-28 03:49:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:22,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:22,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978621704] [2024-06-28 03:49:22,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978621704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:22,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:22,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785254819] [2024-06-28 03:49:22,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:22,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:22,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:22,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 387 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) [2024-06-28 03:49:22,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:22,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:22,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:23,650 INFO L124 PetriNetUnfolderBase]: 1405/2148 cut-off events. [2024-06-28 03:49:23,650 INFO L125 PetriNetUnfolderBase]: For 5615/5617 co-relation queries the response was YES. [2024-06-28 03:49:23,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7591 conditions, 2148 events. 1405/2148 cut-off events. For 5615/5617 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10195 event pairs, 492 based on Foata normal form. 5/2152 useless extension candidates. Maximal degree in co-relation 7564. Up to 2014 conditions per place. [2024-06-28 03:49:23,667 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2024-06-28 03:49:23,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 705 flow [2024-06-28 03:49:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:49:23,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:49:23,707 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 387 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:49:23,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 705 flow [2024-06-28 03:49:23,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 668 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:49:23,714 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 456 flow [2024-06-28 03:49:23,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=7, PETRI_FLOW=456, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-28 03:49:23,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 03:49:23,715 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 456 flow [2024-06-28 03:49:23,715 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) [2024-06-28 03:49:23,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:23,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:49:23,715 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)] === [2024-06-28 03:49:23,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -555214389, now seen corresponding path program 1 times [2024-06-28 03:49:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:23,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612487025] [2024-06-28 03:49:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:26,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:26,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612487025] [2024-06-28 03:49:26,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612487025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:26,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:26,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632638451] [2024-06-28 03:49:26,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:26,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 456 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) [2024-06-28 03:49:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:26,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:26,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:27,306 INFO L124 PetriNetUnfolderBase]: 1633/2468 cut-off events. [2024-06-28 03:49:27,307 INFO L125 PetriNetUnfolderBase]: For 7646/7648 co-relation queries the response was YES. [2024-06-28 03:49:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8902 conditions, 2468 events. 1633/2468 cut-off events. For 7646/7648 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11710 event pairs, 510 based on Foata normal form. 12/2479 useless extension candidates. Maximal degree in co-relation 8873. Up to 2174 conditions per place. [2024-06-28 03:49:27,327 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 92 selfloop transitions, 33 changer transitions 0/129 dead transitions. [2024-06-28 03:49:27,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 129 transitions, 940 flow [2024-06-28 03:49:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:49:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:49:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:49:27,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:49:27,331 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 456 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:49:27,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 129 transitions, 940 flow [2024-06-28 03:49:27,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 884 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:27,340 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 572 flow [2024-06-28 03:49:27,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=572, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-28 03:49:27,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-28 03:49:27,343 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 572 flow [2024-06-28 03:49:27,343 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) [2024-06-28 03:49:27,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:27,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:27,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:49:27,344 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)] === [2024-06-28 03:49:27,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1666118313, now seen corresponding path program 2 times [2024-06-28 03:49:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546995094] [2024-06-28 03:49:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:27,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:29,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546995094] [2024-06-28 03:49:29,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546995094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:29,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:29,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:29,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674894537] [2024-06-28 03:49:29,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:29,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:29,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 572 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) [2024-06-28 03:49:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:30,658 INFO L124 PetriNetUnfolderBase]: 1623/2452 cut-off events. [2024-06-28 03:49:30,658 INFO L125 PetriNetUnfolderBase]: For 10221/10231 co-relation queries the response was YES. [2024-06-28 03:49:30,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10041 conditions, 2452 events. 1623/2452 cut-off events. For 10221/10231 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11495 event pairs, 553 based on Foata normal form. 14/2465 useless extension candidates. Maximal degree in co-relation 10009. Up to 2259 conditions per place. [2024-06-28 03:49:30,672 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-28 03:49:30,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 120 transitions, 1005 flow [2024-06-28 03:49:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:49:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:49:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:49:30,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 03:49:30,675 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 572 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:49:30,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 120 transitions, 1005 flow [2024-06-28 03:49:30,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 947 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:30,688 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 714 flow [2024-06-28 03:49:30,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-28 03:49:30,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-28 03:49:30,689 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 714 flow [2024-06-28 03:49:30,689 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) [2024-06-28 03:49:30,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:30,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:30,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:49:30,690 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)] === [2024-06-28 03:49:30,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash 319867009, now seen corresponding path program 3 times [2024-06-28 03:49:30,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:30,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094458897] [2024-06-28 03:49:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:30,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:33,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:33,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094458897] [2024-06-28 03:49:33,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094458897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:33,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691791467] [2024-06-28 03:49:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:33,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:33,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:33,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:33,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 714 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) [2024-06-28 03:49:33,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:33,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:33,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:34,495 INFO L124 PetriNetUnfolderBase]: 1615/2437 cut-off events. [2024-06-28 03:49:34,496 INFO L125 PetriNetUnfolderBase]: For 12461/12463 co-relation queries the response was YES. [2024-06-28 03:49:34,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10681 conditions, 2437 events. 1615/2437 cut-off events. For 12461/12463 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11449 event pairs, 527 based on Foata normal form. 5/2441 useless extension candidates. Maximal degree in co-relation 10645. Up to 2269 conditions per place. [2024-06-28 03:49:34,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 32 changer transitions 0/123 dead transitions. [2024-06-28 03:49:34,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 1028 flow [2024-06-28 03:49:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:49:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:49:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 03:49:34,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:49:34,522 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 714 flow. Second operand 6 states and 114 transitions. [2024-06-28 03:49:34,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 123 transitions, 1028 flow [2024-06-28 03:49:34,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 994 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 03:49:34,541 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 765 flow [2024-06-28 03:49:34,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-28 03:49:34,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 03:49:34,542 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 765 flow [2024-06-28 03:49:34,543 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) [2024-06-28 03:49:34,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:34,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:34,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:49:34,543 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)] === [2024-06-28 03:49:34,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1665881163, now seen corresponding path program 3 times [2024-06-28 03:49:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085937419] [2024-06-28 03:49:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085937419] [2024-06-28 03:49:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085937419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:37,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:37,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461200731] [2024-06-28 03:49:37,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:37,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:37,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:37,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 765 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) [2024-06-28 03:49:37,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:37,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:37,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:38,086 INFO L124 PetriNetUnfolderBase]: 1627/2455 cut-off events. [2024-06-28 03:49:38,087 INFO L125 PetriNetUnfolderBase]: For 14273/14275 co-relation queries the response was YES. [2024-06-28 03:49:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 2455 events. 1627/2455 cut-off events. For 14273/14275 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11491 event pairs, 557 based on Foata normal form. 12/2466 useless extension candidates. Maximal degree in co-relation 10891. Up to 2162 conditions per place. [2024-06-28 03:49:38,102 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-28 03:49:38,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 1150 flow [2024-06-28 03:49:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:49:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 03:49:38,104 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 765 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:49:38,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 1150 flow [2024-06-28 03:49:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 1078 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:38,118 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 873 flow [2024-06-28 03:49:38,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=873, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-28 03:49:38,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-28 03:49:38,119 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 873 flow [2024-06-28 03:49:38,119 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) [2024-06-28 03:49:38,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:38,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:49:38,119 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)] === [2024-06-28 03:49:38,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1666127241, now seen corresponding path program 1 times [2024-06-28 03:49:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:38,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309207004] [2024-06-28 03:49:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:38,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:40,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309207004] [2024-06-28 03:49:40,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309207004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:40,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:40,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591939653] [2024-06-28 03:49:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:40,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:40,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:40,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:40,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 873 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) [2024-06-28 03:49:40,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:40,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:40,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:41,797 INFO L124 PetriNetUnfolderBase]: 1619/2443 cut-off events. [2024-06-28 03:49:41,797 INFO L125 PetriNetUnfolderBase]: For 14529/14531 co-relation queries the response was YES. [2024-06-28 03:49:41,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11330 conditions, 2443 events. 1619/2443 cut-off events. For 14529/14531 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11307 event pairs, 532 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 11289. Up to 2351 conditions per place. [2024-06-28 03:49:41,809 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-28 03:49:41,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1182 flow [2024-06-28 03:49:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:49:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:49:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-28 03:49:41,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:49:41,811 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 873 flow. Second operand 6 states and 102 transitions. [2024-06-28 03:49:41,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1182 flow [2024-06-28 03:49:41,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1101 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:41,825 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 839 flow [2024-06-28 03:49:41,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-28 03:49:41,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 03:49:41,826 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 839 flow [2024-06-28 03:49:41,826 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) [2024-06-28 03:49:41,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:41,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:41,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:49:41,827 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)] === [2024-06-28 03:49:41,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1036332048, now seen corresponding path program 1 times [2024-06-28 03:49:41,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895511587] [2024-06-28 03:49:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895511587] [2024-06-28 03:49:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895511587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:45,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:45,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878313138] [2024-06-28 03:49:45,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:45,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:45,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:45,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 839 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) [2024-06-28 03:49:45,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:45,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:45,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:46,492 INFO L124 PetriNetUnfolderBase]: 1847/2783 cut-off events. [2024-06-28 03:49:46,493 INFO L125 PetriNetUnfolderBase]: For 18274/18276 co-relation queries the response was YES. [2024-06-28 03:49:46,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2783 events. 1847/2783 cut-off events. For 18274/18276 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13286 event pairs, 547 based on Foata normal form. 12/2794 useless extension candidates. Maximal degree in co-relation 12680. Up to 2114 conditions per place. [2024-06-28 03:49:46,509 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-28 03:49:46,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 1573 flow [2024-06-28 03:49:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:49:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:49:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-28 03:49:46,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:49:46,511 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 839 flow. Second operand 11 states and 209 transitions. [2024-06-28 03:49:46,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 1573 flow [2024-06-28 03:49:46,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 180 transitions, 1544 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:46,527 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1102 flow [2024-06-28 03:49:46,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-28 03:49:46,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 03:49:46,528 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1102 flow [2024-06-28 03:49:46,528 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) [2024-06-28 03:49:46,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:46,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:46,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:49:46,529 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)] === [2024-06-28 03:49:46,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1028589348, now seen corresponding path program 2 times [2024-06-28 03:49:46,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:46,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279217402] [2024-06-28 03:49:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:46,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279217402] [2024-06-28 03:49:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279217402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510348739] [2024-06-28 03:49:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:49,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:49,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1102 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) [2024-06-28 03:49:49,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:49,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:49,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:50,617 INFO L124 PetriNetUnfolderBase]: 2016/3048 cut-off events. [2024-06-28 03:49:50,618 INFO L125 PetriNetUnfolderBase]: For 25135/25137 co-relation queries the response was YES. [2024-06-28 03:49:50,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15507 conditions, 3048 events. 2016/3048 cut-off events. For 25135/25137 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14793 event pairs, 601 based on Foata normal form. 12/3059 useless extension candidates. Maximal degree in co-relation 15462. Up to 2531 conditions per place. [2024-06-28 03:49:50,638 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 127 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-28 03:49:50,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 1870 flow [2024-06-28 03:49:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:49:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:49:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 03:49:50,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-28 03:49:50,642 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1102 flow. Second operand 10 states and 193 transitions. [2024-06-28 03:49:50,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 1870 flow [2024-06-28 03:49:50,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1723 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 03:49:50,686 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1254 flow [2024-06-28 03:49:50,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-28 03:49:50,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-28 03:49:50,687 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1254 flow [2024-06-28 03:49:50,687 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) [2024-06-28 03:49:50,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:50,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:50,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:49:50,687 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)] === [2024-06-28 03:49:50,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1623535496, now seen corresponding path program 3 times [2024-06-28 03:49:50,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:50,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819040722] [2024-06-28 03:49:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:50,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:53,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:53,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819040722] [2024-06-28 03:49:53,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819040722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:53,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:53,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172091333] [2024-06-28 03:49:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:53,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:53,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:53,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:53,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:53,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1254 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) [2024-06-28 03:49:53,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:53,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:55,530 INFO L124 PetriNetUnfolderBase]: 2028/3082 cut-off events. [2024-06-28 03:49:55,530 INFO L125 PetriNetUnfolderBase]: For 28601/28603 co-relation queries the response was YES. [2024-06-28 03:49:55,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16250 conditions, 3082 events. 2028/3082 cut-off events. For 28601/28603 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15134 event pairs, 590 based on Foata normal form. 12/3093 useless extension candidates. Maximal degree in co-relation 16202. Up to 2544 conditions per place. [2024-06-28 03:49:55,546 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-28 03:49:55,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 1938 flow [2024-06-28 03:49:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:49:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:49:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-28 03:49:55,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:49:55,549 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1254 flow. Second operand 12 states and 224 transitions. [2024-06-28 03:49:55,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 1938 flow [2024-06-28 03:49:55,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1845 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:49:55,584 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1350 flow [2024-06-28 03:49:55,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1350, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-28 03:49:55,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 03:49:55,586 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1350 flow [2024-06-28 03:49:55,586 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) [2024-06-28 03:49:55,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:55,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:55,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:49:55,586 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)] === [2024-06-28 03:49:55,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1325949594, now seen corresponding path program 4 times [2024-06-28 03:49:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:55,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384073545] [2024-06-28 03:49:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384073545] [2024-06-28 03:49:58,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384073545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:58,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:58,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652767506] [2024-06-28 03:49:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:58,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:58,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:49:58,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1350 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) [2024-06-28 03:49:58,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:58,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:49:58,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:00,539 INFO L124 PetriNetUnfolderBase]: 2240/3422 cut-off events. [2024-06-28 03:50:00,539 INFO L125 PetriNetUnfolderBase]: For 34528/34530 co-relation queries the response was YES. [2024-06-28 03:50:00,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18661 conditions, 3422 events. 2240/3422 cut-off events. For 34528/34530 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17287 event pairs, 564 based on Foata normal form. 12/3433 useless extension candidates. Maximal degree in co-relation 18611. Up to 2604 conditions per place. [2024-06-28 03:50:00,561 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 118 selfloop transitions, 84 changer transitions 0/206 dead transitions. [2024-06-28 03:50:00,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 206 transitions, 2282 flow [2024-06-28 03:50:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:50:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:50:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:50:00,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 03:50:00,565 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1350 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:50:00,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 206 transitions, 2282 flow [2024-06-28 03:50:00,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 206 transitions, 2092 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-28 03:50:00,605 INFO L231 Difference]: Finished difference. Result has 110 places, 157 transitions, 1746 flow [2024-06-28 03:50:00,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1746, PETRI_PLACES=110, PETRI_TRANSITIONS=157} [2024-06-28 03:50:00,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-28 03:50:00,606 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 157 transitions, 1746 flow [2024-06-28 03:50:00,606 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) [2024-06-28 03:50:00,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:00,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:50:00,607 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)] === [2024-06-28 03:50:00,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 110061292, now seen corresponding path program 5 times [2024-06-28 03:50:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733866567] [2024-06-28 03:50:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:03,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733866567] [2024-06-28 03:50:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733866567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:03,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:03,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215693938] [2024-06-28 03:50:03,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:03,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:03,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 157 transitions, 1746 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) [2024-06-28 03:50:03,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:03,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:03,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:05,179 INFO L124 PetriNetUnfolderBase]: 2230/3424 cut-off events. [2024-06-28 03:50:05,179 INFO L125 PetriNetUnfolderBase]: For 38135/38156 co-relation queries the response was YES. [2024-06-28 03:50:05,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 3424 events. 2230/3424 cut-off events. For 38135/38156 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17407 event pairs, 661 based on Foata normal form. 25/3448 useless extension candidates. Maximal degree in co-relation 19387. Up to 2948 conditions per place. [2024-06-28 03:50:05,200 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 45 changer transitions 0/221 dead transitions. [2024-06-28 03:50:05,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 221 transitions, 2585 flow [2024-06-28 03:50:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:50:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:50:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:50:05,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:50:05,203 INFO L175 Difference]: Start difference. First operand has 110 places, 157 transitions, 1746 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:50:05,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 221 transitions, 2585 flow [2024-06-28 03:50:05,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 221 transitions, 2480 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 03:50:05,262 INFO L231 Difference]: Finished difference. Result has 117 places, 175 transitions, 2029 flow [2024-06-28 03:50:05,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2029, PETRI_PLACES=117, PETRI_TRANSITIONS=175} [2024-06-28 03:50:05,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-28 03:50:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 175 transitions, 2029 flow [2024-06-28 03:50:05,263 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) [2024-06-28 03:50:05,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:50:05,263 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)] === [2024-06-28 03:50:05,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash 407465992, now seen corresponding path program 6 times [2024-06-28 03:50:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268611446] [2024-06-28 03:50:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:08,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:08,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268611446] [2024-06-28 03:50:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268611446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:08,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:08,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:08,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252499712] [2024-06-28 03:50:08,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:08,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:08,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 175 transitions, 2029 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) [2024-06-28 03:50:08,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:08,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:08,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:09,605 INFO L124 PetriNetUnfolderBase]: 2210/3388 cut-off events. [2024-06-28 03:50:09,605 INFO L125 PetriNetUnfolderBase]: For 41852/41854 co-relation queries the response was YES. [2024-06-28 03:50:09,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19868 conditions, 3388 events. 2210/3388 cut-off events. For 41852/41854 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17190 event pairs, 618 based on Foata normal form. 12/3399 useless extension candidates. Maximal degree in co-relation 19811. Up to 2579 conditions per place. [2024-06-28 03:50:09,628 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 94 changer transitions 0/226 dead transitions. [2024-06-28 03:50:09,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 226 transitions, 2668 flow [2024-06-28 03:50:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:50:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:50:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:50:09,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-28 03:50:09,630 INFO L175 Difference]: Start difference. First operand has 117 places, 175 transitions, 2029 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:50:09,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 226 transitions, 2668 flow [2024-06-28 03:50:09,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2546 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-28 03:50:09,696 INFO L231 Difference]: Finished difference. Result has 122 places, 176 transitions, 2161 flow [2024-06-28 03:50:09,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2161, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2024-06-28 03:50:09,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 03:50:09,697 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 2161 flow [2024-06-28 03:50:09,697 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) [2024-06-28 03:50:09,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:09,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:09,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:50:09,698 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)] === [2024-06-28 03:50:09,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1939650448, now seen corresponding path program 1 times [2024-06-28 03:50:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740041899] [2024-06-28 03:50:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:09,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740041899] [2024-06-28 03:50:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740041899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:12,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:12,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303896155] [2024-06-28 03:50:12,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:12,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:12,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:12,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 2161 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) [2024-06-28 03:50:12,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:12,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:12,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:13,741 INFO L124 PetriNetUnfolderBase]: 2238/3432 cut-off events. [2024-06-28 03:50:13,741 INFO L125 PetriNetUnfolderBase]: For 46439/46441 co-relation queries the response was YES. [2024-06-28 03:50:13,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20903 conditions, 3432 events. 2238/3432 cut-off events. For 46439/46441 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17541 event pairs, 501 based on Foata normal form. 8/3439 useless extension candidates. Maximal degree in co-relation 20844. Up to 2990 conditions per place. [2024-06-28 03:50:13,765 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 47 changer transitions 0/224 dead transitions. [2024-06-28 03:50:13,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2895 flow [2024-06-28 03:50:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:50:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:50:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:50:13,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:50:13,767 INFO L175 Difference]: Start difference. First operand has 122 places, 176 transitions, 2161 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:50:13,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2895 flow [2024-06-28 03:50:13,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 224 transitions, 2780 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 03:50:13,823 INFO L231 Difference]: Finished difference. Result has 125 places, 180 transitions, 2231 flow [2024-06-28 03:50:13,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2231, PETRI_PLACES=125, PETRI_TRANSITIONS=180} [2024-06-28 03:50:13,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 03:50:13,825 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 180 transitions, 2231 flow [2024-06-28 03:50:13,825 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) [2024-06-28 03:50:13,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:13,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:13,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:50:13,826 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:13,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:13,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1939589998, now seen corresponding path program 2 times [2024-06-28 03:50:13,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:13,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753797727] [2024-06-28 03:50:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:13,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:17,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:17,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753797727] [2024-06-28 03:50:17,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753797727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:17,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:17,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:17,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938344196] [2024-06-28 03:50:17,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:17,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:17,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 180 transitions, 2231 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) [2024-06-28 03:50:17,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:17,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:17,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:18,788 INFO L124 PetriNetUnfolderBase]: 2266/3482 cut-off events. [2024-06-28 03:50:18,788 INFO L125 PetriNetUnfolderBase]: For 51232/51234 co-relation queries the response was YES. [2024-06-28 03:50:18,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3482 events. 2266/3482 cut-off events. For 51232/51234 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17820 event pairs, 661 based on Foata normal form. 8/3489 useless extension candidates. Maximal degree in co-relation 21230. Up to 3151 conditions per place. [2024-06-28 03:50:18,811 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/222 dead transitions. [2024-06-28 03:50:18,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2835 flow [2024-06-28 03:50:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:50:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:50:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:50:18,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:50:18,813 INFO L175 Difference]: Start difference. First operand has 125 places, 180 transitions, 2231 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:50:18,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2835 flow [2024-06-28 03:50:18,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2729 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 03:50:18,879 INFO L231 Difference]: Finished difference. Result has 129 places, 182 transitions, 2270 flow [2024-06-28 03:50:18,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2270, PETRI_PLACES=129, PETRI_TRANSITIONS=182} [2024-06-28 03:50:18,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-28 03:50:18,879 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 182 transitions, 2270 flow [2024-06-28 03:50:18,879 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) [2024-06-28 03:50:18,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:18,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:50:18,880 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)] === [2024-06-28 03:50:18,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1821502318, now seen corresponding path program 3 times [2024-06-28 03:50:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:18,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256444358] [2024-06-28 03:50:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:21,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:21,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256444358] [2024-06-28 03:50:21,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256444358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:21,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259331074] [2024-06-28 03:50:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:21,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:21,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:21,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 182 transitions, 2270 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) [2024-06-28 03:50:21,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:21,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:21,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:22,970 INFO L124 PetriNetUnfolderBase]: 2294/3508 cut-off events. [2024-06-28 03:50:22,971 INFO L125 PetriNetUnfolderBase]: For 54345/54347 co-relation queries the response was YES. [2024-06-28 03:50:22,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21606 conditions, 3508 events. 2294/3508 cut-off events. For 54345/54347 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17865 event pairs, 655 based on Foata normal form. 8/3515 useless extension candidates. Maximal degree in co-relation 21544. Up to 3249 conditions per place. [2024-06-28 03:50:22,997 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-28 03:50:22,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 220 transitions, 2843 flow [2024-06-28 03:50:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:50:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:50:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:50:22,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:50:22,999 INFO L175 Difference]: Start difference. First operand has 129 places, 182 transitions, 2270 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:50:22,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 220 transitions, 2843 flow [2024-06-28 03:50:23,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2738 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 03:50:23,076 INFO L231 Difference]: Finished difference. Result has 131 places, 184 transitions, 2280 flow [2024-06-28 03:50:23,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2280, PETRI_PLACES=131, PETRI_TRANSITIONS=184} [2024-06-28 03:50:23,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-28 03:50:23,077 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 184 transitions, 2280 flow [2024-06-28 03:50:23,077 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) [2024-06-28 03:50:23,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:23,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:23,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:50:23,077 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)] === [2024-06-28 03:50:23,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1946050150, now seen corresponding path program 1 times [2024-06-28 03:50:23,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:23,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694366343] [2024-06-28 03:50:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:27,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:27,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694366343] [2024-06-28 03:50:27,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694366343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:27,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:27,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082762134] [2024-06-28 03:50:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:27,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:27,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 184 transitions, 2280 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) [2024-06-28 03:50:27,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:27,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:27,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:28,724 INFO L124 PetriNetUnfolderBase]: 2382/3601 cut-off events. [2024-06-28 03:50:28,724 INFO L125 PetriNetUnfolderBase]: For 62059/62061 co-relation queries the response was YES. [2024-06-28 03:50:28,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22272 conditions, 3601 events. 2382/3601 cut-off events. For 62059/62061 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18068 event pairs, 596 based on Foata normal form. 20/3620 useless extension candidates. Maximal degree in co-relation 22209. Up to 3118 conditions per place. [2024-06-28 03:50:28,751 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-28 03:50:28,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 241 transitions, 3027 flow [2024-06-28 03:50:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:50:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:50:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 03:50:28,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 03:50:28,758 INFO L175 Difference]: Start difference. First operand has 131 places, 184 transitions, 2280 flow. Second operand 10 states and 186 transitions. [2024-06-28 03:50:28,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 241 transitions, 3027 flow [2024-06-28 03:50:28,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 241 transitions, 2944 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 03:50:28,832 INFO L231 Difference]: Finished difference. Result has 135 places, 187 transitions, 2373 flow [2024-06-28 03:50:28,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2373, PETRI_PLACES=135, PETRI_TRANSITIONS=187} [2024-06-28 03:50:28,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-28 03:50:28,833 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 187 transitions, 2373 flow [2024-06-28 03:50:28,833 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) [2024-06-28 03:50:28,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:28,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:28,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:50:28,834 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)] === [2024-06-28 03:50:28,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1845412128, now seen corresponding path program 4 times [2024-06-28 03:50:28,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:28,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515715908] [2024-06-28 03:50:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:28,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:31,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515715908] [2024-06-28 03:50:31,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515715908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:31,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:31,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068232312] [2024-06-28 03:50:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:31,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:32,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:32,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 187 transitions, 2373 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) [2024-06-28 03:50:32,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:32,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:32,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:33,418 INFO L124 PetriNetUnfolderBase]: 2369/3629 cut-off events. [2024-06-28 03:50:33,418 INFO L125 PetriNetUnfolderBase]: For 63780/63782 co-relation queries the response was YES. [2024-06-28 03:50:33,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 3629 events. 2369/3629 cut-off events. For 63780/63782 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18708 event pairs, 516 based on Foata normal form. 8/3636 useless extension candidates. Maximal degree in co-relation 22684. Up to 3250 conditions per place. [2024-06-28 03:50:33,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 46 changer transitions 0/221 dead transitions. [2024-06-28 03:50:33,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 221 transitions, 2905 flow [2024-06-28 03:50:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:50:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:50:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:50:33,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-28 03:50:33,444 INFO L175 Difference]: Start difference. First operand has 135 places, 187 transitions, 2373 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:50:33,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 221 transitions, 2905 flow [2024-06-28 03:50:33,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 221 transitions, 2749 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 03:50:33,540 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 2326 flow [2024-06-28 03:50:33,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2024-06-28 03:50:33,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-28 03:50:33,541 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 2326 flow [2024-06-28 03:50:33,541 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) [2024-06-28 03:50:33,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:33,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:50:33,542 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)] === [2024-06-28 03:50:33,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1845227430, now seen corresponding path program 2 times [2024-06-28 03:50:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:33,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814587815] [2024-06-28 03:50:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:36,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:36,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814587815] [2024-06-28 03:50:36,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814587815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:36,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:36,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:36,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117882277] [2024-06-28 03:50:36,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:36,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:36,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:36,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:36,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 2326 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) [2024-06-28 03:50:36,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:36,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:36,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:37,986 INFO L124 PetriNetUnfolderBase]: 2457/3724 cut-off events. [2024-06-28 03:50:37,986 INFO L125 PetriNetUnfolderBase]: For 70902/70904 co-relation queries the response was YES. [2024-06-28 03:50:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23254 conditions, 3724 events. 2457/3724 cut-off events. For 70902/70904 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18929 event pairs, 590 based on Foata normal form. 20/3743 useless extension candidates. Maximal degree in co-relation 23189. Up to 3139 conditions per place. [2024-06-28 03:50:38,013 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 57 changer transitions 0/230 dead transitions. [2024-06-28 03:50:38,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 230 transitions, 2984 flow [2024-06-28 03:50:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:50:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:50:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:50:38,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:50:38,015 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 2326 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:50:38,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 230 transitions, 2984 flow [2024-06-28 03:50:38,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 230 transitions, 2879 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:50:38,099 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 2417 flow [2024-06-28 03:50:38,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2417, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2024-06-28 03:50:38,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-28 03:50:38,100 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 2417 flow [2024-06-28 03:50:38,101 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) [2024-06-28 03:50:38,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:38,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:38,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:50:38,101 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)] === [2024-06-28 03:50:38,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -882828488, now seen corresponding path program 3 times [2024-06-28 03:50:38,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:38,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012521133] [2024-06-28 03:50:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:38,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:41,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:41,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012521133] [2024-06-28 03:50:41,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012521133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:41,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:41,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:41,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369863752] [2024-06-28 03:50:41,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:41,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:41,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:41,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:41,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 2417 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:41,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:41,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:42,302 INFO L124 PetriNetUnfolderBase]: 2477/3817 cut-off events. [2024-06-28 03:50:42,302 INFO L125 PetriNetUnfolderBase]: For 68670/68693 co-relation queries the response was YES. [2024-06-28 03:50:42,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24024 conditions, 3817 events. 2477/3817 cut-off events. For 68670/68693 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19842 event pairs, 659 based on Foata normal form. 27/3843 useless extension candidates. Maximal degree in co-relation 23958. Up to 3500 conditions per place. [2024-06-28 03:50:42,333 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 24 changer transitions 0/221 dead transitions. [2024-06-28 03:50:42,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 221 transitions, 2959 flow [2024-06-28 03:50:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:50:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:50:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:50:42,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 03:50:42,336 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 2417 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:50:42,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 221 transitions, 2959 flow [2024-06-28 03:50:42,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 221 transitions, 2805 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:50:42,437 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 2354 flow [2024-06-28 03:50:42,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2354, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-28 03:50:42,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 03:50:42,438 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 2354 flow [2024-06-28 03:50:42,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:42,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:42,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:42,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:50:42,438 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)] === [2024-06-28 03:50:42,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1838732310, now seen corresponding path program 4 times [2024-06-28 03:50:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:42,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894445383] [2024-06-28 03:50:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:42,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:45,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:45,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894445383] [2024-06-28 03:50:45,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894445383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:45,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:45,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:45,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947025111] [2024-06-28 03:50:45,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:45,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:45,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:45,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 2354 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) [2024-06-28 03:50:45,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:45,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:45,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:46,668 INFO L124 PetriNetUnfolderBase]: 2469/3797 cut-off events. [2024-06-28 03:50:46,669 INFO L125 PetriNetUnfolderBase]: For 66247/66270 co-relation queries the response was YES. [2024-06-28 03:50:46,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23445 conditions, 3797 events. 2469/3797 cut-off events. For 66247/66270 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19691 event pairs, 619 based on Foata normal form. 27/3823 useless extension candidates. Maximal degree in co-relation 23378. Up to 3394 conditions per place. [2024-06-28 03:50:46,697 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-28 03:50:46,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 225 transitions, 2924 flow [2024-06-28 03:50:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:50:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:50:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:50:46,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 03:50:46,703 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 2354 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:50:46,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 225 transitions, 2924 flow [2024-06-28 03:50:46,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2855 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:50:46,781 INFO L231 Difference]: Finished difference. Result has 140 places, 196 transitions, 2426 flow [2024-06-28 03:50:46,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=140, PETRI_TRANSITIONS=196} [2024-06-28 03:50:46,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-28 03:50:46,782 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 196 transitions, 2426 flow [2024-06-28 03:50:46,782 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) [2024-06-28 03:50:46,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:46,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:46,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:50:46,782 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:46,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash -968757920, now seen corresponding path program 1 times [2024-06-28 03:50:46,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601732983] [2024-06-28 03:50:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:46,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:48,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:48,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601732983] [2024-06-28 03:50:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601732983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:48,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:50:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611810617] [2024-06-28 03:50:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:48,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:50:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:50:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:50:48,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:48,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 196 transitions, 2426 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) [2024-06-28 03:50:48,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:48,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:48,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:49,879 INFO L124 PetriNetUnfolderBase]: 2446/3768 cut-off events. [2024-06-28 03:50:49,880 INFO L125 PetriNetUnfolderBase]: For 71666/71688 co-relation queries the response was YES. [2024-06-28 03:50:49,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23810 conditions, 3768 events. 2446/3768 cut-off events. For 71666/71688 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19539 event pairs, 622 based on Foata normal form. 28/3782 useless extension candidates. Maximal degree in co-relation 23741. Up to 3495 conditions per place. [2024-06-28 03:50:49,910 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-28 03:50:49,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 224 transitions, 3040 flow [2024-06-28 03:50:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:50:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:50:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 03:50:49,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 03:50:49,924 INFO L175 Difference]: Start difference. First operand has 140 places, 196 transitions, 2426 flow. Second operand 6 states and 109 transitions. [2024-06-28 03:50:49,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 224 transitions, 3040 flow [2024-06-28 03:50:50,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 224 transitions, 2957 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 03:50:50,019 INFO L231 Difference]: Finished difference. Result has 143 places, 204 transitions, 2512 flow [2024-06-28 03:50:50,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2512, PETRI_PLACES=143, PETRI_TRANSITIONS=204} [2024-06-28 03:50:50,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-28 03:50:50,019 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 204 transitions, 2512 flow [2024-06-28 03:50:50,020 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) [2024-06-28 03:50:50,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:50,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:50,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:50:50,020 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)] === [2024-06-28 03:50:50,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash 379583, now seen corresponding path program 1 times [2024-06-28 03:50:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242893796] [2024-06-28 03:50:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:53,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242893796] [2024-06-28 03:50:53,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242893796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:53,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902517680] [2024-06-28 03:50:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:53,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:53,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:53,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 204 transitions, 2512 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) [2024-06-28 03:50:53,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:53,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:53,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:55,404 INFO L124 PetriNetUnfolderBase]: 3587/5595 cut-off events. [2024-06-28 03:50:55,404 INFO L125 PetriNetUnfolderBase]: For 141690/141692 co-relation queries the response was YES. [2024-06-28 03:50:55,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34893 conditions, 5595 events. 3587/5595 cut-off events. For 141690/141692 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31811 event pairs, 748 based on Foata normal form. 66/5660 useless extension candidates. Maximal degree in co-relation 34822. Up to 2330 conditions per place. [2024-06-28 03:50:55,445 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 117 changer transitions 0/308 dead transitions. [2024-06-28 03:50:55,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 308 transitions, 3915 flow [2024-06-28 03:50:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:50:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:50:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-28 03:50:55,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-28 03:50:55,447 INFO L175 Difference]: Start difference. First operand has 143 places, 204 transitions, 2512 flow. Second operand 11 states and 230 transitions. [2024-06-28 03:50:55,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 308 transitions, 3915 flow [2024-06-28 03:50:55,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 308 transitions, 3854 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-28 03:50:55,589 INFO L231 Difference]: Finished difference. Result has 154 places, 213 transitions, 2927 flow [2024-06-28 03:50:55,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2927, PETRI_PLACES=154, PETRI_TRANSITIONS=213} [2024-06-28 03:50:55,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:50:55,590 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 213 transitions, 2927 flow [2024-06-28 03:50:55,590 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) [2024-06-28 03:50:55,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:55,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:55,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:50:55,591 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)] === [2024-06-28 03:50:55,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:55,591 INFO L85 PathProgramCache]: Analyzing trace with hash 517352079, now seen corresponding path program 2 times [2024-06-28 03:50:55,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:55,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032895763] [2024-06-28 03:50:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:55,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032895763] [2024-06-28 03:50:58,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032895763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:58,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:58,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482116648] [2024-06-28 03:50:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:58,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:50:58,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 213 transitions, 2927 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) [2024-06-28 03:50:58,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:58,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:50:58,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:00,872 INFO L124 PetriNetUnfolderBase]: 3899/6122 cut-off events. [2024-06-28 03:51:00,872 INFO L125 PetriNetUnfolderBase]: For 167635/167637 co-relation queries the response was YES. [2024-06-28 03:51:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38641 conditions, 6122 events. 3899/6122 cut-off events. For 167635/167637 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35893 event pairs, 1263 based on Foata normal form. 76/6197 useless extension candidates. Maximal degree in co-relation 38566. Up to 4557 conditions per place. [2024-06-28 03:51:00,925 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 116 changer transitions 0/287 dead transitions. [2024-06-28 03:51:00,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 287 transitions, 3892 flow [2024-06-28 03:51:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:51:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:51:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-28 03:51:00,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 03:51:00,927 INFO L175 Difference]: Start difference. First operand has 154 places, 213 transitions, 2927 flow. Second operand 12 states and 230 transitions. [2024-06-28 03:51:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 287 transitions, 3892 flow [2024-06-28 03:51:01,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 287 transitions, 3675 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 03:51:01,165 INFO L231 Difference]: Finished difference. Result has 161 places, 215 transitions, 3012 flow [2024-06-28 03:51:01,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3012, PETRI_PLACES=161, PETRI_TRANSITIONS=215} [2024-06-28 03:51:01,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 03:51:01,166 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 215 transitions, 3012 flow [2024-06-28 03:51:01,166 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) [2024-06-28 03:51:01,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:01,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:01,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:51:01,166 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)] === [2024-06-28 03:51:01,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash 88945343, now seen corresponding path program 3 times [2024-06-28 03:51:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:01,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131577160] [2024-06-28 03:51:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:05,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:05,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131577160] [2024-06-28 03:51:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131577160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:05,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:05,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:05,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396322952] [2024-06-28 03:51:05,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:05,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:05,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:05,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 215 transitions, 3012 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) [2024-06-28 03:51:05,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:05,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:05,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:07,824 INFO L124 PetriNetUnfolderBase]: 4452/7024 cut-off events. [2024-06-28 03:51:07,824 INFO L125 PetriNetUnfolderBase]: For 193060/193062 co-relation queries the response was YES. [2024-06-28 03:51:07,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43847 conditions, 7024 events. 4452/7024 cut-off events. For 193060/193062 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42727 event pairs, 1447 based on Foata normal form. 66/7089 useless extension candidates. Maximal degree in co-relation 43770. Up to 4472 conditions per place. [2024-06-28 03:51:07,969 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 118 changer transitions 0/304 dead transitions. [2024-06-28 03:51:07,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 304 transitions, 4176 flow [2024-06-28 03:51:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:51:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:51:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-28 03:51:07,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-28 03:51:07,971 INFO L175 Difference]: Start difference. First operand has 161 places, 215 transitions, 3012 flow. Second operand 12 states and 241 transitions. [2024-06-28 03:51:07,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 304 transitions, 4176 flow [2024-06-28 03:51:08,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 304 transitions, 3907 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-28 03:51:08,205 INFO L231 Difference]: Finished difference. Result has 164 places, 220 transitions, 3112 flow [2024-06-28 03:51:08,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3112, PETRI_PLACES=164, PETRI_TRANSITIONS=220} [2024-06-28 03:51:08,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 03:51:08,206 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 220 transitions, 3112 flow [2024-06-28 03:51:08,206 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) [2024-06-28 03:51:08,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:08,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:08,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:51:08,207 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)] === [2024-06-28 03:51:08,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1144520743, now seen corresponding path program 4 times [2024-06-28 03:51:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70582842] [2024-06-28 03:51:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:08,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:11,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:11,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70582842] [2024-06-28 03:51:11,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70582842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:11,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:11,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:11,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239236355] [2024-06-28 03:51:11,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:11,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:11,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:11,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:11,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:11,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:11,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 220 transitions, 3112 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) [2024-06-28 03:51:11,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:11,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:11,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:14,263 INFO L124 PetriNetUnfolderBase]: 4764/7518 cut-off events. [2024-06-28 03:51:14,264 INFO L125 PetriNetUnfolderBase]: For 216008/216010 co-relation queries the response was YES. [2024-06-28 03:51:14,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46429 conditions, 7518 events. 4764/7518 cut-off events. For 216008/216010 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46449 event pairs, 1799 based on Foata normal form. 76/7593 useless extension candidates. Maximal degree in co-relation 46350. Up to 6292 conditions per place. [2024-06-28 03:51:14,323 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 85 changer transitions 0/301 dead transitions. [2024-06-28 03:51:14,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 301 transitions, 4152 flow [2024-06-28 03:51:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:51:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:51:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-28 03:51:14,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-28 03:51:14,325 INFO L175 Difference]: Start difference. First operand has 164 places, 220 transitions, 3112 flow. Second operand 13 states and 246 transitions. [2024-06-28 03:51:14,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 301 transitions, 4152 flow [2024-06-28 03:51:14,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 301 transitions, 3941 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 03:51:14,634 INFO L231 Difference]: Finished difference. Result has 169 places, 222 transitions, 3150 flow [2024-06-28 03:51:14,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3150, PETRI_PLACES=169, PETRI_TRANSITIONS=222} [2024-06-28 03:51:14,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 03:51:14,635 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 222 transitions, 3150 flow [2024-06-28 03:51:14,635 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) [2024-06-28 03:51:14,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:14,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:14,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:51:14,636 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)] === [2024-06-28 03:51:14,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash -203588947, now seen corresponding path program 5 times [2024-06-28 03:51:14,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337794726] [2024-06-28 03:51:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337794726] [2024-06-28 03:51:17,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337794726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:17,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:17,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747003934] [2024-06-28 03:51:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:17,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:17,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 222 transitions, 3150 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) [2024-06-28 03:51:17,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:17,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:20,267 INFO L124 PetriNetUnfolderBase]: 5076/8042 cut-off events. [2024-06-28 03:51:20,267 INFO L125 PetriNetUnfolderBase]: For 229764/229766 co-relation queries the response was YES. [2024-06-28 03:51:20,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49073 conditions, 8042 events. 5076/8042 cut-off events. For 229764/229766 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50771 event pairs, 1952 based on Foata normal form. 76/8117 useless extension candidates. Maximal degree in co-relation 48992. Up to 6816 conditions per place. [2024-06-28 03:51:20,337 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 81 changer transitions 0/293 dead transitions. [2024-06-28 03:51:20,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 293 transitions, 4160 flow [2024-06-28 03:51:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:51:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:51:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-28 03:51:20,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-28 03:51:20,339 INFO L175 Difference]: Start difference. First operand has 169 places, 222 transitions, 3150 flow. Second operand 11 states and 214 transitions. [2024-06-28 03:51:20,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 293 transitions, 4160 flow [2024-06-28 03:51:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 293 transitions, 3950 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-28 03:51:20,763 INFO L231 Difference]: Finished difference. Result has 169 places, 224 transitions, 3183 flow [2024-06-28 03:51:20,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3183, PETRI_PLACES=169, PETRI_TRANSITIONS=224} [2024-06-28 03:51:20,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 03:51:20,764 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 224 transitions, 3183 flow [2024-06-28 03:51:20,764 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) [2024-06-28 03:51:20,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:20,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:51:20,765 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)] === [2024-06-28 03:51:20,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash -631995683, now seen corresponding path program 6 times [2024-06-28 03:51:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457138206] [2024-06-28 03:51:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:24,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:24,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457138206] [2024-06-28 03:51:24,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457138206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:24,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:24,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463645851] [2024-06-28 03:51:24,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:24,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:24,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 224 transitions, 3183 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) [2024-06-28 03:51:24,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:24,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:27,412 INFO L124 PetriNetUnfolderBase]: 6757/10767 cut-off events. [2024-06-28 03:51:27,413 INFO L125 PetriNetUnfolderBase]: For 289245/289262 co-relation queries the response was YES. [2024-06-28 03:51:27,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64888 conditions, 10767 events. 6757/10767 cut-off events. For 289245/289262 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 71961 event pairs, 2402 based on Foata normal form. 77/10843 useless extension candidates. Maximal degree in co-relation 64806. Up to 7888 conditions per place. [2024-06-28 03:51:27,649 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 277 selfloop transitions, 91 changer transitions 0/372 dead transitions. [2024-06-28 03:51:27,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 372 transitions, 5804 flow [2024-06-28 03:51:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:51:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:51:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 227 transitions. [2024-06-28 03:51:27,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-06-28 03:51:27,651 INFO L175 Difference]: Start difference. First operand has 169 places, 224 transitions, 3183 flow. Second operand 12 states and 227 transitions. [2024-06-28 03:51:27,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 372 transitions, 5804 flow [2024-06-28 03:51:28,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 372 transitions, 5436 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-28 03:51:28,182 INFO L231 Difference]: Finished difference. Result has 179 places, 286 transitions, 4475 flow [2024-06-28 03:51:28,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4475, PETRI_PLACES=179, PETRI_TRANSITIONS=286} [2024-06-28 03:51:28,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-28 03:51:28,183 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 286 transitions, 4475 flow [2024-06-28 03:51:28,183 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) [2024-06-28 03:51:28,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:28,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:28,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:51:28,183 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)] === [2024-06-28 03:51:28,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1865468193, now seen corresponding path program 7 times [2024-06-28 03:51:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652147070] [2024-06-28 03:51:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:30,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:30,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652147070] [2024-06-28 03:51:30,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652147070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:30,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:30,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:30,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924934952] [2024-06-28 03:51:30,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:30,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:30,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:30,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:30,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 286 transitions, 4475 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) [2024-06-28 03:51:30,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:30,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:30,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:34,498 INFO L124 PetriNetUnfolderBase]: 9119/14512 cut-off events. [2024-06-28 03:51:34,498 INFO L125 PetriNetUnfolderBase]: For 396569/396571 co-relation queries the response was YES. [2024-06-28 03:51:34,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88995 conditions, 14512 events. 9119/14512 cut-off events. For 396569/396571 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 101623 event pairs, 2980 based on Foata normal form. 66/14577 useless extension candidates. Maximal degree in co-relation 88905. Up to 8979 conditions per place. [2024-06-28 03:51:34,875 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 282 selfloop transitions, 195 changer transitions 0/481 dead transitions. [2024-06-28 03:51:34,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 481 transitions, 8190 flow [2024-06-28 03:51:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:51:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:51:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-28 03:51:34,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-28 03:51:34,878 INFO L175 Difference]: Start difference. First operand has 179 places, 286 transitions, 4475 flow. Second operand 13 states and 258 transitions. [2024-06-28 03:51:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 481 transitions, 8190 flow [2024-06-28 03:51:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 481 transitions, 8012 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-28 03:51:35,962 INFO L231 Difference]: Finished difference. Result has 196 places, 379 transitions, 6967 flow [2024-06-28 03:51:35,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6967, PETRI_PLACES=196, PETRI_TRANSITIONS=379} [2024-06-28 03:51:35,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-28 03:51:35,963 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 379 transitions, 6967 flow [2024-06-28 03:51:35,963 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) [2024-06-28 03:51:35,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:35,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:51:35,963 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)] === [2024-06-28 03:51:35,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -626270231, now seen corresponding path program 1 times [2024-06-28 03:51:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:35,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048504016] [2024-06-28 03:51:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:35,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:40,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:40,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048504016] [2024-06-28 03:51:40,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048504016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:40,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:40,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:51:40,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006157227] [2024-06-28 03:51:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:40,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:51:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:51:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:51:40,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:40,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 379 transitions, 6967 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) [2024-06-28 03:51:40,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:40,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:40,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:44,852 INFO L124 PetriNetUnfolderBase]: 9331/14958 cut-off events. [2024-06-28 03:51:44,853 INFO L125 PetriNetUnfolderBase]: For 421053/421055 co-relation queries the response was YES. [2024-06-28 03:51:44,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93349 conditions, 14958 events. 9331/14958 cut-off events. For 421053/421055 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 106348 event pairs, 3265 based on Foata normal form. 56/15013 useless extension candidates. Maximal degree in co-relation 93250. Up to 9331 conditions per place. [2024-06-28 03:51:45,011 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 232 selfloop transitions, 229 changer transitions 0/465 dead transitions. [2024-06-28 03:51:45,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 465 transitions, 8442 flow [2024-06-28 03:51:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:51:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:51:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-28 03:51:45,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-28 03:51:45,014 INFO L175 Difference]: Start difference. First operand has 196 places, 379 transitions, 6967 flow. Second operand 13 states and 250 transitions. [2024-06-28 03:51:45,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 465 transitions, 8442 flow [2024-06-28 03:51:46,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 465 transitions, 8333 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-28 03:51:46,211 INFO L231 Difference]: Finished difference. Result has 206 places, 381 transitions, 7396 flow [2024-06-28 03:51:46,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7396, PETRI_PLACES=206, PETRI_TRANSITIONS=381} [2024-06-28 03:51:46,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 03:51:46,212 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 381 transitions, 7396 flow [2024-06-28 03:51:46,212 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) [2024-06-28 03:51:46,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:46,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:46,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:51:46,213 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:46,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1605243253, now seen corresponding path program 8 times [2024-06-28 03:51:46,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:46,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846778587] [2024-06-28 03:51:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:46,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:49,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846778587] [2024-06-28 03:51:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846778587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:49,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:49,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522697394] [2024-06-28 03:51:49,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:49,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:49,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 381 transitions, 7396 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) [2024-06-28 03:51:49,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:49,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:49,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:53,216 INFO L124 PetriNetUnfolderBase]: 9363/15063 cut-off events. [2024-06-28 03:51:53,216 INFO L125 PetriNetUnfolderBase]: For 428094/428126 co-relation queries the response was YES. [2024-06-28 03:51:53,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95360 conditions, 15063 events. 9363/15063 cut-off events. For 428094/428126 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 107876 event pairs, 4078 based on Foata normal form. 52/15114 useless extension candidates. Maximal degree in co-relation 95259. Up to 14017 conditions per place. [2024-06-28 03:51:53,394 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 85 changer transitions 0/437 dead transitions. [2024-06-28 03:51:53,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 437 transitions, 8500 flow [2024-06-28 03:51:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 03:51:53,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:51:53,396 INFO L175 Difference]: Start difference. First operand has 206 places, 381 transitions, 7396 flow. Second operand 10 states and 175 transitions. [2024-06-28 03:51:53,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 437 transitions, 8500 flow [2024-06-28 03:51:54,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 437 transitions, 7978 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-28 03:51:54,718 INFO L231 Difference]: Finished difference. Result has 205 places, 382 transitions, 7085 flow [2024-06-28 03:51:54,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6880, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7085, PETRI_PLACES=205, PETRI_TRANSITIONS=382} [2024-06-28 03:51:54,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 03:51:54,719 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 382 transitions, 7085 flow [2024-06-28 03:51:54,719 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) [2024-06-28 03:51:54,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:54,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:54,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:51:54,720 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)] === [2024-06-28 03:51:54,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash -85606691, now seen corresponding path program 9 times [2024-06-28 03:51:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:54,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995505680] [2024-06-28 03:51:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:54,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:58,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:58,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995505680] [2024-06-28 03:51:58,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995505680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:58,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654186872] [2024-06-28 03:51:58,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:58,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:58,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:58,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:58,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 382 transitions, 7085 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) [2024-06-28 03:51:58,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:58,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:58,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:02,787 INFO L124 PetriNetUnfolderBase]: 10239/16551 cut-off events. [2024-06-28 03:52:02,788 INFO L125 PetriNetUnfolderBase]: For 479509/479520 co-relation queries the response was YES. [2024-06-28 03:52:02,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99905 conditions, 16551 events. 10239/16551 cut-off events. For 479509/479520 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 121857 event pairs, 4100 based on Foata normal form. 85/16635 useless extension candidates. Maximal degree in co-relation 99803. Up to 12602 conditions per place. [2024-06-28 03:52:02,951 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 239 selfloop transitions, 202 changer transitions 0/445 dead transitions. [2024-06-28 03:52:02,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 445 transitions, 8374 flow [2024-06-28 03:52:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 03:52:02,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-28 03:52:02,953 INFO L175 Difference]: Start difference. First operand has 205 places, 382 transitions, 7085 flow. Second operand 10 states and 199 transitions. [2024-06-28 03:52:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 445 transitions, 8374 flow [2024-06-28 03:52:04,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 445 transitions, 8233 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 03:52:04,091 INFO L231 Difference]: Finished difference. Result has 209 places, 384 transitions, 7459 flow [2024-06-28 03:52:04,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7459, PETRI_PLACES=209, PETRI_TRANSITIONS=384} [2024-06-28 03:52:04,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 03:52:04,092 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 384 transitions, 7459 flow [2024-06-28 03:52:04,093 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) [2024-06-28 03:52:04,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:04,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:04,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:52:04,093 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)] === [2024-06-28 03:52:04,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash 738194291, now seen corresponding path program 10 times [2024-06-28 03:52:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932981421] [2024-06-28 03:52:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:07,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:07,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932981421] [2024-06-28 03:52:07,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932981421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:07,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:07,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:52:07,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920564105] [2024-06-28 03:52:07,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:07,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:52:07,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:52:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:52:07,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:07,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 384 transitions, 7459 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) [2024-06-28 03:52:07,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:07,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:07,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:11,669 INFO L124 PetriNetUnfolderBase]: 11074/17947 cut-off events. [2024-06-28 03:52:11,669 INFO L125 PetriNetUnfolderBase]: For 518829/518840 co-relation queries the response was YES. [2024-06-28 03:52:11,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106575 conditions, 17947 events. 11074/17947 cut-off events. For 518829/518840 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 134892 event pairs, 4530 based on Foata normal form. 85/18031 useless extension candidates. Maximal degree in co-relation 106472. Up to 14023 conditions per place. [2024-06-28 03:52:11,878 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 237 selfloop transitions, 201 changer transitions 0/442 dead transitions. [2024-06-28 03:52:11,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 442 transitions, 8666 flow [2024-06-28 03:52:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:52:11,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 03:52:11,880 INFO L175 Difference]: Start difference. First operand has 209 places, 384 transitions, 7459 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:52:11,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 442 transitions, 8666 flow [2024-06-28 03:52:13,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 442 transitions, 8373 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 03:52:13,672 INFO L231 Difference]: Finished difference. Result has 213 places, 386 transitions, 7683 flow [2024-06-28 03:52:13,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7683, PETRI_PLACES=213, PETRI_TRANSITIONS=386} [2024-06-28 03:52:13,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-28 03:52:13,675 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 386 transitions, 7683 flow [2024-06-28 03:52:13,675 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) [2024-06-28 03:52:13,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:13,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:13,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:52:13,676 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)] === [2024-06-28 03:52:13,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -85754561, now seen corresponding path program 11 times [2024-06-28 03:52:13,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:13,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150120171] [2024-06-28 03:52:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:16,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150120171] [2024-06-28 03:52:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150120171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:16,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:16,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:52:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985673883] [2024-06-28 03:52:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:52:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:52:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:52:16,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:16,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 386 transitions, 7683 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) [2024-06-28 03:52:16,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:16,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:16,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:21,991 INFO L124 PetriNetUnfolderBase]: 11869/19317 cut-off events. [2024-06-28 03:52:21,991 INFO L125 PetriNetUnfolderBase]: For 548931/548942 co-relation queries the response was YES. [2024-06-28 03:52:22,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112197 conditions, 19317 events. 11869/19317 cut-off events. For 548931/548942 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 147812 event pairs, 3667 based on Foata normal form. 75/19391 useless extension candidates. Maximal degree in co-relation 112093. Up to 9190 conditions per place. [2024-06-28 03:52:22,258 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 238 selfloop transitions, 223 changer transitions 0/465 dead transitions. [2024-06-28 03:52:22,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 465 transitions, 9273 flow [2024-06-28 03:52:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-28 03:52:22,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 03:52:22,261 INFO L175 Difference]: Start difference. First operand has 213 places, 386 transitions, 7683 flow. Second operand 10 states and 205 transitions. [2024-06-28 03:52:22,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 465 transitions, 9273 flow [2024-06-28 03:52:23,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 465 transitions, 8835 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-28 03:52:23,744 INFO L231 Difference]: Finished difference. Result has 216 places, 394 transitions, 8005 flow [2024-06-28 03:52:23,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7245, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8005, PETRI_PLACES=216, PETRI_TRANSITIONS=394} [2024-06-28 03:52:23,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-28 03:52:23,745 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 394 transitions, 8005 flow [2024-06-28 03:52:23,745 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) [2024-06-28 03:52:23,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:23,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:23,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:52:23,746 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)] === [2024-06-28 03:52:23,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1348527541, now seen corresponding path program 2 times [2024-06-28 03:52:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:23,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748213337] [2024-06-28 03:52:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:27,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:27,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748213337] [2024-06-28 03:52:27,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748213337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:27,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:27,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:52:27,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440648756] [2024-06-28 03:52:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:27,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:52:27,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:52:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:52:27,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:27,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 394 transitions, 8005 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:27,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:27,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:27,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:32,520 INFO L124 PetriNetUnfolderBase]: 11917/19411 cut-off events. [2024-06-28 03:52:32,521 INFO L125 PetriNetUnfolderBase]: For 545038/545070 co-relation queries the response was YES. [2024-06-28 03:52:32,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113901 conditions, 19411 events. 11917/19411 cut-off events. For 545038/545070 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 149108 event pairs, 5701 based on Foata normal form. 44/19454 useless extension candidates. Maximal degree in co-relation 113795. Up to 18241 conditions per place. [2024-06-28 03:52:32,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 88 changer transitions 0/458 dead transitions. [2024-06-28 03:52:32,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 458 transitions, 9177 flow [2024-06-28 03:52:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:52:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:52:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-28 03:52:32,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-28 03:52:32,757 INFO L175 Difference]: Start difference. First operand has 216 places, 394 transitions, 8005 flow. Second operand 11 states and 192 transitions. [2024-06-28 03:52:32,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 458 transitions, 9177 flow [2024-06-28 03:52:34,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 458 transitions, 8489 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-28 03:52:34,953 INFO L231 Difference]: Finished difference. Result has 218 places, 395 transitions, 7529 flow [2024-06-28 03:52:34,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7317, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7529, PETRI_PLACES=218, PETRI_TRANSITIONS=395} [2024-06-28 03:52:34,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-28 03:52:34,954 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 395 transitions, 7529 flow [2024-06-28 03:52:34,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:34,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:34,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:52:34,955 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)] === [2024-06-28 03:52:34,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1339330771, now seen corresponding path program 3 times [2024-06-28 03:52:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117366068] [2024-06-28 03:52:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117366068] [2024-06-28 03:52:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117366068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:38,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:38,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:52:38,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297000542] [2024-06-28 03:52:38,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:38,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:52:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:38,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:52:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:52:38,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:38,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 395 transitions, 7529 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) [2024-06-28 03:52:38,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:38,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:43,441 INFO L124 PetriNetUnfolderBase]: 11965/19483 cut-off events. [2024-06-28 03:52:43,441 INFO L125 PetriNetUnfolderBase]: For 551401/551433 co-relation queries the response was YES. [2024-06-28 03:52:43,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111757 conditions, 19483 events. 11965/19483 cut-off events. For 551401/551433 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 148994 event pairs, 5653 based on Foata normal form. 44/19526 useless extension candidates. Maximal degree in co-relation 111651. Up to 16871 conditions per place. [2024-06-28 03:52:43,730 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 103 changer transitions 0/454 dead transitions. [2024-06-28 03:52:43,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 454 transitions, 8753 flow [2024-06-28 03:52:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 03:52:43,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:52:43,732 INFO L175 Difference]: Start difference. First operand has 218 places, 395 transitions, 7529 flow. Second operand 10 states and 177 transitions. [2024-06-28 03:52:43,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 454 transitions, 8753 flow [2024-06-28 03:52:45,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 454 transitions, 8551 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 03:52:45,273 INFO L231 Difference]: Finished difference. Result has 219 places, 396 transitions, 7569 flow [2024-06-28 03:52:45,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7569, PETRI_PLACES=219, PETRI_TRANSITIONS=396} [2024-06-28 03:52:45,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 03:52:45,274 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 396 transitions, 7569 flow [2024-06-28 03:52:45,274 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) [2024-06-28 03:52:45,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:45,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:45,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:52:45,275 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)] === [2024-06-28 03:52:45,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -80029109, now seen corresponding path program 4 times [2024-06-28 03:52:45,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:45,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57540350] [2024-06-28 03:52:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:49,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:49,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57540350] [2024-06-28 03:52:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57540350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:49,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:49,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:52:49,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720413081] [2024-06-28 03:52:49,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:49,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:52:49,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:52:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:52:49,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:49,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 396 transitions, 7569 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) [2024-06-28 03:52:49,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:49,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:49,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:54,642 INFO L124 PetriNetUnfolderBase]: 12313/20156 cut-off events. [2024-06-28 03:52:54,642 INFO L125 PetriNetUnfolderBase]: For 601340/601351 co-relation queries the response was YES. [2024-06-28 03:52:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114347 conditions, 20156 events. 12313/20156 cut-off events. For 601340/601351 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 156835 event pairs, 4832 based on Foata normal form. 65/20220 useless extension candidates. Maximal degree in co-relation 114240. Up to 12990 conditions per place. [2024-06-28 03:52:54,894 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 248 selfloop transitions, 207 changer transitions 0/459 dead transitions. [2024-06-28 03:52:54,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 459 transitions, 8765 flow [2024-06-28 03:52:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:52:54,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 03:52:54,897 INFO L175 Difference]: Start difference. First operand has 219 places, 396 transitions, 7569 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:52:54,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 459 transitions, 8765 flow [2024-06-28 03:52:56,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 459 transitions, 8562 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 03:52:56,694 INFO L231 Difference]: Finished difference. Result has 222 places, 397 transitions, 7862 flow [2024-06-28 03:52:56,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7862, PETRI_PLACES=222, PETRI_TRANSITIONS=397} [2024-06-28 03:52:56,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-28 03:52:56,695 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 397 transitions, 7862 flow [2024-06-28 03:52:56,695 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) [2024-06-28 03:52:56,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:56,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:52:56,696 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:56,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1015652635, now seen corresponding path program 1 times [2024-06-28 03:52:56,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:56,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619200145] [2024-06-28 03:52:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:59,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619200145] [2024-06-28 03:52:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619200145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:59,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444323557] [2024-06-28 03:52:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:59,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:59,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 397 transitions, 7862 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) [2024-06-28 03:52:59,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand