./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe018_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe018_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:13:36,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:13:36,584 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:13:36,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:13:36,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:13:36,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:13:36,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:13:36,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:13:36,622 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:13:36,626 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:13:36,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:13:36,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:13:36,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:13:36,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:13:36,629 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:13:36,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:13:36,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:13:36,629 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:13:36,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:13:36,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:13:36,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:13:36,631 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:13:36,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:13:36,631 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:13:36,631 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:13:36,632 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:13:36,632 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:13:36,632 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:13:36,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:13:36,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:13:36,634 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:13:36,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:13:36,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:13:36,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:13:36,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:13:36,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:13:36,635 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:13:36,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:13:36,635 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:13:36,636 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:13:36,636 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:13:36,636 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:13:36,636 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:13:36,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:13:36,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:13:36,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:13:36,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:13:36,907 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:13:36,907 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:13:36,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe018_rmo.oepc.yml/witness.yml [2024-06-20 17:13:37,207 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:13:37,208 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:13:37,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i [2024-06-20 17:13:38,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:13:38,628 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:13:38,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i [2024-06-20 17:13:38,650 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e865f22b9/e81cfc2ffb9a49a1a96904a672f889fe/FLAGd1bfc315b [2024-06-20 17:13:38,666 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e865f22b9/e81cfc2ffb9a49a1a96904a672f889fe [2024-06-20 17:13:38,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:13:38,668 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:13:38,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:13:38,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:13:38,676 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:13:38,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:13:37" (1/2) ... [2024-06-20 17:13:38,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3470fa55 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:13:38, skipping insertion in model container [2024-06-20 17:13:38,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:13:37" (1/2) ... [2024-06-20 17:13:38,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5df0f23d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:13:38, skipping insertion in model container [2024-06-20 17:13:38,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:13:38" (2/2) ... [2024-06-20 17:13:38,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3470fa55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:38, skipping insertion in model container [2024-06-20 17:13:38,679 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:13:38" (2/2) ... [2024-06-20 17:13:38,680 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:13:38,867 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:13:38,868 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 17:13:38,868 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 17:13:38,868 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 17:13:38,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:13:38,869 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-20 17:13:38,917 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:13:39,228 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:13:39,237 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:13:39,405 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:13:39,456 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:13:39,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39 WrapperNode [2024-06-20 17:13:39,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:13:39,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:13:39,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:13:39,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:13:39,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,546 INFO L138 Inliner]: procedures = 175, calls = 78, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-20 17:13:39,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:13:39,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:13:39,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:13:39,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:13:39,565 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,579 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,604 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-20 17:13:39,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,619 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:13:39,652 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:13:39,653 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:13:39,653 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:13:39,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (1/1) ... [2024-06-20 17:13:39,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:13:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:13:39,685 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) [2024-06-20 17:13:39,714 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 [2024-06-20 17:13:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:13:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:13:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:13:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:13:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:13:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:13:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:13:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:13:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:13:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:13:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:13:39,733 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:13:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:13:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:13:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:13:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:13:39,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:13:39,738 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:13:39,901 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:13:39,902 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:13:40,383 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:13:40,385 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:13:40,825 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:13:40,825 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:13:40,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:13:40 BoogieIcfgContainer [2024-06-20 17:13:40,825 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:13:40,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:13:40,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:13:40,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:13:40,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:13:37" (1/4) ... [2024-06-20 17:13:40,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaa853 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:13:40, skipping insertion in model container [2024-06-20 17:13:40,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:13:38" (2/4) ... [2024-06-20 17:13:40,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaa853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:13:40, skipping insertion in model container [2024-06-20 17:13:40,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:39" (3/4) ... [2024-06-20 17:13:40,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaa853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:13:40, skipping insertion in model container [2024-06-20 17:13:40,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:13:40" (4/4) ... [2024-06-20 17:13:40,835 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_rmo.oepc.i [2024-06-20 17:13:40,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:13:40,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:13:40,854 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:13:40,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:13:40,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:13:41,017 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 17:13:41,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:13:41,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:13:41,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:13:41,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 17:13:41,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:13:41,045 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;@34dd00fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:13:41,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:13:41,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:13:41,054 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 17:13:41,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:13:41,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:41,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:13:41,056 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)] === [2024-06-20 17:13:41,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 635865092, now seen corresponding path program 1 times [2024-06-20 17:13:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:41,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616749675] [2024-06-20 17:13:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:43,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616749675] [2024-06-20 17:13:43,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616749675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:43,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:43,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:13:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830189136] [2024-06-20 17:13:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:13:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:13:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:13:43,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:13:43,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:43,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:43,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:13:43,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:43,896 INFO L124 PetriNetUnfolderBase]: 602/990 cut-off events. [2024-06-20 17:13:43,896 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 17:13:43,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 990 events. 602/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4692 event pairs, 367 based on Foata normal form. 1/967 useless extension candidates. Maximal degree in co-relation 1965. Up to 930 conditions per place. [2024-06-20 17:13:43,907 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 17:13:43,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 175 flow [2024-06-20 17:13:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:13:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:13:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-20 17:13:43,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:13:43,920 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-20 17:13:43,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 175 flow [2024-06-20 17:13:43,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:13:43,925 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 17:13:43,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 17:13:43,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 17:13:43,929 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 17:13:43,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:43,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:43,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:13:43,931 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)] === [2024-06-20 17:13:43,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1181037251, now seen corresponding path program 1 times [2024-06-20 17:13:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:43,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996916468] [2024-06-20 17:13:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:43,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996916468] [2024-06-20 17:13:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996916468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:46,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:46,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:13:46,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043003951] [2024-06-20 17:13:46,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:46,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:13:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:13:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:13:46,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:13:46,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:46,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:46,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:13:46,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:47,109 INFO L124 PetriNetUnfolderBase]: 596/982 cut-off events. [2024-06-20 17:13:47,110 INFO L125 PetriNetUnfolderBase]: For 207/215 co-relation queries the response was YES. [2024-06-20 17:13:47,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 982 events. 596/982 cut-off events. For 207/215 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4634 event pairs, 277 based on Foata normal form. 6/986 useless extension candidates. Maximal degree in co-relation 2264. Up to 902 conditions per place. [2024-06-20 17:13:47,117 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-20 17:13:47,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 250 flow [2024-06-20 17:13:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:13:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:13:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-20 17:13:47,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 17:13:47,119 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 95 transitions. [2024-06-20 17:13:47,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 250 flow [2024-06-20 17:13:47,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:13:47,122 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 17:13:47,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 17:13:47,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 17:13:47,123 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 17:13:47,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:47,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:47,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:47,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:13:47,124 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)] === [2024-06-20 17:13:47,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -90045417, now seen corresponding path program 1 times [2024-06-20 17:13:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:47,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104583723] [2024-06-20 17:13:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:47,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104583723] [2024-06-20 17:13:50,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104583723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:50,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:50,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:13:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60884292] [2024-06-20 17:13:50,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:50,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:13:50,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:13:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:13:50,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:13:50,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:50,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:50,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:13:50,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:50,954 INFO L124 PetriNetUnfolderBase]: 754/1210 cut-off events. [2024-06-20 17:13:50,954 INFO L125 PetriNetUnfolderBase]: For 709/725 co-relation queries the response was YES. [2024-06-20 17:13:50,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1210 events. 754/1210 cut-off events. For 709/725 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5576 event pairs, 215 based on Foata normal form. 12/1220 useless extension candidates. Maximal degree in co-relation 3130. Up to 1079 conditions per place. [2024-06-20 17:13:50,965 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-20 17:13:50,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 374 flow [2024-06-20 17:13:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:13:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:13:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-20 17:13:50,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-20 17:13:50,972 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 131 transitions. [2024-06-20 17:13:50,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 374 flow [2024-06-20 17:13:50,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 354 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:13:50,974 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-20 17:13:50,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-20 17:13:50,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-20 17:13:50,975 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-20 17:13:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:50,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:50,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:50,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:13:50,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:50,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash 747373098, now seen corresponding path program 1 times [2024-06-20 17:13:50,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315354168] [2024-06-20 17:13:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:52,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:52,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315354168] [2024-06-20 17:13:52,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315354168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:52,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:52,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:13:52,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852371920] [2024-06-20 17:13:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:52,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:13:52,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:13:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:13:52,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:13:52,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:52,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:52,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:13:52,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:53,765 INFO L124 PetriNetUnfolderBase]: 868/1376 cut-off events. [2024-06-20 17:13:53,766 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2024-06-20 17:13:53,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3929 conditions, 1376 events. 868/1376 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6326 event pairs, 337 based on Foata normal form. 2/1377 useless extension candidates. Maximal degree in co-relation 3912. Up to 1311 conditions per place. [2024-06-20 17:13:53,776 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-20 17:13:53,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 352 flow [2024-06-20 17:13:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:13:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:13:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-20 17:13:53,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-20 17:13:53,779 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 88 transitions. [2024-06-20 17:13:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 352 flow [2024-06-20 17:13:53,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 321 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:13:53,785 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 211 flow [2024-06-20 17:13:53,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-20 17:13:53,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-20 17:13:53,787 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 211 flow [2024-06-20 17:13:53,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:53,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:53,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:53,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:13:53,788 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)] === [2024-06-20 17:13:53,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1389475007, now seen corresponding path program 1 times [2024-06-20 17:13:53,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:53,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099764468] [2024-06-20 17:13:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:56,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099764468] [2024-06-20 17:13:56,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099764468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:56,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:56,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:13:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988867415] [2024-06-20 17:13:56,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:56,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:13:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:13:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:13:56,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:13:56,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:56,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:56,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:13:56,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:57,930 INFO L124 PetriNetUnfolderBase]: 881/1391 cut-off events. [2024-06-20 17:13:57,930 INFO L125 PetriNetUnfolderBase]: For 1985/1985 co-relation queries the response was YES. [2024-06-20 17:13:57,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1391 events. 881/1391 cut-off events. For 1985/1985 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6399 event pairs, 320 based on Foata normal form. 2/1391 useless extension candidates. Maximal degree in co-relation 4281. Up to 1287 conditions per place. [2024-06-20 17:13:57,942 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-20 17:13:57,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 473 flow [2024-06-20 17:13:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:13:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:13:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 17:13:57,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:13:57,946 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 211 flow. Second operand 6 states and 112 transitions. [2024-06-20 17:13:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 473 flow [2024-06-20 17:13:57,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 469 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 17:13:57,956 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 296 flow [2024-06-20 17:13:57,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-20 17:13:57,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 17:13:57,959 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 296 flow [2024-06-20 17:13:57,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:57,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:57,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:57,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:13:57,960 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)] === [2024-06-20 17:13:57,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash -113426047, now seen corresponding path program 2 times [2024-06-20 17:13:57,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:57,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767295626] [2024-06-20 17:13:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:57,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:00,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:00,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767295626] [2024-06-20 17:14:00,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767295626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:00,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:00,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:00,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648382414] [2024-06-20 17:14:00,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:00,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:00,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:00,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:00,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:00,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:00,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:01,495 INFO L124 PetriNetUnfolderBase]: 876/1390 cut-off events. [2024-06-20 17:14:01,495 INFO L125 PetriNetUnfolderBase]: For 3068/3074 co-relation queries the response was YES. [2024-06-20 17:14:01,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 1390 events. 876/1390 cut-off events. For 3068/3074 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6425 event pairs, 324 based on Foata normal form. 8/1397 useless extension candidates. Maximal degree in co-relation 4714. Up to 1282 conditions per place. [2024-06-20 17:14:01,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-20 17:14:01,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 491 flow [2024-06-20 17:14:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:14:01,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 17:14:01,507 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 296 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:14:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 491 flow [2024-06-20 17:14:01,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 463 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:01,515 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 315 flow [2024-06-20 17:14:01,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-20 17:14:01,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 17:14:01,518 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 315 flow [2024-06-20 17:14:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:01,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:01,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:01,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:14:01,518 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)] === [2024-06-20 17:14:01,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1381646763, now seen corresponding path program 1 times [2024-06-20 17:14:01,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:01,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508786698] [2024-06-20 17:14:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:03,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:03,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508786698] [2024-06-20 17:14:03,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508786698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:03,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:03,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:03,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723597371] [2024-06-20 17:14:03,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:03,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:03,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:03,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:03,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:03,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:03,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:03,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:03,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:04,448 INFO L124 PetriNetUnfolderBase]: 868/1376 cut-off events. [2024-06-20 17:14:04,449 INFO L125 PetriNetUnfolderBase]: For 3542/3542 co-relation queries the response was YES. [2024-06-20 17:14:04,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 1376 events. 868/1376 cut-off events. For 3542/3542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6279 event pairs, 296 based on Foata normal form. 4/1379 useless extension candidates. Maximal degree in co-relation 4762. Up to 1289 conditions per place. [2024-06-20 17:14:04,459 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-20 17:14:04,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 521 flow [2024-06-20 17:14:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:14:04,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 17:14:04,461 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 315 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:14:04,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 521 flow [2024-06-20 17:14:04,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 497 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:04,467 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 332 flow [2024-06-20 17:14:04,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-20 17:14:04,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-20 17:14:04,469 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 332 flow [2024-06-20 17:14:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:04,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:04,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:14:04,470 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)] === [2024-06-20 17:14:04,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash 344115596, now seen corresponding path program 1 times [2024-06-20 17:14:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337212931] [2024-06-20 17:14:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:07,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:07,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337212931] [2024-06-20 17:14:07,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337212931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:07,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:07,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:07,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584722289] [2024-06-20 17:14:07,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:07,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:07,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:07,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:07,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:07,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:07,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:08,573 INFO L124 PetriNetUnfolderBase]: 886/1414 cut-off events. [2024-06-20 17:14:08,573 INFO L125 PetriNetUnfolderBase]: For 4613/4613 co-relation queries the response was YES. [2024-06-20 17:14:08,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5098 conditions, 1414 events. 886/1414 cut-off events. For 4613/4613 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6711 event pairs, 272 based on Foata normal form. 3/1416 useless extension candidates. Maximal degree in co-relation 5071. Up to 1283 conditions per place. [2024-06-20 17:14:08,581 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 72 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-20 17:14:08,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 622 flow [2024-06-20 17:14:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 17:14:08,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-20 17:14:08,583 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 332 flow. Second operand 7 states and 132 transitions. [2024-06-20 17:14:08,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 622 flow [2024-06-20 17:14:08,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 599 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:08,590 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 388 flow [2024-06-20 17:14:08,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-20 17:14:08,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-20 17:14:08,591 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 388 flow [2024-06-20 17:14:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:08,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:08,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:14:08,592 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)] === [2024-06-20 17:14:08,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash -294215418, now seen corresponding path program 2 times [2024-06-20 17:14:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:08,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490158241] [2024-06-20 17:14:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:11,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490158241] [2024-06-20 17:14:11,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490158241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:11,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:11,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842869236] [2024-06-20 17:14:11,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:11,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:11,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:11,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:11,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:11,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:11,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:11,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:12,504 INFO L124 PetriNetUnfolderBase]: 899/1431 cut-off events. [2024-06-20 17:14:12,504 INFO L125 PetriNetUnfolderBase]: For 5649/5649 co-relation queries the response was YES. [2024-06-20 17:14:12,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5590 conditions, 1431 events. 899/1431 cut-off events. For 5649/5649 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6723 event pairs, 294 based on Foata normal form. 2/1431 useless extension candidates. Maximal degree in co-relation 5562. Up to 1261 conditions per place. [2024-06-20 17:14:12,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-20 17:14:12,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 763 flow [2024-06-20 17:14:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:14:12,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 17:14:12,520 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 388 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:14:12,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 763 flow [2024-06-20 17:14:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 703 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:12,529 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 494 flow [2024-06-20 17:14:12,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-20 17:14:12,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-20 17:14:12,531 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 494 flow [2024-06-20 17:14:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:12,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:12,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:14:12,535 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)] === [2024-06-20 17:14:12,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 324422244, now seen corresponding path program 3 times [2024-06-20 17:14:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890209472] [2024-06-20 17:14:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:14,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:14,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890209472] [2024-06-20 17:14:14,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890209472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:14,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:14,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:14,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195687199] [2024-06-20 17:14:14,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:14,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:14,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:14,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:14,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 494 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:14,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:14,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:14,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:16,133 INFO L124 PetriNetUnfolderBase]: 894/1426 cut-off events. [2024-06-20 17:14:16,133 INFO L125 PetriNetUnfolderBase]: For 7398/7398 co-relation queries the response was YES. [2024-06-20 17:14:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5967 conditions, 1426 events. 894/1426 cut-off events. For 7398/7398 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6658 event pairs, 307 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 5936. Up to 1256 conditions per place. [2024-06-20 17:14:16,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-20 17:14:16,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 749 flow [2024-06-20 17:14:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:14:16,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 17:14:16,150 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 494 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:14:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 749 flow [2024-06-20 17:14:16,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 711 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 17:14:16,159 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 527 flow [2024-06-20 17:14:16,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-20 17:14:16,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-20 17:14:16,160 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 527 flow [2024-06-20 17:14:16,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:16,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:16,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:16,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:14:16,161 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)] === [2024-06-20 17:14:16,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1309830348, now seen corresponding path program 1 times [2024-06-20 17:14:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:16,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236890] [2024-06-20 17:14:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:16,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:18,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236890] [2024-06-20 17:14:18,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:18,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:18,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667797829] [2024-06-20 17:14:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:18,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:18,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:18,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:18,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:18,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:19,313 INFO L124 PetriNetUnfolderBase]: 960/1534 cut-off events. [2024-06-20 17:14:19,313 INFO L125 PetriNetUnfolderBase]: For 8909/8909 co-relation queries the response was YES. [2024-06-20 17:14:19,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6656 conditions, 1534 events. 960/1534 cut-off events. For 8909/8909 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7237 event pairs, 294 based on Foata normal form. 4/1536 useless extension candidates. Maximal degree in co-relation 6623. Up to 1362 conditions per place. [2024-06-20 17:14:19,324 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 88 selfloop transitions, 31 changer transitions 0/124 dead transitions. [2024-06-20 17:14:19,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 997 flow [2024-06-20 17:14:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:14:19,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:14:19,325 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 527 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:14:19,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 997 flow [2024-06-20 17:14:19,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 936 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:19,335 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 716 flow [2024-06-20 17:14:19,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-20 17:14:19,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-20 17:14:19,335 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 716 flow [2024-06-20 17:14:19,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:19,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:19,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:19,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:14:19,336 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)] === [2024-06-20 17:14:19,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2081375424, now seen corresponding path program 2 times [2024-06-20 17:14:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:19,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470619833] [2024-06-20 17:14:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470619833] [2024-06-20 17:14:21,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470619833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:21,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:21,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:21,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023606459] [2024-06-20 17:14:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:21,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:21,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:21,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:21,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:21,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:21,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:21,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:22,762 INFO L124 PetriNetUnfolderBase]: 980/1566 cut-off events. [2024-06-20 17:14:22,762 INFO L125 PetriNetUnfolderBase]: For 10732/10732 co-relation queries the response was YES. [2024-06-20 17:14:22,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7126 conditions, 1566 events. 980/1566 cut-off events. For 10732/10732 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7429 event pairs, 290 based on Foata normal form. 4/1568 useless extension candidates. Maximal degree in co-relation 7089. Up to 1368 conditions per place. [2024-06-20 17:14:22,776 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-20 17:14:22,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 1052 flow [2024-06-20 17:14:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:14:22,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:14:22,779 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 716 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:14:22,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 1052 flow [2024-06-20 17:14:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1008 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:22,793 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 771 flow [2024-06-20 17:14:22,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=771, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-20 17:14:22,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-20 17:14:22,794 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 771 flow [2024-06-20 17:14:22,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:22,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:22,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:22,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:14:22,795 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)] === [2024-06-20 17:14:22,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1716513112, now seen corresponding path program 3 times [2024-06-20 17:14:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943264811] [2024-06-20 17:14:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:22,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943264811] [2024-06-20 17:14:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943264811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:25,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:25,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:25,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398562930] [2024-06-20 17:14:25,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:25,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:25,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:25,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 771 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:25,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:25,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:25,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:26,427 INFO L124 PetriNetUnfolderBase]: 1000/1604 cut-off events. [2024-06-20 17:14:26,427 INFO L125 PetriNetUnfolderBase]: For 12984/12990 co-relation queries the response was YES. [2024-06-20 17:14:26,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7539 conditions, 1604 events. 1000/1604 cut-off events. For 12984/12990 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7687 event pairs, 300 based on Foata normal form. 10/1613 useless extension candidates. Maximal degree in co-relation 7501. Up to 1422 conditions per place. [2024-06-20 17:14:26,443 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 85 selfloop transitions, 30 changer transitions 0/120 dead transitions. [2024-06-20 17:14:26,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 1103 flow [2024-06-20 17:14:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:14:26,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 17:14:26,445 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 771 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:14:26,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 1103 flow [2024-06-20 17:14:26,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 1022 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:26,459 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 786 flow [2024-06-20 17:14:26,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-20 17:14:26,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-20 17:14:26,460 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 786 flow [2024-06-20 17:14:26,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:26,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:26,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:26,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:14:26,461 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)] === [2024-06-20 17:14:26,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash 672992488, now seen corresponding path program 4 times [2024-06-20 17:14:26,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:26,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157161162] [2024-06-20 17:14:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:26,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:28,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:28,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157161162] [2024-06-20 17:14:28,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157161162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:28,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:28,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:28,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337197614] [2024-06-20 17:14:28,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:28,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:28,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:28,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:28,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 786 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:28,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:28,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:28,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:29,849 INFO L124 PetriNetUnfolderBase]: 992/1592 cut-off events. [2024-06-20 17:14:29,849 INFO L125 PetriNetUnfolderBase]: For 12548/12554 co-relation queries the response was YES. [2024-06-20 17:14:29,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 1592 events. 992/1592 cut-off events. For 12548/12554 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7565 event pairs, 262 based on Foata normal form. 10/1601 useless extension candidates. Maximal degree in co-relation 7357. Up to 1312 conditions per place. [2024-06-20 17:14:29,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 81 selfloop transitions, 37 changer transitions 0/123 dead transitions. [2024-06-20 17:14:29,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1124 flow [2024-06-20 17:14:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:14:29,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:14:29,864 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 786 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:14:29,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1124 flow [2024-06-20 17:14:29,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 1052 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:29,883 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 823 flow [2024-06-20 17:14:29,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-20 17:14:29,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 17:14:29,885 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 823 flow [2024-06-20 17:14:29,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 17:14:29,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:29,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:14:29,886 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)] === [2024-06-20 17:14:29,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1254103241, now seen corresponding path program 1 times [2024-06-20 17:14:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:29,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320503050] [2024-06-20 17:14:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:29,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:32,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320503050] [2024-06-20 17:14:32,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320503050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:32,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:32,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902652835] [2024-06-20 17:14:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:32,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:32,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 823 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:32,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:32,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:34,243 INFO L124 PetriNetUnfolderBase]: 1210/1952 cut-off events. [2024-06-20 17:14:34,243 INFO L125 PetriNetUnfolderBase]: For 18547/18547 co-relation queries the response was YES. [2024-06-20 17:14:34,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9315 conditions, 1952 events. 1210/1952 cut-off events. For 18547/18547 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9859 event pairs, 245 based on Foata normal form. 18/1969 useless extension candidates. Maximal degree in co-relation 9275. Up to 1438 conditions per place. [2024-06-20 17:14:34,261 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-20 17:14:34,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1393 flow [2024-06-20 17:14:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:14:34,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:14:34,263 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 823 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:14:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1393 flow [2024-06-20 17:14:34,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1302 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:34,283 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 879 flow [2024-06-20 17:14:34,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-20 17:14:34,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-20 17:14:34,284 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 879 flow [2024-06-20 17:14:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:14:34,284 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)] === [2024-06-20 17:14:34,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash -17345429, now seen corresponding path program 2 times [2024-06-20 17:14:34,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:34,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619891158] [2024-06-20 17:14:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:34,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:37,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:37,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619891158] [2024-06-20 17:14:37,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619891158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:37,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:37,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890830743] [2024-06-20 17:14:37,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:37,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:37,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:37,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:37,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 879 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:37,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:37,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:37,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:38,557 INFO L124 PetriNetUnfolderBase]: 1164/1882 cut-off events. [2024-06-20 17:14:38,557 INFO L125 PetriNetUnfolderBase]: For 18959/18959 co-relation queries the response was YES. [2024-06-20 17:14:38,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 1882 events. 1164/1882 cut-off events. For 18959/18959 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9509 event pairs, 312 based on Foata normal form. 24/1905 useless extension candidates. Maximal degree in co-relation 8889. Up to 1574 conditions per place. [2024-06-20 17:14:38,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-20 17:14:38,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 144 transitions, 1306 flow [2024-06-20 17:14:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 17:14:38,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-20 17:14:38,574 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 879 flow. Second operand 8 states and 151 transitions. [2024-06-20 17:14:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 144 transitions, 1306 flow [2024-06-20 17:14:38,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1241 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:38,600 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 899 flow [2024-06-20 17:14:38,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-20 17:14:38,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-20 17:14:38,601 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 899 flow [2024-06-20 17:14:38,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:38,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:38,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:38,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:14:38,602 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)] === [2024-06-20 17:14:38,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 97945741, now seen corresponding path program 3 times [2024-06-20 17:14:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:38,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911985662] [2024-06-20 17:14:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:41,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911985662] [2024-06-20 17:14:41,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911985662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:41,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:41,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518485111] [2024-06-20 17:14:41,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:41,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:41,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 899 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:41,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:41,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:41,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:43,215 INFO L124 PetriNetUnfolderBase]: 1232/2006 cut-off events. [2024-06-20 17:14:43,215 INFO L125 PetriNetUnfolderBase]: For 20148/20148 co-relation queries the response was YES. [2024-06-20 17:14:43,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 2006 events. 1232/2006 cut-off events. For 20148/20148 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10422 event pairs, 336 based on Foata normal form. 16/2020 useless extension candidates. Maximal degree in co-relation 9424. Up to 1654 conditions per place. [2024-06-20 17:14:43,231 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 37 changer transitions 0/142 dead transitions. [2024-06-20 17:14:43,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1313 flow [2024-06-20 17:14:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:14:43,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 17:14:43,235 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 899 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:14:43,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1313 flow [2024-06-20 17:14:43,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1263 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:43,263 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 950 flow [2024-06-20 17:14:43,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-06-20 17:14:43,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 17:14:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 950 flow [2024-06-20 17:14:43,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:43,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:14:43,265 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)] === [2024-06-20 17:14:43,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash 727057895, now seen corresponding path program 1 times [2024-06-20 17:14:43,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985596502] [2024-06-20 17:14:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:46,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:46,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985596502] [2024-06-20 17:14:46,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985596502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:46,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:46,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:46,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052591176] [2024-06-20 17:14:46,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:46,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:46,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:46,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:46,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 950 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:46,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:46,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:46,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:47,518 INFO L124 PetriNetUnfolderBase]: 1280/2090 cut-off events. [2024-06-20 17:14:47,518 INFO L125 PetriNetUnfolderBase]: For 22474/22474 co-relation queries the response was YES. [2024-06-20 17:14:47,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9988 conditions, 2090 events. 1280/2090 cut-off events. For 22474/22474 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10987 event pairs, 326 based on Foata normal form. 12/2100 useless extension candidates. Maximal degree in co-relation 9943. Up to 1482 conditions per place. [2024-06-20 17:14:47,533 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 40 changer transitions 0/146 dead transitions. [2024-06-20 17:14:47,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 1386 flow [2024-06-20 17:14:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:14:47,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 17:14:47,535 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 950 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:14:47,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 1386 flow [2024-06-20 17:14:47,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1305 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:47,565 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 978 flow [2024-06-20 17:14:47,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-06-20 17:14:47,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-20 17:14:47,566 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 978 flow [2024-06-20 17:14:47,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:47,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:47,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:14:47,567 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)] === [2024-06-20 17:14:47,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1762787517, now seen corresponding path program 4 times [2024-06-20 17:14:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966077843] [2024-06-20 17:14:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:50,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:50,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966077843] [2024-06-20 17:14:50,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966077843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:50,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:50,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:50,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134893857] [2024-06-20 17:14:50,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:50,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:50,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:50,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:50,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:50,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:50,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 978 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:50,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:50,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:50,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:51,831 INFO L124 PetriNetUnfolderBase]: 1320/2174 cut-off events. [2024-06-20 17:14:51,831 INFO L125 PetriNetUnfolderBase]: For 25264/25264 co-relation queries the response was YES. [2024-06-20 17:14:51,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 2174 events. 1320/2174 cut-off events. For 25264/25264 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11647 event pairs, 375 based on Foata normal form. 16/2188 useless extension candidates. Maximal degree in co-relation 10292. Up to 1810 conditions per place. [2024-06-20 17:14:51,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-20 17:14:51,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 140 transitions, 1382 flow [2024-06-20 17:14:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:14:51,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 17:14:51,850 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 978 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:14:51,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 140 transitions, 1382 flow [2024-06-20 17:14:51,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 140 transitions, 1304 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:51,877 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 1003 flow [2024-06-20 17:14:51,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2024-06-20 17:14:51,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 17:14:51,878 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 1003 flow [2024-06-20 17:14:51,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:51,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:51,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:51,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:14:51,878 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)] === [2024-06-20 17:14:51,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 208467247, now seen corresponding path program 2 times [2024-06-20 17:14:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:51,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037481588] [2024-06-20 17:14:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037481588] [2024-06-20 17:14:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037481588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:54,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5778034] [2024-06-20 17:14:54,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:54,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:54,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:54,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:54,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:54,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:54,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:55,933 INFO L124 PetriNetUnfolderBase]: 1368/2270 cut-off events. [2024-06-20 17:14:55,933 INFO L125 PetriNetUnfolderBase]: For 27067/27067 co-relation queries the response was YES. [2024-06-20 17:14:55,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 2270 events. 1368/2270 cut-off events. For 27067/27067 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12399 event pairs, 375 based on Foata normal form. 12/2280 useless extension candidates. Maximal degree in co-relation 10725. Up to 1784 conditions per place. [2024-06-20 17:14:55,955 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 37 changer transitions 0/145 dead transitions. [2024-06-20 17:14:55,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1435 flow [2024-06-20 17:14:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:14:55,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:14:55,957 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 1003 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:14:55,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1435 flow [2024-06-20 17:14:55,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 145 transitions, 1352 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:55,990 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 1026 flow [2024-06-20 17:14:55,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-06-20 17:14:55,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-20 17:14:55,991 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 1026 flow [2024-06-20 17:14:55,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:55,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:55,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:55,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:14:55,992 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)] === [2024-06-20 17:14:55,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash -612067865, now seen corresponding path program 3 times [2024-06-20 17:14:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:55,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318052516] [2024-06-20 17:14:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:55,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:58,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:58,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318052516] [2024-06-20 17:14:58,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318052516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:58,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:58,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:58,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885743298] [2024-06-20 17:14:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:58,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:14:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:59,965 INFO L124 PetriNetUnfolderBase]: 1348/2238 cut-off events. [2024-06-20 17:14:59,965 INFO L125 PetriNetUnfolderBase]: For 26673/26673 co-relation queries the response was YES. [2024-06-20 17:14:59,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10452 conditions, 2238 events. 1348/2238 cut-off events. For 26673/26673 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12112 event pairs, 310 based on Foata normal form. 12/2248 useless extension candidates. Maximal degree in co-relation 10404. Up to 1250 conditions per place. [2024-06-20 17:14:59,976 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-06-20 17:14:59,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 144 transitions, 1388 flow [2024-06-20 17:14:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:14:59,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:14:59,978 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 1026 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:14:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 144 transitions, 1388 flow [2024-06-20 17:15:00,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 144 transitions, 1298 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:00,006 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 990 flow [2024-06-20 17:15:00,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2024-06-20 17:15:00,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 17:15:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 990 flow [2024-06-20 17:15:00,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-20 17:15:00,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:00,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:15:00,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:00,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1549459376, now seen corresponding path program 1 times [2024-06-20 17:15:00,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:00,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114934088] [2024-06-20 17:15:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:00,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:01,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114934088] [2024-06-20 17:15:01,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114934088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:01,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:01,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:15:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554325952] [2024-06-20 17:15:01,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:01,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:15:01,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:15:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:15:01,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:15:01,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 990 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:01,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:01,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:15:01,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:02,556 INFO L124 PetriNetUnfolderBase]: 1215/2070 cut-off events. [2024-06-20 17:15:02,556 INFO L125 PetriNetUnfolderBase]: For 25216/25216 co-relation queries the response was YES. [2024-06-20 17:15:02,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9736 conditions, 2070 events. 1215/2070 cut-off events. For 25216/25216 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11583 event pairs, 356 based on Foata normal form. 2/2046 useless extension candidates. Maximal degree in co-relation 9687. Up to 1893 conditions per place. [2024-06-20 17:15:02,569 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 10 changer transitions 0/120 dead transitions. [2024-06-20 17:15:02,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1242 flow [2024-06-20 17:15:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:15:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:15:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-20 17:15:02,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-20 17:15:02,570 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 990 flow. Second operand 5 states and 88 transitions. [2024-06-20 17:15:02,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1242 flow [2024-06-20 17:15:02,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 120 transitions, 1134 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:02,592 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 932 flow [2024-06-20 17:15:02,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=932, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-06-20 17:15:02,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-20 17:15:02,592 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 932 flow [2024-06-20 17:15:02,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:02,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:02,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:02,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:15:02,593 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:02,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1589325925, now seen corresponding path program 1 times [2024-06-20 17:15:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:02,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849800184] [2024-06-20 17:15:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849800184] [2024-06-20 17:15:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849800184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:04,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:04,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:15:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888526950] [2024-06-20 17:15:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:15:04,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:15:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:15:04,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:04,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 932 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) [2024-06-20 17:15:04,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:04,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:04,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:05,283 INFO L124 PetriNetUnfolderBase]: 1347/2242 cut-off events. [2024-06-20 17:15:05,283 INFO L125 PetriNetUnfolderBase]: For 25859/25859 co-relation queries the response was YES. [2024-06-20 17:15:05,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10453 conditions, 2242 events. 1347/2242 cut-off events. For 25859/25859 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12334 event pairs, 373 based on Foata normal form. 1/2241 useless extension candidates. Maximal degree in co-relation 10403. Up to 2102 conditions per place. [2024-06-20 17:15:05,297 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2024-06-20 17:15:05,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 1334 flow [2024-06-20 17:15:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:15:05,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-20 17:15:05,299 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 932 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:15:05,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 1334 flow [2024-06-20 17:15:05,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 131 transitions, 1306 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:05,319 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1012 flow [2024-06-20 17:15:05,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1012, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-06-20 17:15:05,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 17:15:05,320 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1012 flow [2024-06-20 17:15:05,320 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) [2024-06-20 17:15:05,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:05,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:05,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:15:05,321 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:05,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:05,321 INFO L85 PathProgramCache]: Analyzing trace with hash -775199625, now seen corresponding path program 2 times [2024-06-20 17:15:05,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:05,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121888593] [2024-06-20 17:15:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:05,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:07,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121888593] [2024-06-20 17:15:07,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121888593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:07,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:07,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:15:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699313712] [2024-06-20 17:15:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:07,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:15:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:15:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:15:07,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:07,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1012 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) [2024-06-20 17:15:07,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:07,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:07,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:07,930 INFO L124 PetriNetUnfolderBase]: 1344/2238 cut-off events. [2024-06-20 17:15:07,930 INFO L125 PetriNetUnfolderBase]: For 28351/28351 co-relation queries the response was YES. [2024-06-20 17:15:07,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 2238 events. 1344/2238 cut-off events. For 28351/28351 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12308 event pairs, 373 based on Foata normal form. 1/2237 useless extension candidates. Maximal degree in co-relation 10671. Up to 2102 conditions per place. [2024-06-20 17:15:07,944 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 13 changer transitions 0/129 dead transitions. [2024-06-20 17:15:07,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 129 transitions, 1300 flow [2024-06-20 17:15:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:15:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:15:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-20 17:15:07,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-20 17:15:07,946 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1012 flow. Second operand 5 states and 88 transitions. [2024-06-20 17:15:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 129 transitions, 1300 flow [2024-06-20 17:15:07,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 129 transitions, 1248 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-20 17:15:07,969 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 996 flow [2024-06-20 17:15:07,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=996, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-20 17:15:07,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 17:15:07,970 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 996 flow [2024-06-20 17:15:07,970 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) [2024-06-20 17:15:07,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:07,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:07,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:15:07,971 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:07,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1669333009, now seen corresponding path program 1 times [2024-06-20 17:15:07,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:07,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218451353] [2024-06-20 17:15:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:07,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:10,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:10,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218451353] [2024-06-20 17:15:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218451353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:10,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:10,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:10,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532538030] [2024-06-20 17:15:10,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:10,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:10,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:10,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:15:10,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 996 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:10,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:10,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:15:10,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:11,795 INFO L124 PetriNetUnfolderBase]: 1274/2160 cut-off events. [2024-06-20 17:15:11,796 INFO L125 PetriNetUnfolderBase]: For 31680/31680 co-relation queries the response was YES. [2024-06-20 17:15:11,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10534 conditions, 2160 events. 1274/2160 cut-off events. For 31680/31680 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12118 event pairs, 347 based on Foata normal form. 4/2136 useless extension candidates. Maximal degree in co-relation 10481. Up to 1894 conditions per place. [2024-06-20 17:15:11,807 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-20 17:15:11,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 151 transitions, 1459 flow [2024-06-20 17:15:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:15:11,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:15:11,809 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 996 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:15:11,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 151 transitions, 1459 flow [2024-06-20 17:15:11,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1433 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:11,831 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 1124 flow [2024-06-20 17:15:11,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1124, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-06-20 17:15:11,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-20 17:15:11,831 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 1124 flow [2024-06-20 17:15:11,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:11,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:11,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:11,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:15:11,832 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:11,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1738432627, now seen corresponding path program 2 times [2024-06-20 17:15:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:11,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528710989] [2024-06-20 17:15:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:14,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528710989] [2024-06-20 17:15:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528710989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:14,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846863319] [2024-06-20 17:15:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:14,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:15:14,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 1124 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:14,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:14,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:15:14,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:15,215 INFO L124 PetriNetUnfolderBase]: 1262/2144 cut-off events. [2024-06-20 17:15:15,215 INFO L125 PetriNetUnfolderBase]: For 33592/33592 co-relation queries the response was YES. [2024-06-20 17:15:15,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 2144 events. 1262/2144 cut-off events. For 33592/33592 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12009 event pairs, 345 based on Foata normal form. 4/2120 useless extension candidates. Maximal degree in co-relation 10735. Up to 1886 conditions per place. [2024-06-20 17:15:15,229 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-20 17:15:15,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 147 transitions, 1444 flow [2024-06-20 17:15:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 17:15:15,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:15:15,231 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 1124 flow. Second operand 6 states and 110 transitions. [2024-06-20 17:15:15,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 147 transitions, 1444 flow [2024-06-20 17:15:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 1400 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 17:15:15,257 INFO L231 Difference]: Finished difference. Result has 121 places, 126 transitions, 1146 flow [2024-06-20 17:15:15,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=121, PETRI_TRANSITIONS=126} [2024-06-20 17:15:15,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-20 17:15:15,258 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 126 transitions, 1146 flow [2024-06-20 17:15:15,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:15,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:15,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:15,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:15:15,259 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)] === [2024-06-20 17:15:15,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1738818577, now seen corresponding path program 3 times [2024-06-20 17:15:15,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:15,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045096607] [2024-06-20 17:15:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:17,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045096607] [2024-06-20 17:15:17,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045096607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:17,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:17,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:17,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208071327] [2024-06-20 17:15:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:17,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:17,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:15:17,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 126 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:17,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:17,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:15:17,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:18,626 INFO L124 PetriNetUnfolderBase]: 1251/2126 cut-off events. [2024-06-20 17:15:18,626 INFO L125 PetriNetUnfolderBase]: For 34941/34942 co-relation queries the response was YES. [2024-06-20 17:15:18,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10734 conditions, 2126 events. 1251/2126 cut-off events. For 34941/34942 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11950 event pairs, 351 based on Foata normal form. 4/2104 useless extension candidates. Maximal degree in co-relation 10678. Up to 1860 conditions per place. [2024-06-20 17:15:18,639 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 94 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-20 17:15:18,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 1464 flow [2024-06-20 17:15:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:15:18,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 17:15:18,640 INFO L175 Difference]: Start difference. First operand has 121 places, 126 transitions, 1146 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:15:18,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 1464 flow [2024-06-20 17:15:18,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 143 transitions, 1403 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:18,668 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1187 flow [2024-06-20 17:15:18,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1187, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-06-20 17:15:18,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-20 17:15:18,669 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1187 flow [2024-06-20 17:15:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:18,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:18,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:15:18,670 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:18,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2024465157, now seen corresponding path program 1 times [2024-06-20 17:15:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:18,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632499808] [2024-06-20 17:15:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632499808] [2024-06-20 17:15:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632499808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779218626] [2024-06-20 17:15:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:20,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:20,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1187 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) [2024-06-20 17:15:20,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:20,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:20,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:22,011 INFO L124 PetriNetUnfolderBase]: 1392/2316 cut-off events. [2024-06-20 17:15:22,011 INFO L125 PetriNetUnfolderBase]: For 35374/35374 co-relation queries the response was YES. [2024-06-20 17:15:22,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11839 conditions, 2316 events. 1392/2316 cut-off events. For 35374/35374 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12724 event pairs, 369 based on Foata normal form. 2/2316 useless extension candidates. Maximal degree in co-relation 11783. Up to 2142 conditions per place. [2024-06-20 17:15:22,025 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 23 changer transitions 0/155 dead transitions. [2024-06-20 17:15:22,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 155 transitions, 1653 flow [2024-06-20 17:15:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:15:22,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-20 17:15:22,027 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1187 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:15:22,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 155 transitions, 1653 flow [2024-06-20 17:15:22,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:22,061 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1229 flow [2024-06-20 17:15:22,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-20 17:15:22,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-20 17:15:22,062 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1229 flow [2024-06-20 17:15:22,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:22,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:22,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:22,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:15:22,063 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:22,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1738824529, now seen corresponding path program 2 times [2024-06-20 17:15:22,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:22,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986815698] [2024-06-20 17:15:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:22,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:24,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986815698] [2024-06-20 17:15:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986815698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:24,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:24,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362313328] [2024-06-20 17:15:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:24,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:24,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:24,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1229 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) [2024-06-20 17:15:24,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:24,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:24,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:25,206 INFO L124 PetriNetUnfolderBase]: 1402/2330 cut-off events. [2024-06-20 17:15:25,206 INFO L125 PetriNetUnfolderBase]: For 38261/38261 co-relation queries the response was YES. [2024-06-20 17:15:25,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 2330 events. 1402/2330 cut-off events. For 38261/38261 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12792 event pairs, 368 based on Foata normal form. 2/2330 useless extension candidates. Maximal degree in co-relation 12080. Up to 2161 conditions per place. [2024-06-20 17:15:25,222 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 132 selfloop transitions, 22 changer transitions 0/159 dead transitions. [2024-06-20 17:15:25,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 1681 flow [2024-06-20 17:15:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:15:25,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:15:25,224 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1229 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:15:25,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 159 transitions, 1681 flow [2024-06-20 17:15:25,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 159 transitions, 1637 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:25,259 INFO L231 Difference]: Finished difference. Result has 129 places, 138 transitions, 1273 flow [2024-06-20 17:15:25,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2024-06-20 17:15:25,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 17:15:25,260 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 1273 flow [2024-06-20 17:15:25,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:25,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:25,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:25,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:15:25,260 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:25,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:25,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1738617139, now seen corresponding path program 3 times [2024-06-20 17:15:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:25,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158928414] [2024-06-20 17:15:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:25,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158928414] [2024-06-20 17:15:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158928414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:27,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:27,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:27,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217616885] [2024-06-20 17:15:27,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:27,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:27,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 1273 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) [2024-06-20 17:15:27,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:27,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:27,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:28,217 INFO L124 PetriNetUnfolderBase]: 1396/2322 cut-off events. [2024-06-20 17:15:28,217 INFO L125 PetriNetUnfolderBase]: For 39869/39869 co-relation queries the response was YES. [2024-06-20 17:15:28,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12159 conditions, 2322 events. 1396/2322 cut-off events. For 39869/39869 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12761 event pairs, 369 based on Foata normal form. 2/2322 useless extension candidates. Maximal degree in co-relation 12100. Up to 2156 conditions per place. [2024-06-20 17:15:28,230 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-06-20 17:15:28,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 156 transitions, 1623 flow [2024-06-20 17:15:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:15:28,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:15:28,233 INFO L175 Difference]: Start difference. First operand has 129 places, 138 transitions, 1273 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:15:28,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 156 transitions, 1623 flow [2024-06-20 17:15:28,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 156 transitions, 1525 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:28,274 INFO L231 Difference]: Finished difference. Result has 129 places, 138 transitions, 1223 flow [2024-06-20 17:15:28,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1223, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2024-06-20 17:15:28,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 17:15:28,274 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 1223 flow [2024-06-20 17:15:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:28,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:28,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:28,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:15:28,275 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:28,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1738832465, now seen corresponding path program 1 times [2024-06-20 17:15:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:28,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931242429] [2024-06-20 17:15:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:30,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931242429] [2024-06-20 17:15:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931242429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:30,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231003309] [2024-06-20 17:15:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:30,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:15:30,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 1223 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:30,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:30,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:15:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:31,762 INFO L124 PetriNetUnfolderBase]: 1252/2140 cut-off events. [2024-06-20 17:15:31,762 INFO L125 PetriNetUnfolderBase]: For 40379/40379 co-relation queries the response was YES. [2024-06-20 17:15:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 2140 events. 1252/2140 cut-off events. For 40379/40379 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12030 event pairs, 348 based on Foata normal form. 2/2116 useless extension candidates. Maximal degree in co-relation 11223. Up to 1938 conditions per place. [2024-06-20 17:15:31,775 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-06-20 17:15:31,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 153 transitions, 1555 flow [2024-06-20 17:15:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:15:31,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-20 17:15:31,776 INFO L175 Difference]: Start difference. First operand has 129 places, 138 transitions, 1223 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:15:31,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 153 transitions, 1555 flow [2024-06-20 17:15:31,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 153 transitions, 1513 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:31,811 INFO L231 Difference]: Finished difference. Result has 130 places, 140 transitions, 1242 flow [2024-06-20 17:15:31,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1242, PETRI_PLACES=130, PETRI_TRANSITIONS=140} [2024-06-20 17:15:31,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-20 17:15:31,812 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 140 transitions, 1242 flow [2024-06-20 17:15:31,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:31,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:31,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:31,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:15:31,813 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:31,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1782389652, now seen corresponding path program 1 times [2024-06-20 17:15:31,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:31,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052649636] [2024-06-20 17:15:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:31,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052649636] [2024-06-20 17:15:34,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052649636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:34,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:34,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:34,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672189571] [2024-06-20 17:15:34,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:34,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:34,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:34,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:34,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:34,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 140 transitions, 1242 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) [2024-06-20 17:15:34,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:34,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:34,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:35,662 INFO L124 PetriNetUnfolderBase]: 1404/2330 cut-off events. [2024-06-20 17:15:35,663 INFO L125 PetriNetUnfolderBase]: For 43880/43880 co-relation queries the response was YES. [2024-06-20 17:15:35,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 2330 events. 1404/2330 cut-off events. For 43880/43880 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12740 event pairs, 366 based on Foata normal form. 1/2329 useless extension candidates. Maximal degree in co-relation 12287. Up to 2088 conditions per place. [2024-06-20 17:15:35,678 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-20 17:15:35,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 1892 flow [2024-06-20 17:15:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:15:35,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-20 17:15:35,680 INFO L175 Difference]: Start difference. First operand has 130 places, 140 transitions, 1242 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:15:35,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 1892 flow [2024-06-20 17:15:35,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 175 transitions, 1847 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:35,724 INFO L231 Difference]: Finished difference. Result has 133 places, 149 transitions, 1419 flow [2024-06-20 17:15:35,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1419, PETRI_PLACES=133, PETRI_TRANSITIONS=149} [2024-06-20 17:15:35,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 17:15:35,725 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 149 transitions, 1419 flow [2024-06-20 17:15:35,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:35,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:35,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:35,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:15:35,725 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:35,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:35,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1782509622, now seen corresponding path program 2 times [2024-06-20 17:15:35,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840671515] [2024-06-20 17:15:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:38,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840671515] [2024-06-20 17:15:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840671515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007105468] [2024-06-20 17:15:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:38,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:38,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:38,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 149 transitions, 1419 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) [2024-06-20 17:15:38,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:38,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:38,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:39,455 INFO L124 PetriNetUnfolderBase]: 1414/2356 cut-off events. [2024-06-20 17:15:39,455 INFO L125 PetriNetUnfolderBase]: For 47720/47720 co-relation queries the response was YES. [2024-06-20 17:15:39,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12834 conditions, 2356 events. 1414/2356 cut-off events. For 47720/47720 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12993 event pairs, 361 based on Foata normal form. 1/2356 useless extension candidates. Maximal degree in co-relation 12772. Up to 2140 conditions per place. [2024-06-20 17:15:39,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2024-06-20 17:15:39,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 1905 flow [2024-06-20 17:15:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:15:39,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:15:39,473 INFO L175 Difference]: Start difference. First operand has 133 places, 149 transitions, 1419 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:15:39,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 1905 flow [2024-06-20 17:15:39,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 177 transitions, 1829 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-20 17:15:39,519 INFO L231 Difference]: Finished difference. Result has 138 places, 155 transitions, 1496 flow [2024-06-20 17:15:39,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1496, PETRI_PLACES=138, PETRI_TRANSITIONS=155} [2024-06-20 17:15:39,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 17:15:39,520 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 155 transitions, 1496 flow [2024-06-20 17:15:39,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:39,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:39,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:39,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:15:39,520 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:39,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -70591972, now seen corresponding path program 3 times [2024-06-20 17:15:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:39,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908087094] [2024-06-20 17:15:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:39,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908087094] [2024-06-20 17:15:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908087094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:42,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:42,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:42,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825993857] [2024-06-20 17:15:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:42,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:42,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:42,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:42,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 155 transitions, 1496 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) [2024-06-20 17:15:42,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:42,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:42,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:43,220 INFO L124 PetriNetUnfolderBase]: 1419/2361 cut-off events. [2024-06-20 17:15:43,220 INFO L125 PetriNetUnfolderBase]: For 50709/50715 co-relation queries the response was YES. [2024-06-20 17:15:43,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12954 conditions, 2361 events. 1419/2361 cut-off events. For 50709/50715 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12970 event pairs, 368 based on Foata normal form. 7/2367 useless extension candidates. Maximal degree in co-relation 12890. Up to 2107 conditions per place. [2024-06-20 17:15:43,237 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-20 17:15:43,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 2080 flow [2024-06-20 17:15:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:15:43,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 17:15:43,238 INFO L175 Difference]: Start difference. First operand has 138 places, 155 transitions, 1496 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:15:43,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 2080 flow [2024-06-20 17:15:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 181 transitions, 2004 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:43,294 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1565 flow [2024-06-20 17:15:43,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-20 17:15:43,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-20 17:15:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1565 flow [2024-06-20 17:15:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:43,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:43,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:15:43,295 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:43,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1195764426, now seen corresponding path program 4 times [2024-06-20 17:15:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149767239] [2024-06-20 17:15:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:43,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:45,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:45,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149767239] [2024-06-20 17:15:45,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149767239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:45,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:45,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:45,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103927126] [2024-06-20 17:15:45,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:45,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:45,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:45,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:45,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1565 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) [2024-06-20 17:15:45,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:45,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:45,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:46,947 INFO L124 PetriNetUnfolderBase]: 1424/2368 cut-off events. [2024-06-20 17:15:46,947 INFO L125 PetriNetUnfolderBase]: For 53453/53459 co-relation queries the response was YES. [2024-06-20 17:15:46,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13160 conditions, 2368 events. 1424/2368 cut-off events. For 53453/53459 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13044 event pairs, 368 based on Foata normal form. 7/2374 useless extension candidates. Maximal degree in co-relation 13095. Up to 2113 conditions per place. [2024-06-20 17:15:46,964 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 120 selfloop transitions, 54 changer transitions 0/179 dead transitions. [2024-06-20 17:15:46,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 179 transitions, 2075 flow [2024-06-20 17:15:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:15:46,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-20 17:15:46,965 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1565 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:15:46,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 179 transitions, 2075 flow [2024-06-20 17:15:47,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 179 transitions, 1917 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:47,027 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1567 flow [2024-06-20 17:15:47,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1567, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-20 17:15:47,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 17:15:47,027 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1567 flow [2024-06-20 17:15:47,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:47,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:47,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:15:47,028 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:47,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1937454666, now seen corresponding path program 5 times [2024-06-20 17:15:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:47,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507540330] [2024-06-20 17:15:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:49,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:49,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507540330] [2024-06-20 17:15:49,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507540330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:49,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:49,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788312241] [2024-06-20 17:15:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:49,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:49,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:49,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1567 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) [2024-06-20 17:15:49,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:49,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:49,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:50,410 INFO L124 PetriNetUnfolderBase]: 1421/2358 cut-off events. [2024-06-20 17:15:50,410 INFO L125 PetriNetUnfolderBase]: For 55310/55310 co-relation queries the response was YES. [2024-06-20 17:15:50,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13098 conditions, 2358 events. 1421/2358 cut-off events. For 55310/55310 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12948 event pairs, 379 based on Foata normal form. 1/2357 useless extension candidates. Maximal degree in co-relation 13033. Up to 2076 conditions per place. [2024-06-20 17:15:50,424 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 58 changer transitions 0/182 dead transitions. [2024-06-20 17:15:50,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 182 transitions, 2051 flow [2024-06-20 17:15:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 17:15:50,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:15:50,426 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1567 flow. Second operand 6 states and 110 transitions. [2024-06-20 17:15:50,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 182 transitions, 2051 flow [2024-06-20 17:15:50,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 182 transitions, 1939 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:50,472 INFO L231 Difference]: Finished difference. Result has 143 places, 161 transitions, 1584 flow [2024-06-20 17:15:50,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1584, PETRI_PLACES=143, PETRI_TRANSITIONS=161} [2024-06-20 17:15:50,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-20 17:15:50,472 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1584 flow [2024-06-20 17:15:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:50,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:50,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:50,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:15:50,473 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:50,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1943168586, now seen corresponding path program 6 times [2024-06-20 17:15:50,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:50,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669657333] [2024-06-20 17:15:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:50,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:53,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669657333] [2024-06-20 17:15:53,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669657333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:53,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:53,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:53,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291862666] [2024-06-20 17:15:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:53,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:53,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:53,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 161 transitions, 1584 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) [2024-06-20 17:15:53,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:53,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:54,409 INFO L124 PetriNetUnfolderBase]: 1418/2358 cut-off events. [2024-06-20 17:15:54,409 INFO L125 PetriNetUnfolderBase]: For 57537/57537 co-relation queries the response was YES. [2024-06-20 17:15:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13154 conditions, 2358 events. 1418/2358 cut-off events. For 57537/57537 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12969 event pairs, 359 based on Foata normal form. 1/2358 useless extension candidates. Maximal degree in co-relation 13088. Up to 2073 conditions per place. [2024-06-20 17:15:54,425 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 60 changer transitions 0/195 dead transitions. [2024-06-20 17:15:54,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 195 transitions, 2066 flow [2024-06-20 17:15:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:15:54,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:15:54,427 INFO L175 Difference]: Start difference. First operand has 143 places, 161 transitions, 1584 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:15:54,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 195 transitions, 2066 flow [2024-06-20 17:15:54,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 195 transitions, 1881 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:15:54,497 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1552 flow [2024-06-20 17:15:54,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1552, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2024-06-20 17:15:54,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-20 17:15:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1552 flow [2024-06-20 17:15:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:54,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:54,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:15:54,499 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1308841324, now seen corresponding path program 1 times [2024-06-20 17:15:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746509716] [2024-06-20 17:15:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:56,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746509716] [2024-06-20 17:15:56,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746509716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:56,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:56,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:56,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284130560] [2024-06-20 17:15:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:56,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:56,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:56,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:56,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1552 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) [2024-06-20 17:15:56,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:56,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:56,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:57,522 INFO L124 PetriNetUnfolderBase]: 1426/2362 cut-off events. [2024-06-20 17:15:57,523 INFO L125 PetriNetUnfolderBase]: For 58199/58199 co-relation queries the response was YES. [2024-06-20 17:15:57,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13242 conditions, 2362 events. 1426/2362 cut-off events. For 58199/58199 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12917 event pairs, 331 based on Foata normal form. 2/2362 useless extension candidates. Maximal degree in co-relation 13176. Up to 2175 conditions per place. [2024-06-20 17:15:57,537 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-06-20 17:15:57,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 188 transitions, 2112 flow [2024-06-20 17:15:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:15:57,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-20 17:15:57,539 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1552 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:15:57,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 188 transitions, 2112 flow [2024-06-20 17:15:57,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 1973 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:15:57,595 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1532 flow [2024-06-20 17:15:57,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1532, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-20 17:15:57,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-20 17:15:57,596 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1532 flow [2024-06-20 17:15:57,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:57,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:57,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:57,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:15:57,596 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:57,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2106365222, now seen corresponding path program 2 times [2024-06-20 17:15:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:57,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975209768] [2024-06-20 17:15:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:59,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:59,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975209768] [2024-06-20 17:15:59,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975209768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:59,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50544155] [2024-06-20 17:15:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:59,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:59,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:59,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:59,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1532 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) [2024-06-20 17:15:59,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:59,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:59,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:00,914 INFO L124 PetriNetUnfolderBase]: 1434/2381 cut-off events. [2024-06-20 17:16:00,915 INFO L125 PetriNetUnfolderBase]: For 55335/55335 co-relation queries the response was YES. [2024-06-20 17:16:00,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13173 conditions, 2381 events. 1434/2381 cut-off events. For 55335/55335 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13127 event pairs, 369 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 13107. Up to 2222 conditions per place. [2024-06-20 17:16:00,932 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 161 selfloop transitions, 18 changer transitions 0/184 dead transitions. [2024-06-20 17:16:00,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 184 transitions, 1972 flow [2024-06-20 17:16:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:16:00,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:16:00,934 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1532 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:16:00,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 184 transitions, 1972 flow [2024-06-20 17:16:00,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 184 transitions, 1906 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:00,984 INFO L231 Difference]: Finished difference. Result has 147 places, 167 transitions, 1547 flow [2024-06-20 17:16:00,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1547, PETRI_PLACES=147, PETRI_TRANSITIONS=167} [2024-06-20 17:16:00,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-20 17:16:00,985 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 167 transitions, 1547 flow [2024-06-20 17:16:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:00,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:00,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:00,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:16:00,986 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:00,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1688096060, now seen corresponding path program 3 times [2024-06-20 17:16:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592768703] [2024-06-20 17:16:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:00,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592768703] [2024-06-20 17:16:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592768703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:03,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:16:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821666291] [2024-06-20 17:16:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:03,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:16:03,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:16:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:16:03,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:03,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 167 transitions, 1547 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) [2024-06-20 17:16:03,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:03,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:03,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:04,071 INFO L124 PetriNetUnfolderBase]: 1429/2367 cut-off events. [2024-06-20 17:16:04,071 INFO L125 PetriNetUnfolderBase]: For 56956/56956 co-relation queries the response was YES. [2024-06-20 17:16:04,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 2367 events. 1429/2367 cut-off events. For 56956/56956 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12942 event pairs, 330 based on Foata normal form. 2/2367 useless extension candidates. Maximal degree in co-relation 13037. Up to 2196 conditions per place. [2024-06-20 17:16:04,086 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-20 17:16:04,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 187 transitions, 1967 flow [2024-06-20 17:16:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:16:04,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:16:04,088 INFO L175 Difference]: Start difference. First operand has 147 places, 167 transitions, 1547 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:16:04,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 187 transitions, 1967 flow [2024-06-20 17:16:04,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 187 transitions, 1900 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:04,149 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1522 flow [2024-06-20 17:16:04,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1522, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-20 17:16:04,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-20 17:16:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1522 flow [2024-06-20 17:16:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:04,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:16:04,150 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:04,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash -696054179, now seen corresponding path program 1 times [2024-06-20 17:16:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467824127] [2024-06-20 17:16:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:04,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467824127] [2024-06-20 17:16:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467824127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523269066] [2024-06-20 17:16:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:07,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:07,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1522 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:07,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:07,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:07,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:08,232 INFO L124 PetriNetUnfolderBase]: 1434/2382 cut-off events. [2024-06-20 17:16:08,232 INFO L125 PetriNetUnfolderBase]: For 58971/58971 co-relation queries the response was YES. [2024-06-20 17:16:08,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13217 conditions, 2382 events. 1434/2382 cut-off events. For 58971/58971 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13149 event pairs, 355 based on Foata normal form. 1/2382 useless extension candidates. Maximal degree in co-relation 13148. Up to 2156 conditions per place. [2024-06-20 17:16:08,247 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 36 changer transitions 0/203 dead transitions. [2024-06-20 17:16:08,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2060 flow [2024-06-20 17:16:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:16:08,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 17:16:08,249 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1522 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:16:08,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2060 flow [2024-06-20 17:16:08,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 203 transitions, 2019 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:08,306 INFO L231 Difference]: Finished difference. Result has 151 places, 170 transitions, 1611 flow [2024-06-20 17:16:08,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1611, PETRI_PLACES=151, PETRI_TRANSITIONS=170} [2024-06-20 17:16:08,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 17:16:08,306 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 170 transitions, 1611 flow [2024-06-20 17:16:08,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:08,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:08,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:08,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:16:08,307 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:08,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -580763009, now seen corresponding path program 2 times [2024-06-20 17:16:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:08,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530281889] [2024-06-20 17:16:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:11,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530281889] [2024-06-20 17:16:11,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530281889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:11,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200629093] [2024-06-20 17:16:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:11,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:11,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 170 transitions, 1611 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:11,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:11,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:11,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:12,649 INFO L124 PetriNetUnfolderBase]: 1447/2398 cut-off events. [2024-06-20 17:16:12,649 INFO L125 PetriNetUnfolderBase]: For 64203/64203 co-relation queries the response was YES. [2024-06-20 17:16:12,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13817 conditions, 2398 events. 1447/2398 cut-off events. For 64203/64203 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13225 event pairs, 362 based on Foata normal form. 1/2397 useless extension candidates. Maximal degree in co-relation 13747. Up to 2037 conditions per place. [2024-06-20 17:16:12,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 75 changer transitions 0/211 dead transitions. [2024-06-20 17:16:12,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2415 flow [2024-06-20 17:16:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:16:12,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:16:12,668 INFO L175 Difference]: Start difference. First operand has 151 places, 170 transitions, 1611 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:16:12,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2415 flow [2024-06-20 17:16:12,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2307 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:12,743 INFO L231 Difference]: Finished difference. Result has 153 places, 179 transitions, 1821 flow [2024-06-20 17:16:12,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1821, PETRI_PLACES=153, PETRI_TRANSITIONS=179} [2024-06-20 17:16:12,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-20 17:16:12,744 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 179 transitions, 1821 flow [2024-06-20 17:16:12,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:12,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:12,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:12,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:16:12,744 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)] === [2024-06-20 17:16:12,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:12,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1977325231, now seen corresponding path program 3 times [2024-06-20 17:16:12,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:12,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139839545] [2024-06-20 17:16:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:12,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:15,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:15,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139839545] [2024-06-20 17:16:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139839545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:15,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:15,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067559707] [2024-06-20 17:16:15,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:15,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:15,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:15,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 179 transitions, 1821 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:15,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:15,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:15,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:17,186 INFO L124 PetriNetUnfolderBase]: 1452/2407 cut-off events. [2024-06-20 17:16:17,186 INFO L125 PetriNetUnfolderBase]: For 69407/69407 co-relation queries the response was YES. [2024-06-20 17:16:17,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14320 conditions, 2407 events. 1452/2407 cut-off events. For 69407/69407 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13237 event pairs, 362 based on Foata normal form. 1/2406 useless extension candidates. Maximal degree in co-relation 14249. Up to 2043 conditions per place. [2024-06-20 17:16:17,204 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 77 changer transitions 0/210 dead transitions. [2024-06-20 17:16:17,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 2517 flow [2024-06-20 17:16:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:16:17,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:16:17,206 INFO L175 Difference]: Start difference. First operand has 153 places, 179 transitions, 1821 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:16:17,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 2517 flow [2024-06-20 17:16:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2380 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:17,287 INFO L231 Difference]: Finished difference. Result has 158 places, 182 transitions, 1902 flow [2024-06-20 17:16:17,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1902, PETRI_PLACES=158, PETRI_TRANSITIONS=182} [2024-06-20 17:16:17,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 17:16:17,287 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 182 transitions, 1902 flow [2024-06-20 17:16:17,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:17,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:17,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:17,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:16:17,288 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:17,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash -580493898, now seen corresponding path program 1 times [2024-06-20 17:16:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839777790] [2024-06-20 17:16:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:20,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:20,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839777790] [2024-06-20 17:16:20,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839777790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:20,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:20,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398961290] [2024-06-20 17:16:20,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:20,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:20,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:20,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:20,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 182 transitions, 1902 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:20,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:20,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:20,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:21,443 INFO L124 PetriNetUnfolderBase]: 1494/2465 cut-off events. [2024-06-20 17:16:21,443 INFO L125 PetriNetUnfolderBase]: For 76730/76730 co-relation queries the response was YES. [2024-06-20 17:16:21,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 2465 events. 1494/2465 cut-off events. For 76730/76730 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13596 event pairs, 365 based on Foata normal form. 2/2465 useless extension candidates. Maximal degree in co-relation 14964. Up to 2164 conditions per place. [2024-06-20 17:16:21,461 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-20 17:16:21,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 227 transitions, 2730 flow [2024-06-20 17:16:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:16:21,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:16:21,463 INFO L175 Difference]: Start difference. First operand has 158 places, 182 transitions, 1902 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:16:21,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 227 transitions, 2730 flow [2024-06-20 17:16:21,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 227 transitions, 2584 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:21,548 INFO L231 Difference]: Finished difference. Result has 164 places, 195 transitions, 2066 flow [2024-06-20 17:16:21,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2066, PETRI_PLACES=164, PETRI_TRANSITIONS=195} [2024-06-20 17:16:21,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 17:16:21,549 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 195 transitions, 2066 flow [2024-06-20 17:16:21,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:21,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:21,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:21,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:16:21,550 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:21,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:21,550 INFO L85 PathProgramCache]: Analyzing trace with hash -432884298, now seen corresponding path program 2 times [2024-06-20 17:16:21,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:21,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927078988] [2024-06-20 17:16:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:21,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927078988] [2024-06-20 17:16:24,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927078988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:24,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:24,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369588356] [2024-06-20 17:16:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:24,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:24,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 195 transitions, 2066 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:24,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:24,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:24,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:25,918 INFO L124 PetriNetUnfolderBase]: 1546/2555 cut-off events. [2024-06-20 17:16:25,918 INFO L125 PetriNetUnfolderBase]: For 87117/87117 co-relation queries the response was YES. [2024-06-20 17:16:25,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16098 conditions, 2555 events. 1546/2555 cut-off events. For 87117/87117 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14179 event pairs, 360 based on Foata normal form. 4/2558 useless extension candidates. Maximal degree in co-relation 16023. Up to 2259 conditions per place. [2024-06-20 17:16:25,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-20 17:16:25,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 2925 flow [2024-06-20 17:16:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 17:16:25,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:16:25,943 INFO L175 Difference]: Start difference. First operand has 164 places, 195 transitions, 2066 flow. Second operand 10 states and 164 transitions. [2024-06-20 17:16:25,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 2925 flow [2024-06-20 17:16:26,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 2736 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:26,085 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 2208 flow [2024-06-20 17:16:26,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2208, PETRI_PLACES=169, PETRI_TRANSITIONS=207} [2024-06-20 17:16:26,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 17:16:26,085 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 2208 flow [2024-06-20 17:16:26,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:26,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:26,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:26,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:16:26,086 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:26,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1981044301, now seen corresponding path program 4 times [2024-06-20 17:16:26,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:26,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878057726] [2024-06-20 17:16:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:26,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:29,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878057726] [2024-06-20 17:16:29,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878057726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:29,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:29,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125958979] [2024-06-20 17:16:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:29,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:29,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:29,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:29,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:29,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:29,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 207 transitions, 2208 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:29,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:29,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:29,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:30,296 INFO L124 PetriNetUnfolderBase]: 1551/2558 cut-off events. [2024-06-20 17:16:30,296 INFO L125 PetriNetUnfolderBase]: For 89448/89448 co-relation queries the response was YES. [2024-06-20 17:16:30,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16408 conditions, 2558 events. 1551/2558 cut-off events. For 89448/89448 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14166 event pairs, 364 based on Foata normal form. 1/2558 useless extension candidates. Maximal degree in co-relation 16331. Up to 2329 conditions per place. [2024-06-20 17:16:30,315 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 33 changer transitions 0/233 dead transitions. [2024-06-20 17:16:30,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 233 transitions, 2779 flow [2024-06-20 17:16:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:16:30,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:16:30,316 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 2208 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:16:30,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 233 transitions, 2779 flow [2024-06-20 17:16:30,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 233 transitions, 2663 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:30,412 INFO L231 Difference]: Finished difference. Result has 171 places, 210 transitions, 2213 flow [2024-06-20 17:16:30,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2213, PETRI_PLACES=171, PETRI_TRANSITIONS=210} [2024-06-20 17:16:30,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-20 17:16:30,413 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 210 transitions, 2213 flow [2024-06-20 17:16:30,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:30,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:30,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:30,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:16:30,413 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:30,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:30,414 INFO L85 PathProgramCache]: Analyzing trace with hash -432676908, now seen corresponding path program 3 times [2024-06-20 17:16:30,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:30,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092104445] [2024-06-20 17:16:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:30,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:33,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092104445] [2024-06-20 17:16:33,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092104445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:33,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738879268] [2024-06-20 17:16:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:33,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:33,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 210 transitions, 2213 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:33,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:33,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:33,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:34,884 INFO L124 PetriNetUnfolderBase]: 1539/2544 cut-off events. [2024-06-20 17:16:34,884 INFO L125 PetriNetUnfolderBase]: For 91572/91572 co-relation queries the response was YES. [2024-06-20 17:16:34,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16193 conditions, 2544 events. 1539/2544 cut-off events. For 91572/91572 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14080 event pairs, 358 based on Foata normal form. 4/2547 useless extension candidates. Maximal degree in co-relation 16114. Up to 2256 conditions per place. [2024-06-20 17:16:34,905 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 52 changer transitions 0/242 dead transitions. [2024-06-20 17:16:34,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 242 transitions, 2795 flow [2024-06-20 17:16:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:16:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:16:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-20 17:16:34,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-20 17:16:34,906 INFO L175 Difference]: Start difference. First operand has 171 places, 210 transitions, 2213 flow. Second operand 11 states and 175 transitions. [2024-06-20 17:16:34,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 242 transitions, 2795 flow [2024-06-20 17:16:35,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2677 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:35,013 INFO L231 Difference]: Finished difference. Result has 176 places, 210 transitions, 2209 flow [2024-06-20 17:16:35,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2209, PETRI_PLACES=176, PETRI_TRANSITIONS=210} [2024-06-20 17:16:35,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-20 17:16:35,014 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 210 transitions, 2209 flow [2024-06-20 17:16:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:35,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:35,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:35,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:16:35,015 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:35,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2088803694, now seen corresponding path program 1 times [2024-06-20 17:16:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773768023] [2024-06-20 17:16:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773768023] [2024-06-20 17:16:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773768023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:38,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:38,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108088371] [2024-06-20 17:16:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:38,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:16:38,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 210 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:38,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:38,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:16:38,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:39,604 INFO L124 PetriNetUnfolderBase]: 1458/2441 cut-off events. [2024-06-20 17:16:39,604 INFO L125 PetriNetUnfolderBase]: For 102437/102437 co-relation queries the response was YES. [2024-06-20 17:16:39,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15891 conditions, 2441 events. 1458/2441 cut-off events. For 102437/102437 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13758 event pairs, 342 based on Foata normal form. 12/2426 useless extension candidates. Maximal degree in co-relation 15811. Up to 2075 conditions per place. [2024-06-20 17:16:39,621 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2024-06-20 17:16:39,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 241 transitions, 2757 flow [2024-06-20 17:16:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:16:39,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:16:39,622 INFO L175 Difference]: Start difference. First operand has 176 places, 210 transitions, 2209 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:16:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 241 transitions, 2757 flow [2024-06-20 17:16:39,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 241 transitions, 2633 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 17:16:39,734 INFO L231 Difference]: Finished difference. Result has 175 places, 211 transitions, 2179 flow [2024-06-20 17:16:39,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2179, PETRI_PLACES=175, PETRI_TRANSITIONS=211} [2024-06-20 17:16:39,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-20 17:16:39,735 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 211 transitions, 2179 flow [2024-06-20 17:16:39,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:39,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:39,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:39,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:16:39,735 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:39,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2138903167, now seen corresponding path program 5 times [2024-06-20 17:16:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:39,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262524838] [2024-06-20 17:16:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:42,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:42,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262524838] [2024-06-20 17:16:42,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262524838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:42,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:42,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:42,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799947260] [2024-06-20 17:16:42,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:42,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:42,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:42,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:42,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 211 transitions, 2179 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:44,202 INFO L124 PetriNetUnfolderBase]: 1588/2619 cut-off events. [2024-06-20 17:16:44,202 INFO L125 PetriNetUnfolderBase]: For 97720/97720 co-relation queries the response was YES. [2024-06-20 17:16:44,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16825 conditions, 2619 events. 1588/2619 cut-off events. For 97720/97720 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14591 event pairs, 398 based on Foata normal form. 1/2618 useless extension candidates. Maximal degree in co-relation 16744. Up to 2237 conditions per place. [2024-06-20 17:16:44,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 83 changer transitions 0/242 dead transitions. [2024-06-20 17:16:44,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 242 transitions, 2957 flow [2024-06-20 17:16:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:16:44,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:16:44,223 INFO L175 Difference]: Start difference. First operand has 175 places, 211 transitions, 2179 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:16:44,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 242 transitions, 2957 flow [2024-06-20 17:16:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2885 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:44,344 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2329 flow [2024-06-20 17:16:44,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2329, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2024-06-20 17:16:44,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-20 17:16:44,344 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2329 flow [2024-06-20 17:16:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:44,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:44,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:44,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:16:44,345 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:44,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -434253871, now seen corresponding path program 6 times [2024-06-20 17:16:44,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:44,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824854879] [2024-06-20 17:16:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:44,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824854879] [2024-06-20 17:16:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824854879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:47,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237836871] [2024-06-20 17:16:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:47,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:47,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2329 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:47,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:47,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:47,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:48,645 INFO L124 PetriNetUnfolderBase]: 1593/2624 cut-off events. [2024-06-20 17:16:48,645 INFO L125 PetriNetUnfolderBase]: For 101624/101624 co-relation queries the response was YES. [2024-06-20 17:16:48,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17030 conditions, 2624 events. 1593/2624 cut-off events. For 101624/101624 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14626 event pairs, 396 based on Foata normal form. 1/2623 useless extension candidates. Maximal degree in co-relation 16948. Up to 2243 conditions per place. [2024-06-20 17:16:48,667 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 84 changer transitions 0/242 dead transitions. [2024-06-20 17:16:48,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 242 transitions, 3109 flow [2024-06-20 17:16:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:16:48,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:16:48,669 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2329 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:16:48,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 242 transitions, 3109 flow [2024-06-20 17:16:48,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 242 transitions, 2859 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:48,798 INFO L231 Difference]: Finished difference. Result has 178 places, 217 transitions, 2309 flow [2024-06-20 17:16:48,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2309, PETRI_PLACES=178, PETRI_TRANSITIONS=217} [2024-06-20 17:16:48,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 17:16:48,798 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 217 transitions, 2309 flow [2024-06-20 17:16:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:48,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:48,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:16:48,799 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:48,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash 994735326, now seen corresponding path program 4 times [2024-06-20 17:16:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187009213] [2024-06-20 17:16:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:51,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187009213] [2024-06-20 17:16:51,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187009213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:51,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:51,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:51,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767222492] [2024-06-20 17:16:51,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:51,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:51,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:51,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 217 transitions, 2309 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:51,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:51,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:52,947 INFO L124 PetriNetUnfolderBase]: 1603/2644 cut-off events. [2024-06-20 17:16:52,947 INFO L125 PetriNetUnfolderBase]: For 105836/105842 co-relation queries the response was YES. [2024-06-20 17:16:52,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17130 conditions, 2644 events. 1603/2644 cut-off events. For 105836/105842 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14738 event pairs, 385 based on Foata normal form. 8/2651 useless extension candidates. Maximal degree in co-relation 17047. Up to 2356 conditions per place. [2024-06-20 17:16:52,969 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 58 changer transitions 0/247 dead transitions. [2024-06-20 17:16:52,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 247 transitions, 3001 flow [2024-06-20 17:16:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:16:52,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 17:16:52,971 INFO L175 Difference]: Start difference. First operand has 178 places, 217 transitions, 2309 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:16:52,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 247 transitions, 3001 flow [2024-06-20 17:16:53,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 247 transitions, 2826 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:53,107 INFO L231 Difference]: Finished difference. Result has 182 places, 221 transitions, 2302 flow [2024-06-20 17:16:53,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2302, PETRI_PLACES=182, PETRI_TRANSITIONS=221} [2024-06-20 17:16:53,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 17:16:53,108 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 221 transitions, 2302 flow [2024-06-20 17:16:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:53,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:53,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:53,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:16:53,108 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:53,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1765231426, now seen corresponding path program 5 times [2024-06-20 17:16:53,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:53,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490492019] [2024-06-20 17:16:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:53,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:55,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:55,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490492019] [2024-06-20 17:16:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490492019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:55,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017764420] [2024-06-20 17:16:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:55,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:16:55,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 221 transitions, 2302 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:55,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:55,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:16:55,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:57,128 INFO L124 PetriNetUnfolderBase]: 1613/2658 cut-off events. [2024-06-20 17:16:57,128 INFO L125 PetriNetUnfolderBase]: For 109673/109679 co-relation queries the response was YES. [2024-06-20 17:16:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17258 conditions, 2658 events. 1613/2658 cut-off events. For 109673/109679 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14838 event pairs, 385 based on Foata normal form. 8/2665 useless extension candidates. Maximal degree in co-relation 17174. Up to 2381 conditions per place. [2024-06-20 17:16:57,151 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 57 changer transitions 0/243 dead transitions. [2024-06-20 17:16:57,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 243 transitions, 2871 flow [2024-06-20 17:16:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:16:57,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:16:57,152 INFO L175 Difference]: Start difference. First operand has 182 places, 221 transitions, 2302 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:16:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 243 transitions, 2871 flow [2024-06-20 17:16:57,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 243 transitions, 2785 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:57,312 INFO L231 Difference]: Finished difference. Result has 185 places, 224 transitions, 2381 flow [2024-06-20 17:16:57,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2381, PETRI_PLACES=185, PETRI_TRANSITIONS=224} [2024-06-20 17:16:57,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 17:16:57,313 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 224 transitions, 2381 flow [2024-06-20 17:16:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:57,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:57,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:57,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:16:57,313 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1755763591, now seen corresponding path program 7 times [2024-06-20 17:16:57,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:57,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507167249] [2024-06-20 17:16:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:57,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:00,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:00,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507167249] [2024-06-20 17:17:00,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507167249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:00,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:00,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:00,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288933546] [2024-06-20 17:17:00,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:00,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:00,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:00,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 224 transitions, 2381 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:00,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:00,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:00,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:01,477 INFO L124 PetriNetUnfolderBase]: 1618/2661 cut-off events. [2024-06-20 17:17:01,477 INFO L125 PetriNetUnfolderBase]: For 112715/112715 co-relation queries the response was YES. [2024-06-20 17:17:01,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17520 conditions, 2661 events. 1618/2661 cut-off events. For 112715/112715 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14846 event pairs, 390 based on Foata normal form. 1/2660 useless extension candidates. Maximal degree in co-relation 17434. Up to 2277 conditions per place. [2024-06-20 17:17:01,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 91 changer transitions 0/246 dead transitions. [2024-06-20 17:17:01,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 246 transitions, 3054 flow [2024-06-20 17:17:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:17:01,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:17:01,504 INFO L175 Difference]: Start difference. First operand has 185 places, 224 transitions, 2381 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:17:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 246 transitions, 3054 flow [2024-06-20 17:17:01,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 246 transitions, 2928 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:01,640 INFO L231 Difference]: Finished difference. Result has 187 places, 227 transitions, 2486 flow [2024-06-20 17:17:01,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2486, PETRI_PLACES=187, PETRI_TRANSITIONS=227} [2024-06-20 17:17:01,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-20 17:17:01,640 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 227 transitions, 2486 flow [2024-06-20 17:17:01,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:01,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:01,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:01,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:17:01,641 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:01,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash -109126460, now seen corresponding path program 6 times [2024-06-20 17:17:01,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:01,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103570399] [2024-06-20 17:17:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:01,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:04,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:04,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103570399] [2024-06-20 17:17:04,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103570399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:04,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:04,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:04,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875575394] [2024-06-20 17:17:04,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:04,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:04,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:04,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 227 transitions, 2486 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:04,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:04,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:04,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:05,677 INFO L124 PetriNetUnfolderBase]: 1628/2689 cut-off events. [2024-06-20 17:17:05,677 INFO L125 PetriNetUnfolderBase]: For 118408/118414 co-relation queries the response was YES. [2024-06-20 17:17:05,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17783 conditions, 2689 events. 1628/2689 cut-off events. For 118408/118414 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15098 event pairs, 380 based on Foata normal form. 8/2696 useless extension candidates. Maximal degree in co-relation 17696. Up to 2281 conditions per place. [2024-06-20 17:17:05,700 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 90 changer transitions 0/259 dead transitions. [2024-06-20 17:17:05,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 259 transitions, 3278 flow [2024-06-20 17:17:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:17:05,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 17:17:05,702 INFO L175 Difference]: Start difference. First operand has 187 places, 227 transitions, 2486 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:17:05,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 259 transitions, 3278 flow [2024-06-20 17:17:05,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 259 transitions, 3125 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:05,868 INFO L231 Difference]: Finished difference. Result has 191 places, 236 transitions, 2675 flow [2024-06-20 17:17:05,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2675, PETRI_PLACES=191, PETRI_TRANSITIONS=236} [2024-06-20 17:17:05,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-20 17:17:05,869 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 236 transitions, 2675 flow [2024-06-20 17:17:05,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:05,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:05,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:17:05,870 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:05,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1742460156, now seen corresponding path program 7 times [2024-06-20 17:17:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:05,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121879492] [2024-06-20 17:17:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:08,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:08,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121879492] [2024-06-20 17:17:08,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121879492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:08,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:08,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073657211] [2024-06-20 17:17:08,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:08,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:08,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:08,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 236 transitions, 2675 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:08,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:08,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:09,676 INFO L124 PetriNetUnfolderBase]: 1686/2765 cut-off events. [2024-06-20 17:17:09,676 INFO L125 PetriNetUnfolderBase]: For 133573/133573 co-relation queries the response was YES. [2024-06-20 17:17:09,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19154 conditions, 2765 events. 1686/2765 cut-off events. For 133573/133573 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15450 event pairs, 394 based on Foata normal form. 2/2765 useless extension candidates. Maximal degree in co-relation 19065. Up to 2282 conditions per place. [2024-06-20 17:17:09,700 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 106 changer transitions 0/271 dead transitions. [2024-06-20 17:17:09,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 271 transitions, 3683 flow [2024-06-20 17:17:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:17:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:17:09,702 INFO L175 Difference]: Start difference. First operand has 191 places, 236 transitions, 2675 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:17:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 271 transitions, 3683 flow [2024-06-20 17:17:09,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 271 transitions, 3586 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:09,855 INFO L231 Difference]: Finished difference. Result has 195 places, 248 transitions, 3020 flow [2024-06-20 17:17:09,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3020, PETRI_PLACES=195, PETRI_TRANSITIONS=248} [2024-06-20 17:17:09,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-20 17:17:09,855 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 248 transitions, 3020 flow [2024-06-20 17:17:09,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:09,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:09,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:09,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:17:09,856 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:09,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:09,857 INFO L85 PathProgramCache]: Analyzing trace with hash 268136976, now seen corresponding path program 8 times [2024-06-20 17:17:09,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:09,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080904328] [2024-06-20 17:17:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:09,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:12,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080904328] [2024-06-20 17:17:12,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080904328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:12,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:12,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548160683] [2024-06-20 17:17:12,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:12,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:12,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:12,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:12,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:12,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 248 transitions, 3020 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:12,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:12,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:12,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:13,833 INFO L124 PetriNetUnfolderBase]: 1696/2783 cut-off events. [2024-06-20 17:17:13,833 INFO L125 PetriNetUnfolderBase]: For 141926/141926 co-relation queries the response was YES. [2024-06-20 17:17:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19911 conditions, 2783 events. 1696/2783 cut-off events. For 141926/141926 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15591 event pairs, 382 based on Foata normal form. 2/2783 useless extension candidates. Maximal degree in co-relation 19819. Up to 2292 conditions per place. [2024-06-20 17:17:13,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 114 changer transitions 0/276 dead transitions. [2024-06-20 17:17:13,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 276 transitions, 3890 flow [2024-06-20 17:17:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:17:13,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 17:17:13,856 INFO L175 Difference]: Start difference. First operand has 195 places, 248 transitions, 3020 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:17:13,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 276 transitions, 3890 flow [2024-06-20 17:17:14,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 276 transitions, 3786 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 17:17:14,045 INFO L231 Difference]: Finished difference. Result has 202 places, 251 transitions, 3212 flow [2024-06-20 17:17:14,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3212, PETRI_PLACES=202, PETRI_TRANSITIONS=251} [2024-06-20 17:17:14,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-20 17:17:14,046 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 251 transitions, 3212 flow [2024-06-20 17:17:14,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:14,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:14,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:14,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:17:14,047 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:14,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash 267929586, now seen corresponding path program 9 times [2024-06-20 17:17:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:14,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085850051] [2024-06-20 17:17:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:14,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:16,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:16,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085850051] [2024-06-20 17:17:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085850051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:16,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:16,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261213323] [2024-06-20 17:17:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:16,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:16,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:16,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 251 transitions, 3212 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:16,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:16,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:16,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:18,503 INFO L124 PetriNetUnfolderBase]: 1700/2793 cut-off events. [2024-06-20 17:17:18,503 INFO L125 PetriNetUnfolderBase]: For 144904/144904 co-relation queries the response was YES. [2024-06-20 17:17:18,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19954 conditions, 2793 events. 1700/2793 cut-off events. For 144904/144904 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15657 event pairs, 376 based on Foata normal form. 4/2795 useless extension candidates. Maximal degree in co-relation 19860. Up to 2297 conditions per place. [2024-06-20 17:17:18,528 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 119 changer transitions 0/280 dead transitions. [2024-06-20 17:17:18,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 280 transitions, 4000 flow [2024-06-20 17:17:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:17:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:17:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 17:17:18,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:17:18,530 INFO L175 Difference]: Start difference. First operand has 202 places, 251 transitions, 3212 flow. Second operand 10 states and 164 transitions. [2024-06-20 17:17:18,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 280 transitions, 4000 flow [2024-06-20 17:17:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 280 transitions, 3636 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 17:17:18,723 INFO L231 Difference]: Finished difference. Result has 205 places, 254 transitions, 3164 flow [2024-06-20 17:17:18,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3164, PETRI_PLACES=205, PETRI_TRANSITIONS=254} [2024-06-20 17:17:18,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-20 17:17:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 254 transitions, 3164 flow [2024-06-20 17:17:18,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:18,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:18,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:18,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:17:18,724 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:18,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1425980743, now seen corresponding path program 8 times [2024-06-20 17:17:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:18,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538046286] [2024-06-20 17:17:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538046286] [2024-06-20 17:17:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538046286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:21,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:21,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191574881] [2024-06-20 17:17:21,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:21,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:21,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:21,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:21,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 254 transitions, 3164 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:21,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:21,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:21,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:22,931 INFO L124 PetriNetUnfolderBase]: 1697/2789 cut-off events. [2024-06-20 17:17:22,931 INFO L125 PetriNetUnfolderBase]: For 142351/142351 co-relation queries the response was YES. [2024-06-20 17:17:22,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19790 conditions, 2789 events. 1697/2789 cut-off events. For 142351/142351 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15690 event pairs, 404 based on Foata normal form. 1/2788 useless extension candidates. Maximal degree in co-relation 19695. Up to 2424 conditions per place. [2024-06-20 17:17:22,959 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 68 changer transitions 0/280 dead transitions. [2024-06-20 17:17:22,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 280 transitions, 3896 flow [2024-06-20 17:17:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 17:17:22,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 17:17:22,961 INFO L175 Difference]: Start difference. First operand has 205 places, 254 transitions, 3164 flow. Second operand 7 states and 127 transitions. [2024-06-20 17:17:22,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 280 transitions, 3896 flow [2024-06-20 17:17:23,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 280 transitions, 3624 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 17:17:23,186 INFO L231 Difference]: Finished difference. Result has 205 places, 254 transitions, 3039 flow [2024-06-20 17:17:23,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3039, PETRI_PLACES=205, PETRI_TRANSITIONS=254} [2024-06-20 17:17:23,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-20 17:17:23,186 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 254 transitions, 3039 flow [2024-06-20 17:17:23,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:23,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:23,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:23,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:17:23,187 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:23,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:23,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1425981084, now seen corresponding path program 10 times [2024-06-20 17:17:23,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:23,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459315058] [2024-06-20 17:17:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:23,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:25,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:25,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459315058] [2024-06-20 17:17:25,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459315058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:25,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:25,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161263250] [2024-06-20 17:17:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:25,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:25,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:25,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 254 transitions, 3039 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:25,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:25,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:25,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:27,142 INFO L124 PetriNetUnfolderBase]: 1691/2779 cut-off events. [2024-06-20 17:17:27,142 INFO L125 PetriNetUnfolderBase]: For 145079/145079 co-relation queries the response was YES. [2024-06-20 17:17:27,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19448 conditions, 2779 events. 1691/2779 cut-off events. For 145079/145079 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15620 event pairs, 403 based on Foata normal form. 2/2779 useless extension candidates. Maximal degree in co-relation 19352. Up to 2456 conditions per place. [2024-06-20 17:17:27,167 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 210 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-20 17:17:27,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 276 transitions, 3647 flow [2024-06-20 17:17:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:17:27,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 17:17:27,169 INFO L175 Difference]: Start difference. First operand has 205 places, 254 transitions, 3039 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:17:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 276 transitions, 3647 flow [2024-06-20 17:17:27,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 276 transitions, 3407 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:17:27,379 INFO L231 Difference]: Finished difference. Result has 203 places, 254 transitions, 2927 flow [2024-06-20 17:17:27,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2927, PETRI_PLACES=203, PETRI_TRANSITIONS=254} [2024-06-20 17:17:27,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-20 17:17:27,380 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 254 transitions, 2927 flow [2024-06-20 17:17:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:27,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:27,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:17:27,381 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:27,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1479975726, now seen corresponding path program 11 times [2024-06-20 17:17:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323284952] [2024-06-20 17:17:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323284952] [2024-06-20 17:17:30,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323284952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:30,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:30,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:30,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249018676] [2024-06-20 17:17:30,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:30,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:30,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:30,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:30,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:30,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 254 transitions, 2927 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:30,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:30,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:30,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:31,565 INFO L124 PetriNetUnfolderBase]: 1725/2843 cut-off events. [2024-06-20 17:17:31,566 INFO L125 PetriNetUnfolderBase]: For 143762/143762 co-relation queries the response was YES. [2024-06-20 17:17:31,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19533 conditions, 2843 events. 1725/2843 cut-off events. For 143762/143762 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16115 event pairs, 376 based on Foata normal form. 4/2846 useless extension candidates. Maximal degree in co-relation 19437. Up to 2418 conditions per place. [2024-06-20 17:17:31,594 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-20 17:17:31,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 300 transitions, 3855 flow [2024-06-20 17:17:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:17:31,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 17:17:31,596 INFO L175 Difference]: Start difference. First operand has 203 places, 254 transitions, 2927 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:17:31,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 300 transitions, 3855 flow [2024-06-20 17:17:31,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 300 transitions, 3723 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:31,833 INFO L231 Difference]: Finished difference. Result has 207 places, 266 transitions, 3204 flow [2024-06-20 17:17:31,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3204, PETRI_PLACES=207, PETRI_TRANSITIONS=266} [2024-06-20 17:17:31,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 17:17:31,833 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 266 transitions, 3204 flow [2024-06-20 17:17:31,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:31,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:31,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:31,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:17:31,834 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:31,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1749275196, now seen corresponding path program 12 times [2024-06-20 17:17:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:31,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959079222] [2024-06-20 17:17:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:31,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:34,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:34,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959079222] [2024-06-20 17:17:34,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959079222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:34,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789451459] [2024-06-20 17:17:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:34,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:34,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 266 transitions, 3204 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:34,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:34,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:34,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:36,351 INFO L124 PetriNetUnfolderBase]: 1713/2827 cut-off events. [2024-06-20 17:17:36,352 INFO L125 PetriNetUnfolderBase]: For 143150/143150 co-relation queries the response was YES. [2024-06-20 17:17:36,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19598 conditions, 2827 events. 1713/2827 cut-off events. For 143150/143150 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16055 event pairs, 374 based on Foata normal form. 4/2830 useless extension candidates. Maximal degree in co-relation 19500. Up to 2408 conditions per place. [2024-06-20 17:17:36,376 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 98 changer transitions 0/306 dead transitions. [2024-06-20 17:17:36,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 306 transitions, 3920 flow [2024-06-20 17:17:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:17:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:17:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-20 17:17:36,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-20 17:17:36,377 INFO L175 Difference]: Start difference. First operand has 207 places, 266 transitions, 3204 flow. Second operand 11 states and 188 transitions. [2024-06-20 17:17:36,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 306 transitions, 3920 flow [2024-06-20 17:17:36,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 306 transitions, 3699 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:36,587 INFO L231 Difference]: Finished difference. Result has 212 places, 266 transitions, 3197 flow [2024-06-20 17:17:36,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3197, PETRI_PLACES=212, PETRI_TRANSITIONS=266} [2024-06-20 17:17:36,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-20 17:17:36,588 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 266 transitions, 3197 flow [2024-06-20 17:17:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:36,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:36,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:36,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:17:36,588 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:36,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:36,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1479767995, now seen corresponding path program 9 times [2024-06-20 17:17:36,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:36,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365222861] [2024-06-20 17:17:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:36,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365222861] [2024-06-20 17:17:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365222861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:39,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:39,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747300158] [2024-06-20 17:17:39,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:39,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:39,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:39,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:39,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 266 transitions, 3197 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:39,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:39,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:39,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:41,186 INFO L124 PetriNetUnfolderBase]: 1710/2827 cut-off events. [2024-06-20 17:17:41,186 INFO L125 PetriNetUnfolderBase]: For 141367/141367 co-relation queries the response was YES. [2024-06-20 17:17:41,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19543 conditions, 2827 events. 1710/2827 cut-off events. For 141367/141367 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16082 event pairs, 388 based on Foata normal form. 1/2827 useless extension candidates. Maximal degree in co-relation 19444. Up to 2445 conditions per place. [2024-06-20 17:17:41,212 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 72 changer transitions 0/306 dead transitions. [2024-06-20 17:17:41,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 306 transitions, 3919 flow [2024-06-20 17:17:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:17:41,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:17:41,214 INFO L175 Difference]: Start difference. First operand has 212 places, 266 transitions, 3197 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:17:41,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 306 transitions, 3919 flow [2024-06-20 17:17:41,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 306 transitions, 3665 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-20 17:17:41,440 INFO L231 Difference]: Finished difference. Result has 210 places, 266 transitions, 3103 flow [2024-06-20 17:17:41,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3103, PETRI_PLACES=210, PETRI_TRANSITIONS=266} [2024-06-20 17:17:41,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 17:17:41,441 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 266 transitions, 3103 flow [2024-06-20 17:17:41,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:41,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:41,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:41,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:17:41,441 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:41,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:41,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1479983662, now seen corresponding path program 2 times [2024-06-20 17:17:41,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:41,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728073459] [2024-06-20 17:17:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:41,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:44,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728073459] [2024-06-20 17:17:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728073459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:44,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:44,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051263517] [2024-06-20 17:17:44,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:44,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:44,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:44,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:17:44,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 266 transitions, 3103 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:44,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:44,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:17:44,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:45,586 INFO L124 PetriNetUnfolderBase]: 1620/2699 cut-off events. [2024-06-20 17:17:45,586 INFO L125 PetriNetUnfolderBase]: For 157876/157886 co-relation queries the response was YES. [2024-06-20 17:17:45,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18882 conditions, 2699 events. 1620/2699 cut-off events. For 157876/157886 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15519 event pairs, 352 based on Foata normal form. 20/2686 useless extension candidates. Maximal degree in co-relation 18783. Up to 2235 conditions per place. [2024-06-20 17:17:45,612 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 217 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-20 17:17:45,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 294 transitions, 3737 flow [2024-06-20 17:17:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:17:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:17:45,613 INFO L175 Difference]: Start difference. First operand has 210 places, 266 transitions, 3103 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:17:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 294 transitions, 3737 flow [2024-06-20 17:17:45,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 294 transitions, 3544 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 17:17:45,836 INFO L231 Difference]: Finished difference. Result has 207 places, 267 transitions, 3022 flow [2024-06-20 17:17:45,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3022, PETRI_PLACES=207, PETRI_TRANSITIONS=267} [2024-06-20 17:17:45,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 17:17:45,837 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 267 transitions, 3022 flow [2024-06-20 17:17:45,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:45,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:45,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:45,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:17:45,837 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:45,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash 262430992, now seen corresponding path program 3 times [2024-06-20 17:17:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449204373] [2024-06-20 17:17:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:49,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:49,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449204373] [2024-06-20 17:17:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449204373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:49,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:49,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501369288] [2024-06-20 17:17:49,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:49,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:17:49,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 267 transitions, 3022 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:49,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:49,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:17:49,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:50,588 INFO L124 PetriNetUnfolderBase]: 1659/2780 cut-off events. [2024-06-20 17:17:50,588 INFO L125 PetriNetUnfolderBase]: For 153734/153739 co-relation queries the response was YES. [2024-06-20 17:17:50,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19164 conditions, 2780 events. 1659/2780 cut-off events. For 153734/153739 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 16204 event pairs, 361 based on Foata normal form. 12/2758 useless extension candidates. Maximal degree in co-relation 19065. Up to 2337 conditions per place. [2024-06-20 17:17:50,616 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 44 changer transitions 0/288 dead transitions. [2024-06-20 17:17:50,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 288 transitions, 3624 flow [2024-06-20 17:17:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:17:50,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 17:17:50,618 INFO L175 Difference]: Start difference. First operand has 207 places, 267 transitions, 3022 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:17:50,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 288 transitions, 3624 flow [2024-06-20 17:17:50,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 288 transitions, 3546 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:50,857 INFO L231 Difference]: Finished difference. Result has 209 places, 268 transitions, 3060 flow [2024-06-20 17:17:50,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3060, PETRI_PLACES=209, PETRI_TRANSITIONS=268} [2024-06-20 17:17:50,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-20 17:17:50,858 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 268 transitions, 3060 flow [2024-06-20 17:17:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:50,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:50,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:50,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:17:50,858 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:50,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 275763472, now seen corresponding path program 4 times [2024-06-20 17:17:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:50,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297034060] [2024-06-20 17:17:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297034060] [2024-06-20 17:17:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297034060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:53,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:53,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570406895] [2024-06-20 17:17:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:53,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:53,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:54,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:17:54,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 268 transitions, 3060 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:54,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:54,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:17:54,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:55,085 INFO L124 PetriNetUnfolderBase]: 1661/2782 cut-off events. [2024-06-20 17:17:55,085 INFO L125 PetriNetUnfolderBase]: For 141480/141487 co-relation queries the response was YES. [2024-06-20 17:17:55,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18901 conditions, 2782 events. 1661/2782 cut-off events. For 141480/141487 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 16183 event pairs, 357 based on Foata normal form. 8/2752 useless extension candidates. Maximal degree in co-relation 18801. Up to 2207 conditions per place. [2024-06-20 17:17:55,111 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 205 selfloop transitions, 48 changer transitions 0/291 dead transitions. [2024-06-20 17:17:55,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 291 transitions, 3688 flow [2024-06-20 17:17:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:17:55,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 17:17:55,113 INFO L175 Difference]: Start difference. First operand has 209 places, 268 transitions, 3060 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:17:55,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 291 transitions, 3688 flow [2024-06-20 17:17:55,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 291 transitions, 3596 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:55,337 INFO L231 Difference]: Finished difference. Result has 211 places, 269 transitions, 3090 flow [2024-06-20 17:17:55,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=211, PETRI_TRANSITIONS=269} [2024-06-20 17:17:55,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 17:17:55,337 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 269 transitions, 3090 flow [2024-06-20 17:17:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:55,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:55,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:55,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:17:55,338 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:55,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash -112927804, now seen corresponding path program 1 times [2024-06-20 17:17:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:55,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025057197] [2024-06-20 17:17:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:55,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:57,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025057197] [2024-06-20 17:17:57,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025057197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:57,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129905582] [2024-06-20 17:17:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:57,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:17:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 269 transitions, 3090 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:57,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:17:57,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:58,930 INFO L124 PetriNetUnfolderBase]: 1861/3060 cut-off events. [2024-06-20 17:17:58,930 INFO L125 PetriNetUnfolderBase]: For 157552/157552 co-relation queries the response was YES. [2024-06-20 17:17:58,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20909 conditions, 3060 events. 1861/3060 cut-off events. For 157552/157552 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 17469 event pairs, 385 based on Foata normal form. 8/3066 useless extension candidates. Maximal degree in co-relation 20808. Up to 2673 conditions per place. [2024-06-20 17:17:58,961 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 32 changer transitions 0/305 dead transitions. [2024-06-20 17:17:58,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 305 transitions, 3972 flow [2024-06-20 17:17:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:17:58,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:17:58,963 INFO L175 Difference]: Start difference. First operand has 211 places, 269 transitions, 3090 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:17:58,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 305 transitions, 3972 flow [2024-06-20 17:17:59,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 305 transitions, 3866 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:59,258 INFO L231 Difference]: Finished difference. Result has 214 places, 271 transitions, 3090 flow [2024-06-20 17:17:59,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3090, PETRI_PLACES=214, PETRI_TRANSITIONS=271} [2024-06-20 17:17:59,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 17:17:59,259 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 271 transitions, 3090 flow [2024-06-20 17:17:59,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:59,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:59,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:17:59,259 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:59,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1830660012, now seen corresponding path program 2 times [2024-06-20 17:17:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595824584] [2024-06-20 17:17:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:01,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595824584] [2024-06-20 17:18:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595824584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:01,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143077315] [2024-06-20 17:18:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:01,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:01,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 271 transitions, 3090 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:01,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:01,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:01,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:03,167 INFO L124 PetriNetUnfolderBase]: 1897/3121 cut-off events. [2024-06-20 17:18:03,167 INFO L125 PetriNetUnfolderBase]: For 165712/165712 co-relation queries the response was YES. [2024-06-20 17:18:03,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21237 conditions, 3121 events. 1897/3121 cut-off events. For 165712/165712 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17959 event pairs, 429 based on Foata normal form. 10/3129 useless extension candidates. Maximal degree in co-relation 21135. Up to 2846 conditions per place. [2024-06-20 17:18:03,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 27 changer transitions 0/297 dead transitions. [2024-06-20 17:18:03,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 297 transitions, 3794 flow [2024-06-20 17:18:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:18:03,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:18:03,199 INFO L175 Difference]: Start difference. First operand has 214 places, 271 transitions, 3090 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:18:03,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 297 transitions, 3794 flow [2024-06-20 17:18:03,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 297 transitions, 3751 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:03,460 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 3128 flow [2024-06-20 17:18:03,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3128, PETRI_PLACES=218, PETRI_TRANSITIONS=272} [2024-06-20 17:18:03,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 17:18:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 3128 flow [2024-06-20 17:18:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:03,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:18:03,461 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:03,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -195958204, now seen corresponding path program 3 times [2024-06-20 17:18:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:03,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827161454] [2024-06-20 17:18:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827161454] [2024-06-20 17:18:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827161454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:05,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:05,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:05,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251686466] [2024-06-20 17:18:05,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:05,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:05,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 272 transitions, 3128 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:05,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:05,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:05,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:07,170 INFO L124 PetriNetUnfolderBase]: 1925/3165 cut-off events. [2024-06-20 17:18:07,170 INFO L125 PetriNetUnfolderBase]: For 168267/168267 co-relation queries the response was YES. [2024-06-20 17:18:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21639 conditions, 3165 events. 1925/3165 cut-off events. For 168267/168267 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18222 event pairs, 423 based on Foata normal form. 8/3171 useless extension candidates. Maximal degree in co-relation 21535. Up to 2852 conditions per place. [2024-06-20 17:18:07,199 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 29 changer transitions 0/302 dead transitions. [2024-06-20 17:18:07,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 302 transitions, 3866 flow [2024-06-20 17:18:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:18:07,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:18:07,200 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 3128 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:18:07,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 302 transitions, 3866 flow [2024-06-20 17:18:07,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 302 transitions, 3807 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:07,482 INFO L231 Difference]: Finished difference. Result has 220 places, 273 transitions, 3155 flow [2024-06-20 17:18:07,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3155, PETRI_PLACES=220, PETRI_TRANSITIONS=273} [2024-06-20 17:18:07,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-20 17:18:07,483 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 273 transitions, 3155 flow [2024-06-20 17:18:07,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:07,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:07,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:07,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:18:07,484 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:07,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash 268144912, now seen corresponding path program 4 times [2024-06-20 17:18:07,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:07,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121676126] [2024-06-20 17:18:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:09,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:09,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121676126] [2024-06-20 17:18:09,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121676126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:09,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:09,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:09,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909370630] [2024-06-20 17:18:09,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:09,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:09,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:09,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:09,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:09,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 273 transitions, 3155 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:09,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:09,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:09,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:11,394 INFO L124 PetriNetUnfolderBase]: 1961/3221 cut-off events. [2024-06-20 17:18:11,395 INFO L125 PetriNetUnfolderBase]: For 178153/178153 co-relation queries the response was YES. [2024-06-20 17:18:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22124 conditions, 3221 events. 1961/3221 cut-off events. For 178153/178153 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18561 event pairs, 443 based on Foata normal form. 10/3229 useless extension candidates. Maximal degree in co-relation 22019. Up to 2955 conditions per place. [2024-06-20 17:18:11,427 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 23 changer transitions 0/300 dead transitions. [2024-06-20 17:18:11,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 300 transitions, 3871 flow [2024-06-20 17:18:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:18:11,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-20 17:18:11,429 INFO L175 Difference]: Start difference. First operand has 220 places, 273 transitions, 3155 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:18:11,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 300 transitions, 3871 flow [2024-06-20 17:18:11,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 300 transitions, 3801 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:11,712 INFO L231 Difference]: Finished difference. Result has 223 places, 274 transitions, 3162 flow [2024-06-20 17:18:11,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3085, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3162, PETRI_PLACES=223, PETRI_TRANSITIONS=274} [2024-06-20 17:18:11,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-20 17:18:11,713 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 274 transitions, 3162 flow [2024-06-20 17:18:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:11,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:11,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:11,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:18:11,714 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:11,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1742452220, now seen corresponding path program 5 times [2024-06-20 17:18:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:11,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418262165] [2024-06-20 17:18:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:14,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418262165] [2024-06-20 17:18:14,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418262165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:14,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:14,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43340589] [2024-06-20 17:18:14,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:14,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:14,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 274 transitions, 3162 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:14,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:14,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:14,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:15,387 INFO L124 PetriNetUnfolderBase]: 1984/3258 cut-off events. [2024-06-20 17:18:15,387 INFO L125 PetriNetUnfolderBase]: For 180392/180392 co-relation queries the response was YES. [2024-06-20 17:18:15,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22243 conditions, 3258 events. 1984/3258 cut-off events. For 180392/180392 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18795 event pairs, 450 based on Foata normal form. 10/3266 useless extension candidates. Maximal degree in co-relation 22137. Up to 2992 conditions per place. [2024-06-20 17:18:15,417 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 22 changer transitions 0/299 dead transitions. [2024-06-20 17:18:15,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 299 transitions, 3874 flow [2024-06-20 17:18:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:18:15,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 17:18:15,418 INFO L175 Difference]: Start difference. First operand has 223 places, 274 transitions, 3162 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:18:15,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 299 transitions, 3874 flow [2024-06-20 17:18:15,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 299 transitions, 3819 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:15,690 INFO L231 Difference]: Finished difference. Result has 223 places, 275 transitions, 3184 flow [2024-06-20 17:18:15,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3184, PETRI_PLACES=223, PETRI_TRANSITIONS=275} [2024-06-20 17:18:15,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-20 17:18:15,691 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 275 transitions, 3184 flow [2024-06-20 17:18:15,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:15,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:15,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:15,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:18:15,691 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:15,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:15,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1742600090, now seen corresponding path program 6 times [2024-06-20 17:18:15,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:15,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151305900] [2024-06-20 17:18:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:15,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:18,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151305900] [2024-06-20 17:18:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151305900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:18,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136945184] [2024-06-20 17:18:18,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:18,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:18,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:18,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 275 transitions, 3184 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:18,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:18,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:18,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:19,402 INFO L124 PetriNetUnfolderBase]: 1966/3225 cut-off events. [2024-06-20 17:18:19,403 INFO L125 PetriNetUnfolderBase]: For 167066/167066 co-relation queries the response was YES. [2024-06-20 17:18:19,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21595 conditions, 3225 events. 1966/3225 cut-off events. For 167066/167066 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18503 event pairs, 398 based on Foata normal form. 8/3231 useless extension candidates. Maximal degree in co-relation 21488. Up to 2864 conditions per place. [2024-06-20 17:18:19,437 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 27 changer transitions 0/306 dead transitions. [2024-06-20 17:18:19,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 306 transitions, 3916 flow [2024-06-20 17:18:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 17:18:19,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 17:18:19,438 INFO L175 Difference]: Start difference. First operand has 223 places, 275 transitions, 3184 flow. Second operand 7 states and 127 transitions. [2024-06-20 17:18:19,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 306 transitions, 3916 flow [2024-06-20 17:18:19,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 306 transitions, 3857 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:19,733 INFO L231 Difference]: Finished difference. Result has 225 places, 275 transitions, 3183 flow [2024-06-20 17:18:19,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3183, PETRI_PLACES=225, PETRI_TRANSITIONS=275} [2024-06-20 17:18:19,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 17:18:19,733 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 275 transitions, 3183 flow [2024-06-20 17:18:19,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:19,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:19,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:19,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:18:19,734 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:19,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash 275769424, now seen corresponding path program 1 times [2024-06-20 17:18:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:19,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123011834] [2024-06-20 17:18:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:22,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:22,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123011834] [2024-06-20 17:18:22,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123011834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:22,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:22,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:22,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289139855] [2024-06-20 17:18:22,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:22,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:22,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:22,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:22,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 275 transitions, 3183 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:22,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:22,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:22,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:23,942 INFO L124 PetriNetUnfolderBase]: 1953/3215 cut-off events. [2024-06-20 17:18:23,943 INFO L125 PetriNetUnfolderBase]: For 155391/155391 co-relation queries the response was YES. [2024-06-20 17:18:23,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21103 conditions, 3215 events. 1953/3215 cut-off events. For 155391/155391 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18514 event pairs, 417 based on Foata normal form. 6/3219 useless extension candidates. Maximal degree in co-relation 20995. Up to 2875 conditions per place. [2024-06-20 17:18:23,968 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 27 changer transitions 0/303 dead transitions. [2024-06-20 17:18:23,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 303 transitions, 3909 flow [2024-06-20 17:18:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:18:23,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 17:18:23,970 INFO L175 Difference]: Start difference. First operand has 225 places, 275 transitions, 3183 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:18:23,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 303 transitions, 3909 flow [2024-06-20 17:18:24,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 303 transitions, 3823 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:24,266 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 3155 flow [2024-06-20 17:18:24,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3155, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-20 17:18:24,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 17:18:24,267 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 3155 flow [2024-06-20 17:18:24,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:24,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:24,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:24,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:18:24,267 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:24,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash -191499347, now seen corresponding path program 1 times [2024-06-20 17:18:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:24,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417556187] [2024-06-20 17:18:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:27,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:27,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417556187] [2024-06-20 17:18:27,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417556187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:27,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966152008] [2024-06-20 17:18:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:27,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:27,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 3155 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:27,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:27,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:27,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:29,069 INFO L124 PetriNetUnfolderBase]: 2021/3326 cut-off events. [2024-06-20 17:18:29,069 INFO L125 PetriNetUnfolderBase]: For 164182/164182 co-relation queries the response was YES. [2024-06-20 17:18:29,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21629 conditions, 3326 events. 2021/3326 cut-off events. For 164182/164182 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19172 event pairs, 362 based on Foata normal form. 8/3333 useless extension candidates. Maximal degree in co-relation 21520. Up to 2790 conditions per place. [2024-06-20 17:18:29,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 49 changer transitions 0/327 dead transitions. [2024-06-20 17:18:29,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 327 transitions, 4145 flow [2024-06-20 17:18:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:18:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:18:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-20 17:18:29,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:18:29,106 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 3155 flow. Second operand 11 states and 187 transitions. [2024-06-20 17:18:29,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 327 transitions, 4145 flow [2024-06-20 17:18:29,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4060 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:29,403 INFO L231 Difference]: Finished difference. Result has 232 places, 278 transitions, 3242 flow [2024-06-20 17:18:29,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3242, PETRI_PLACES=232, PETRI_TRANSITIONS=278} [2024-06-20 17:18:29,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-20 17:18:29,403 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 278 transitions, 3242 flow [2024-06-20 17:18:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:29,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:29,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:18:29,404 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:29,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash 44676013, now seen corresponding path program 2 times [2024-06-20 17:18:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:29,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458085582] [2024-06-20 17:18:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:32,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:32,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458085582] [2024-06-20 17:18:32,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458085582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:32,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:32,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537090109] [2024-06-20 17:18:32,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:32,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:32,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:32,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 278 transitions, 3242 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:32,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:32,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:32,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:34,380 INFO L124 PetriNetUnfolderBase]: 2108/3457 cut-off events. [2024-06-20 17:18:34,381 INFO L125 PetriNetUnfolderBase]: For 171222/171222 co-relation queries the response was YES. [2024-06-20 17:18:34,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22576 conditions, 3457 events. 2108/3457 cut-off events. For 171222/171222 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20163 event pairs, 447 based on Foata normal form. 8/3462 useless extension candidates. Maximal degree in co-relation 22466. Up to 3068 conditions per place. [2024-06-20 17:18:34,412 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 52 changer transitions 0/333 dead transitions. [2024-06-20 17:18:34,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 333 transitions, 4211 flow [2024-06-20 17:18:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:18:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:18:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-20 17:18:34,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-20 17:18:34,413 INFO L175 Difference]: Start difference. First operand has 232 places, 278 transitions, 3242 flow. Second operand 12 states and 194 transitions. [2024-06-20 17:18:34,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 333 transitions, 4211 flow [2024-06-20 17:18:34,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 333 transitions, 4003 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 17:18:34,735 INFO L231 Difference]: Finished difference. Result has 236 places, 288 transitions, 3309 flow [2024-06-20 17:18:34,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3309, PETRI_PLACES=236, PETRI_TRANSITIONS=288} [2024-06-20 17:18:34,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-20 17:18:34,735 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 288 transitions, 3309 flow [2024-06-20 17:18:34,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:34,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:34,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:34,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:18:34,736 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:34,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 35439235, now seen corresponding path program 1 times [2024-06-20 17:18:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638240571] [2024-06-20 17:18:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:38,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:38,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638240571] [2024-06-20 17:18:38,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638240571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:38,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:38,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452405579] [2024-06-20 17:18:38,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:38,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:38,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:38,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:38,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 288 transitions, 3309 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:38,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:38,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:38,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:39,604 INFO L124 PetriNetUnfolderBase]: 2118/3481 cut-off events. [2024-06-20 17:18:39,604 INFO L125 PetriNetUnfolderBase]: For 159436/159436 co-relation queries the response was YES. [2024-06-20 17:18:39,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22345 conditions, 3481 events. 2118/3481 cut-off events. For 159436/159436 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20396 event pairs, 457 based on Foata normal form. 2/3482 useless extension candidates. Maximal degree in co-relation 22236. Up to 3083 conditions per place. [2024-06-20 17:18:39,639 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 78 changer transitions 0/332 dead transitions. [2024-06-20 17:18:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 332 transitions, 4261 flow [2024-06-20 17:18:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:18:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:18:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-20 17:18:39,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-20 17:18:39,641 INFO L175 Difference]: Start difference. First operand has 236 places, 288 transitions, 3309 flow. Second operand 11 states and 184 transitions. [2024-06-20 17:18:39,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 332 transitions, 4261 flow [2024-06-20 17:18:39,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 332 transitions, 4151 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:39,955 INFO L231 Difference]: Finished difference. Result has 240 places, 291 transitions, 3427 flow [2024-06-20 17:18:39,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3427, PETRI_PLACES=240, PETRI_TRANSITIONS=291} [2024-06-20 17:18:39,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-20 17:18:39,956 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 291 transitions, 3427 flow [2024-06-20 17:18:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:39,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:39,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:39,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:18:39,957 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:39,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash -538331509, now seen corresponding path program 3 times [2024-06-20 17:18:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:39,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814033817] [2024-06-20 17:18:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:43,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:43,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814033817] [2024-06-20 17:18:43,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814033817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:43,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:43,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596674695] [2024-06-20 17:18:43,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:43,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:43,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 291 transitions, 3427 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:43,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:43,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:43,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:45,093 INFO L124 PetriNetUnfolderBase]: 2154/3527 cut-off events. [2024-06-20 17:18:45,094 INFO L125 PetriNetUnfolderBase]: For 178632/178632 co-relation queries the response was YES. [2024-06-20 17:18:45,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23086 conditions, 3527 events. 2154/3527 cut-off events. For 178632/178632 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 20582 event pairs, 458 based on Foata normal form. 8/3534 useless extension candidates. Maximal degree in co-relation 22976. Up to 3132 conditions per place. [2024-06-20 17:18:45,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 52 changer transitions 0/334 dead transitions. [2024-06-20 17:18:45,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 334 transitions, 4301 flow [2024-06-20 17:18:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:18:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:18:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-20 17:18:45,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 17:18:45,127 INFO L175 Difference]: Start difference. First operand has 240 places, 291 transitions, 3427 flow. Second operand 12 states and 189 transitions. [2024-06-20 17:18:45,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 334 transitions, 4301 flow [2024-06-20 17:18:45,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 334 transitions, 4085 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:45,462 INFO L231 Difference]: Finished difference. Result has 247 places, 296 transitions, 3424 flow [2024-06-20 17:18:45,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3424, PETRI_PLACES=247, PETRI_TRANSITIONS=296} [2024-06-20 17:18:45,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-20 17:18:45,463 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 296 transitions, 3424 flow [2024-06-20 17:18:45,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:45,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:45,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:18:45,463 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:45,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2122933117, now seen corresponding path program 1 times [2024-06-20 17:18:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:45,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541093518] [2024-06-20 17:18:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:48,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:48,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541093518] [2024-06-20 17:18:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541093518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:48,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:48,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985264797] [2024-06-20 17:18:48,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:48,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:48,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:48,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:48,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:48,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 296 transitions, 3424 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:48,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:48,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:48,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:49,783 INFO L124 PetriNetUnfolderBase]: 2175/3562 cut-off events. [2024-06-20 17:18:49,784 INFO L125 PetriNetUnfolderBase]: For 175583/175583 co-relation queries the response was YES. [2024-06-20 17:18:49,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23442 conditions, 3562 events. 2175/3562 cut-off events. For 175583/175583 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 20850 event pairs, 486 based on Foata normal form. 2/3562 useless extension candidates. Maximal degree in co-relation 23328. Up to 3178 conditions per place. [2024-06-20 17:18:49,818 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 59 changer transitions 0/332 dead transitions. [2024-06-20 17:18:49,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 332 transitions, 4374 flow [2024-06-20 17:18:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:18:49,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 17:18:49,820 INFO L175 Difference]: Start difference. First operand has 247 places, 296 transitions, 3424 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:18:49,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 332 transitions, 4374 flow [2024-06-20 17:18:50,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 332 transitions, 4248 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:50,177 INFO L231 Difference]: Finished difference. Result has 248 places, 300 transitions, 3502 flow [2024-06-20 17:18:50,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3502, PETRI_PLACES=248, PETRI_TRANSITIONS=300} [2024-06-20 17:18:50,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 17:18:50,178 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 300 transitions, 3502 flow [2024-06-20 17:18:50,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:50,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:50,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:50,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:18:50,178 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:50,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1377935119, now seen corresponding path program 2 times [2024-06-20 17:18:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:50,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246865563] [2024-06-20 17:18:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:53,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:53,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246865563] [2024-06-20 17:18:53,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246865563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:53,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:53,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:53,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001421435] [2024-06-20 17:18:53,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:53,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:53,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:53,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:53,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 300 transitions, 3502 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:53,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:53,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:53,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:55,186 INFO L124 PetriNetUnfolderBase]: 2183/3580 cut-off events. [2024-06-20 17:18:55,187 INFO L125 PetriNetUnfolderBase]: For 177125/177125 co-relation queries the response was YES. [2024-06-20 17:18:55,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 3580 events. 2183/3580 cut-off events. For 177125/177125 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21047 event pairs, 496 based on Foata normal form. 2/3580 useless extension candidates. Maximal degree in co-relation 23205. Up to 3257 conditions per place. [2024-06-20 17:18:55,220 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 56 changer transitions 0/328 dead transitions. [2024-06-20 17:18:55,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 328 transitions, 4262 flow [2024-06-20 17:18:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:18:55,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 17:18:55,222 INFO L175 Difference]: Start difference. First operand has 248 places, 300 transitions, 3502 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:18:55,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 328 transitions, 4262 flow [2024-06-20 17:18:55,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 328 transitions, 4137 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:55,599 INFO L231 Difference]: Finished difference. Result has 252 places, 302 transitions, 3538 flow [2024-06-20 17:18:55,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3538, PETRI_PLACES=252, PETRI_TRANSITIONS=302} [2024-06-20 17:18:55,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 17:18:55,600 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 302 transitions, 3538 flow [2024-06-20 17:18:55,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:55,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:55,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:55,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:18:55,601 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:55,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash -823782357, now seen corresponding path program 2 times [2024-06-20 17:18:55,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:55,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643502104] [2024-06-20 17:18:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:55,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:58,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:58,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643502104] [2024-06-20 17:18:58,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643502104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:58,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:58,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:58,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6034440] [2024-06-20 17:18:58,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:58,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:58,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:58,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:18:58,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 302 transitions, 3538 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:58,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:58,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:18:58,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:00,653 INFO L124 PetriNetUnfolderBase]: 2225/3646 cut-off events. [2024-06-20 17:19:00,653 INFO L125 PetriNetUnfolderBase]: For 192452/192452 co-relation queries the response was YES. [2024-06-20 17:19:00,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24194 conditions, 3646 events. 2225/3646 cut-off events. For 192452/192452 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21466 event pairs, 480 based on Foata normal form. 2/3646 useless extension candidates. Maximal degree in co-relation 24077. Up to 2982 conditions per place. [2024-06-20 17:19:00,693 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 163 changer transitions 0/352 dead transitions. [2024-06-20 17:19:00,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 352 transitions, 4930 flow [2024-06-20 17:19:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:19:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:19:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-20 17:19:00,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 17:19:00,694 INFO L175 Difference]: Start difference. First operand has 252 places, 302 transitions, 3538 flow. Second operand 12 states and 200 transitions. [2024-06-20 17:19:00,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 352 transitions, 4930 flow [2024-06-20 17:19:01,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 352 transitions, 4805 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:01,371 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 3937 flow [2024-06-20 17:19:01,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3937, PETRI_PLACES=258, PETRI_TRANSITIONS=311} [2024-06-20 17:19:01,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 17:19:01,371 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 3937 flow [2024-06-20 17:19:01,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:01,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:01,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:01,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:19:01,372 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:01,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash 40801061, now seen corresponding path program 3 times [2024-06-20 17:19:01,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:01,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576669596] [2024-06-20 17:19:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:01,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:04,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:04,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576669596] [2024-06-20 17:19:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576669596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:04,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:04,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:04,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725854103] [2024-06-20 17:19:04,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:04,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:04,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:04,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:04,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 311 transitions, 3937 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:04,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:04,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:04,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:06,214 INFO L124 PetriNetUnfolderBase]: 2251/3686 cut-off events. [2024-06-20 17:19:06,214 INFO L125 PetriNetUnfolderBase]: For 206695/206695 co-relation queries the response was YES. [2024-06-20 17:19:06,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25417 conditions, 3686 events. 2251/3686 cut-off events. For 206695/206695 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21689 event pairs, 481 based on Foata normal form. 2/3686 useless extension candidates. Maximal degree in co-relation 25299. Up to 3007 conditions per place. [2024-06-20 17:19:06,249 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 163 changer transitions 0/353 dead transitions. [2024-06-20 17:19:06,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 353 transitions, 5273 flow [2024-06-20 17:19:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:19:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:19:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-20 17:19:06,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-20 17:19:06,250 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 3937 flow. Second operand 11 states and 185 transitions. [2024-06-20 17:19:06,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 353 transitions, 5273 flow [2024-06-20 17:19:06,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 353 transitions, 4989 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:06,776 INFO L231 Difference]: Finished difference. Result has 263 places, 317 transitions, 4121 flow [2024-06-20 17:19:06,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4121, PETRI_PLACES=263, PETRI_TRANSITIONS=317} [2024-06-20 17:19:06,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-20 17:19:06,777 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 317 transitions, 4121 flow [2024-06-20 17:19:06,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:06,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:06,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:06,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:19:06,777 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:06,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash -815450487, now seen corresponding path program 4 times [2024-06-20 17:19:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:06,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439982419] [2024-06-20 17:19:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439982419] [2024-06-20 17:19:09,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439982419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:09,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:09,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411800488] [2024-06-20 17:19:09,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:09,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:09,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:09,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:09,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 317 transitions, 4121 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:09,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:09,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:09,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:11,726 INFO L124 PetriNetUnfolderBase]: 2245/3676 cut-off events. [2024-06-20 17:19:11,726 INFO L125 PetriNetUnfolderBase]: For 205945/205945 co-relation queries the response was YES. [2024-06-20 17:19:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25377 conditions, 3676 events. 2245/3676 cut-off events. For 205945/205945 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21630 event pairs, 483 based on Foata normal form. 2/3676 useless extension candidates. Maximal degree in co-relation 25257. Up to 3002 conditions per place. [2024-06-20 17:19:11,766 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 164 changer transitions 0/355 dead transitions. [2024-06-20 17:19:11,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 355 transitions, 5197 flow [2024-06-20 17:19:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:19:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:19:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 209 transitions. [2024-06-20 17:19:11,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921200750469043 [2024-06-20 17:19:11,768 INFO L175 Difference]: Start difference. First operand has 263 places, 317 transitions, 4121 flow. Second operand 13 states and 209 transitions. [2024-06-20 17:19:11,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 355 transitions, 5197 flow [2024-06-20 17:19:12,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 355 transitions, 4891 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:12,339 INFO L231 Difference]: Finished difference. Result has 269 places, 317 transitions, 4149 flow [2024-06-20 17:19:12,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4149, PETRI_PLACES=269, PETRI_TRANSITIONS=317} [2024-06-20 17:19:12,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 17:19:12,340 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 317 transitions, 4149 flow [2024-06-20 17:19:12,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:12,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:12,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:12,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:19:12,340 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:12,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash -700153675, now seen corresponding path program 3 times [2024-06-20 17:19:12,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:12,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236368063] [2024-06-20 17:19:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:12,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:15,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:15,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236368063] [2024-06-20 17:19:15,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236368063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:15,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:15,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116654353] [2024-06-20 17:19:15,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:15,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:15,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:15,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 317 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:15,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:15,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:15,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:16,931 INFO L124 PetriNetUnfolderBase]: 2281/3738 cut-off events. [2024-06-20 17:19:16,931 INFO L125 PetriNetUnfolderBase]: For 211489/211489 co-relation queries the response was YES. [2024-06-20 17:19:16,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25762 conditions, 3738 events. 2281/3738 cut-off events. For 211489/211489 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22057 event pairs, 501 based on Foata normal form. 2/3739 useless extension candidates. Maximal degree in co-relation 25641. Up to 3403 conditions per place. [2024-06-20 17:19:16,966 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 36 changer transitions 0/346 dead transitions. [2024-06-20 17:19:16,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 346 transitions, 4987 flow [2024-06-20 17:19:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:19:16,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 17:19:16,968 INFO L175 Difference]: Start difference. First operand has 269 places, 317 transitions, 4149 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:19:16,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 346 transitions, 4987 flow [2024-06-20 17:19:17,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 4641 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 17:19:17,616 INFO L231 Difference]: Finished difference. Result has 265 places, 320 transitions, 3927 flow [2024-06-20 17:19:17,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3927, PETRI_PLACES=265, PETRI_TRANSITIONS=320} [2024-06-20 17:19:17,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-20 17:19:17,616 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 320 transitions, 3927 flow [2024-06-20 17:19:17,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:17,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:17,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:17,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:19:17,617 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:17,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash -528080863, now seen corresponding path program 5 times [2024-06-20 17:19:17,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:17,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890790410] [2024-06-20 17:19:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:17,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890790410] [2024-06-20 17:19:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890790410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:20,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989486946] [2024-06-20 17:19:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:20,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:20,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:20,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 320 transitions, 3927 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:20,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:20,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:20,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:22,562 INFO L124 PetriNetUnfolderBase]: 2307/3772 cut-off events. [2024-06-20 17:19:22,562 INFO L125 PetriNetUnfolderBase]: For 221356/221356 co-relation queries the response was YES. [2024-06-20 17:19:22,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25826 conditions, 3772 events. 2307/3772 cut-off events. For 221356/221356 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22220 event pairs, 484 based on Foata normal form. 2/3773 useless extension candidates. Maximal degree in co-relation 25704. Up to 3367 conditions per place. [2024-06-20 17:19:22,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 74 changer transitions 0/358 dead transitions. [2024-06-20 17:19:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 358 transitions, 4937 flow [2024-06-20 17:19:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:19:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:19:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-20 17:19:22,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 17:19:22,608 INFO L175 Difference]: Start difference. First operand has 265 places, 320 transitions, 3927 flow. Second operand 12 states and 189 transitions. [2024-06-20 17:19:22,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 358 transitions, 4937 flow [2024-06-20 17:19:23,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 4857 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:23,198 INFO L231 Difference]: Finished difference. Result has 271 places, 326 transitions, 4085 flow [2024-06-20 17:19:23,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4085, PETRI_PLACES=271, PETRI_TRANSITIONS=326} [2024-06-20 17:19:23,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 17:19:23,199 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 326 transitions, 4085 flow [2024-06-20 17:19:23,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:23,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:23,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:19:23,199 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:23,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash -700159317, now seen corresponding path program 6 times [2024-06-20 17:19:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:23,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818979538] [2024-06-20 17:19:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:23,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818979538] [2024-06-20 17:19:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818979538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:26,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:26,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131527758] [2024-06-20 17:19:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:26,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:26,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:26,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 326 transitions, 4085 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:26,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:28,086 INFO L124 PetriNetUnfolderBase]: 2317/3790 cut-off events. [2024-06-20 17:19:28,086 INFO L125 PetriNetUnfolderBase]: For 227640/227640 co-relation queries the response was YES. [2024-06-20 17:19:28,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26111 conditions, 3790 events. 2317/3790 cut-off events. For 227640/227640 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22375 event pairs, 483 based on Foata normal form. 2/3791 useless extension candidates. Maximal degree in co-relation 25988. Up to 3377 conditions per place. [2024-06-20 17:19:28,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 77 changer transitions 0/360 dead transitions. [2024-06-20 17:19:28,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 360 transitions, 5066 flow [2024-06-20 17:19:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:19:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:19:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-20 17:19:28,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-20 17:19:28,124 INFO L175 Difference]: Start difference. First operand has 271 places, 326 transitions, 4085 flow. Second operand 11 states and 177 transitions. [2024-06-20 17:19:28,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 360 transitions, 5066 flow [2024-06-20 17:19:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 360 transitions, 4961 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:28,626 INFO L231 Difference]: Finished difference. Result has 274 places, 329 transitions, 4185 flow [2024-06-20 17:19:28,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4185, PETRI_PLACES=274, PETRI_TRANSITIONS=329} [2024-06-20 17:19:28,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-20 17:19:28,627 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 329 transitions, 4185 flow [2024-06-20 17:19:28,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:28,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:28,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:28,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:19:28,628 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:28,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash -534509953, now seen corresponding path program 7 times [2024-06-20 17:19:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:28,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256524413] [2024-06-20 17:19:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:28,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:31,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:31,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256524413] [2024-06-20 17:19:31,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256524413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:31,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989742655] [2024-06-20 17:19:31,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:31,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:31,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:31,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 329 transitions, 4185 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:31,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:31,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:31,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:33,543 INFO L124 PetriNetUnfolderBase]: 2311/3778 cut-off events. [2024-06-20 17:19:33,543 INFO L125 PetriNetUnfolderBase]: For 227776/227776 co-relation queries the response was YES. [2024-06-20 17:19:33,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26146 conditions, 3778 events. 2311/3778 cut-off events. For 227776/227776 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22288 event pairs, 481 based on Foata normal form. 2/3779 useless extension candidates. Maximal degree in co-relation 26021. Up to 3372 conditions per place. [2024-06-20 17:19:33,586 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 77 changer transitions 0/359 dead transitions. [2024-06-20 17:19:33,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 4973 flow [2024-06-20 17:19:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:19:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:19:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 17:19:33,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:19:33,587 INFO L175 Difference]: Start difference. First operand has 274 places, 329 transitions, 4185 flow. Second operand 11 states and 176 transitions. [2024-06-20 17:19:33,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 4973 flow [2024-06-20 17:19:34,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 359 transitions, 4787 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:34,199 INFO L231 Difference]: Finished difference. Result has 277 places, 329 transitions, 4159 flow [2024-06-20 17:19:34,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4159, PETRI_PLACES=277, PETRI_TRANSITIONS=329} [2024-06-20 17:19:34,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 17:19:34,200 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 329 transitions, 4159 flow [2024-06-20 17:19:34,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:34,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:34,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:19:34,200 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:34,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 921996333, now seen corresponding path program 4 times [2024-06-20 17:19:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:34,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127272146] [2024-06-20 17:19:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:37,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:37,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127272146] [2024-06-20 17:19:37,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127272146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:37,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:37,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:37,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833039074] [2024-06-20 17:19:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:37,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:37,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:37,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 329 transitions, 4159 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:37,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:37,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:37,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:38,802 INFO L124 PetriNetUnfolderBase]: 2293/3746 cut-off events. [2024-06-20 17:19:38,802 INFO L125 PetriNetUnfolderBase]: For 227436/227436 co-relation queries the response was YES. [2024-06-20 17:19:38,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25385 conditions, 3746 events. 2293/3746 cut-off events. For 227436/227436 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21922 event pairs, 364 based on Foata normal form. 8/3753 useless extension candidates. Maximal degree in co-relation 25259. Up to 3089 conditions per place. [2024-06-20 17:19:38,843 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 64 changer transitions 0/375 dead transitions. [2024-06-20 17:19:38,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 375 transitions, 5073 flow [2024-06-20 17:19:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:19:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:19:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-20 17:19:38,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-20 17:19:38,845 INFO L175 Difference]: Start difference. First operand has 277 places, 329 transitions, 4159 flow. Second operand 10 states and 174 transitions. [2024-06-20 17:19:38,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 375 transitions, 5073 flow [2024-06-20 17:19:39,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 375 transitions, 4887 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 17:19:39,545 INFO L231 Difference]: Finished difference. Result has 276 places, 329 transitions, 4111 flow [2024-06-20 17:19:39,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4111, PETRI_PLACES=276, PETRI_TRANSITIONS=329} [2024-06-20 17:19:39,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 17:19:39,546 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 329 transitions, 4111 flow [2024-06-20 17:19:39,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:39,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:39,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:39,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:19:39,546 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:39,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash 877785371, now seen corresponding path program 4 times [2024-06-20 17:19:39,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:39,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908804508] [2024-06-20 17:19:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:39,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:42,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908804508] [2024-06-20 17:19:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908804508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:42,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287913275] [2024-06-20 17:19:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:42,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:42,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:42,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 329 transitions, 4111 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:43,813 INFO L124 PetriNetUnfolderBase]: 2314/3789 cut-off events. [2024-06-20 17:19:43,813 INFO L125 PetriNetUnfolderBase]: For 221701/221707 co-relation queries the response was YES. [2024-06-20 17:19:43,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25938 conditions, 3789 events. 2314/3789 cut-off events. For 221701/221707 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22471 event pairs, 499 based on Foata normal form. 8/3796 useless extension candidates. Maximal degree in co-relation 25811. Up to 3405 conditions per place. [2024-06-20 17:19:43,856 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 300 selfloop transitions, 57 changer transitions 0/362 dead transitions. [2024-06-20 17:19:43,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 362 transitions, 5139 flow [2024-06-20 17:19:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:19:43,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:19:43,857 INFO L175 Difference]: Start difference. First operand has 276 places, 329 transitions, 4111 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:19:43,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 362 transitions, 5139 flow [2024-06-20 17:19:44,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 362 transitions, 5024 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:44,542 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 4205 flow [2024-06-20 17:19:44,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4205, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-20 17:19:44,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 17:19:44,543 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 4205 flow [2024-06-20 17:19:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:44,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:44,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:44,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:19:44,543 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:44,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1889827987, now seen corresponding path program 5 times [2024-06-20 17:19:44,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:44,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540233529] [2024-06-20 17:19:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540233529] [2024-06-20 17:19:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540233529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:47,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:47,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706353300] [2024-06-20 17:19:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:47,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:47,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 4205 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:47,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:47,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:47,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:49,041 INFO L124 PetriNetUnfolderBase]: 2322/3803 cut-off events. [2024-06-20 17:19:49,041 INFO L125 PetriNetUnfolderBase]: For 212411/212417 co-relation queries the response was YES. [2024-06-20 17:19:49,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25864 conditions, 3803 events. 2322/3803 cut-off events. For 212411/212417 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22586 event pairs, 505 based on Foata normal form. 8/3810 useless extension candidates. Maximal degree in co-relation 25737. Up to 3458 conditions per place. [2024-06-20 17:19:49,084 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 298 selfloop transitions, 55 changer transitions 0/358 dead transitions. [2024-06-20 17:19:49,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 358 transitions, 5023 flow [2024-06-20 17:19:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:19:49,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:19:49,086 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 4205 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:19:49,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 358 transitions, 5023 flow [2024-06-20 17:19:49,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 358 transitions, 4886 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:49,705 INFO L231 Difference]: Finished difference. Result has 280 places, 335 transitions, 4231 flow [2024-06-20 17:19:49,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4231, PETRI_PLACES=280, PETRI_TRANSITIONS=335} [2024-06-20 17:19:49,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 17:19:49,706 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 335 transitions, 4231 flow [2024-06-20 17:19:49,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:49,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:49,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:49,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:19:49,706 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:49,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1848316125, now seen corresponding path program 6 times [2024-06-20 17:19:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:49,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228597693] [2024-06-20 17:19:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:52,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228597693] [2024-06-20 17:19:52,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228597693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:52,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:52,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:52,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519147579] [2024-06-20 17:19:52,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:52,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:52,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 335 transitions, 4231 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:52,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:52,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:52,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:54,320 INFO L124 PetriNetUnfolderBase]: 2330/3815 cut-off events. [2024-06-20 17:19:54,320 INFO L125 PetriNetUnfolderBase]: For 216889/216895 co-relation queries the response was YES. [2024-06-20 17:19:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26026 conditions, 3815 events. 2330/3815 cut-off events. For 216889/216895 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22557 event pairs, 406 based on Foata normal form. 8/3822 useless extension candidates. Maximal degree in co-relation 25897. Up to 3247 conditions per place. [2024-06-20 17:19:54,359 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 287 selfloop transitions, 78 changer transitions 0/370 dead transitions. [2024-06-20 17:19:54,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 370 transitions, 5431 flow [2024-06-20 17:19:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:19:54,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:19:54,361 INFO L175 Difference]: Start difference. First operand has 280 places, 335 transitions, 4231 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:19:54,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 370 transitions, 5431 flow [2024-06-20 17:19:54,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 370 transitions, 5308 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:54,962 INFO L231 Difference]: Finished difference. Result has 282 places, 339 transitions, 4361 flow [2024-06-20 17:19:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4361, PETRI_PLACES=282, PETRI_TRANSITIONS=339} [2024-06-20 17:19:54,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 17:19:54,962 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 339 transitions, 4361 flow [2024-06-20 17:19:54,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:54,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:54,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:54,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:19:54,962 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:54,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash 618771125, now seen corresponding path program 7 times [2024-06-20 17:19:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888445981] [2024-06-20 17:19:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:54,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888445981] [2024-06-20 17:19:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888445981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:57,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:57,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:57,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880791233] [2024-06-20 17:19:57,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:57,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:57,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:57,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:19:57,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 339 transitions, 4361 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:57,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:57,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:19:57,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:59,021 INFO L124 PetriNetUnfolderBase]: 2338/3831 cut-off events. [2024-06-20 17:19:59,022 INFO L125 PetriNetUnfolderBase]: For 223007/223013 co-relation queries the response was YES. [2024-06-20 17:19:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26407 conditions, 3831 events. 2338/3831 cut-off events. For 223007/223013 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22689 event pairs, 411 based on Foata normal form. 8/3838 useless extension candidates. Maximal degree in co-relation 26277. Up to 3255 conditions per place. [2024-06-20 17:19:59,067 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 281 selfloop transitions, 81 changer transitions 0/367 dead transitions. [2024-06-20 17:19:59,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 367 transitions, 5355 flow [2024-06-20 17:19:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:19:59,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 17:19:59,068 INFO L175 Difference]: Start difference. First operand has 282 places, 339 transitions, 4361 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:19:59,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 367 transitions, 5355 flow [2024-06-20 17:19:59,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 367 transitions, 5060 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:59,780 INFO L231 Difference]: Finished difference. Result has 283 places, 341 transitions, 4281 flow [2024-06-20 17:19:59,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4281, PETRI_PLACES=283, PETRI_TRANSITIONS=341} [2024-06-20 17:19:59,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-20 17:19:59,780 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 341 transitions, 4281 flow [2024-06-20 17:19:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:59,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:59,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:59,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:19:59,781 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:59,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2085523831, now seen corresponding path program 8 times [2024-06-20 17:19:59,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:59,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202579288] [2024-06-20 17:19:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:59,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:02,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202579288] [2024-06-20 17:20:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202579288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:02,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:02,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703421671] [2024-06-20 17:20:02,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:02,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:02,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:02,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:02,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:02,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 341 transitions, 4281 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:02,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:02,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:02,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:04,637 INFO L124 PetriNetUnfolderBase]: 2348/3843 cut-off events. [2024-06-20 17:20:04,637 INFO L125 PetriNetUnfolderBase]: For 226168/226168 co-relation queries the response was YES. [2024-06-20 17:20:04,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26088 conditions, 3843 events. 2348/3843 cut-off events. For 226168/226168 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 22873 event pairs, 522 based on Foata normal form. 2/3843 useless extension candidates. Maximal degree in co-relation 25959. Up to 3335 conditions per place. [2024-06-20 17:20:04,683 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 107 changer transitions 0/377 dead transitions. [2024-06-20 17:20:04,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 377 transitions, 5319 flow [2024-06-20 17:20:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:20:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:20:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-20 17:20:04,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-20 17:20:04,684 INFO L175 Difference]: Start difference. First operand has 283 places, 341 transitions, 4281 flow. Second operand 11 states and 178 transitions. [2024-06-20 17:20:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 377 transitions, 5319 flow [2024-06-20 17:20:05,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 377 transitions, 5181 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:05,410 INFO L231 Difference]: Finished difference. Result has 289 places, 344 transitions, 4413 flow [2024-06-20 17:20:05,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4413, PETRI_PLACES=289, PETRI_TRANSITIONS=344} [2024-06-20 17:20:05,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-20 17:20:05,411 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 344 transitions, 4413 flow [2024-06-20 17:20:05,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:05,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:05,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:05,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:20:05,411 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:05,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1889832575, now seen corresponding path program 9 times [2024-06-20 17:20:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:05,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235665015] [2024-06-20 17:20:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:08,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235665015] [2024-06-20 17:20:08,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235665015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:08,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:08,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:08,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038349856] [2024-06-20 17:20:08,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:08,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:08,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:08,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 344 transitions, 4413 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:08,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:08,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:08,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:10,341 INFO L124 PetriNetUnfolderBase]: 2374/3881 cut-off events. [2024-06-20 17:20:10,341 INFO L125 PetriNetUnfolderBase]: For 238241/238241 co-relation queries the response was YES. [2024-06-20 17:20:10,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26606 conditions, 3881 events. 2374/3881 cut-off events. For 238241/238241 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23094 event pairs, 526 based on Foata normal form. 2/3881 useless extension candidates. Maximal degree in co-relation 26476. Up to 3360 conditions per place. [2024-06-20 17:20:10,384 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 108 changer transitions 0/380 dead transitions. [2024-06-20 17:20:10,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 380 transitions, 5667 flow [2024-06-20 17:20:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 17:20:10,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-20 17:20:10,386 INFO L175 Difference]: Start difference. First operand has 289 places, 344 transitions, 4413 flow. Second operand 10 states and 166 transitions. [2024-06-20 17:20:10,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 380 transitions, 5667 flow [2024-06-20 17:20:11,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 380 transitions, 5331 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-20 17:20:11,143 INFO L231 Difference]: Finished difference. Result has 290 places, 350 transitions, 4411 flow [2024-06-20 17:20:11,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4411, PETRI_PLACES=290, PETRI_TRANSITIONS=350} [2024-06-20 17:20:11,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 17:20:11,143 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 350 transitions, 4411 flow [2024-06-20 17:20:11,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:11,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:11,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:11,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:20:11,144 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:11,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1120016011, now seen corresponding path program 8 times [2024-06-20 17:20:11,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:11,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113443051] [2024-06-20 17:20:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:11,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:13,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:13,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113443051] [2024-06-20 17:20:13,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113443051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:13,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:13,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793799179] [2024-06-20 17:20:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:13,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:13,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 350 transitions, 4411 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:13,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:13,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:13,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:15,257 INFO L124 PetriNetUnfolderBase]: 2395/3916 cut-off events. [2024-06-20 17:20:15,258 INFO L125 PetriNetUnfolderBase]: For 248784/248790 co-relation queries the response was YES. [2024-06-20 17:20:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26843 conditions, 3916 events. 2395/3916 cut-off events. For 248784/248790 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23355 event pairs, 513 based on Foata normal form. 8/3923 useless extension candidates. Maximal degree in co-relation 26712. Up to 3534 conditions per place. [2024-06-20 17:20:15,300 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 64 changer transitions 0/375 dead transitions. [2024-06-20 17:20:15,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 375 transitions, 5421 flow [2024-06-20 17:20:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 17:20:15,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 17:20:15,302 INFO L175 Difference]: Start difference. First operand has 290 places, 350 transitions, 4411 flow. Second operand 8 states and 129 transitions. [2024-06-20 17:20:15,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 375 transitions, 5421 flow [2024-06-20 17:20:16,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 375 transitions, 5208 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:16,145 INFO L231 Difference]: Finished difference. Result has 293 places, 354 transitions, 4407 flow [2024-06-20 17:20:16,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4407, PETRI_PLACES=293, PETRI_TRANSITIONS=354} [2024-06-20 17:20:16,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-20 17:20:16,146 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 354 transitions, 4407 flow [2024-06-20 17:20:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:16,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:16,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:20:16,146 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:16,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash -928099181, now seen corresponding path program 9 times [2024-06-20 17:20:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679065124] [2024-06-20 17:20:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:18,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:18,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679065124] [2024-06-20 17:20:18,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679065124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:18,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:18,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213553632] [2024-06-20 17:20:18,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:18,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:18,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:18,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:18,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:18,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 354 transitions, 4407 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:18,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:18,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:18,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:20,560 INFO L124 PetriNetUnfolderBase]: 2390/3913 cut-off events. [2024-06-20 17:20:20,560 INFO L125 PetriNetUnfolderBase]: For 248009/248015 co-relation queries the response was YES. [2024-06-20 17:20:20,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26651 conditions, 3913 events. 2390/3913 cut-off events. For 248009/248015 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23356 event pairs, 518 based on Foata normal form. 8/3920 useless extension candidates. Maximal degree in co-relation 26518. Up to 3556 conditions per place. [2024-06-20 17:20:20,600 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 311 selfloop transitions, 57 changer transitions 0/373 dead transitions. [2024-06-20 17:20:20,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 373 transitions, 5197 flow [2024-06-20 17:20:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:20:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 17:20:20,601 INFO L175 Difference]: Start difference. First operand has 293 places, 354 transitions, 4407 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:20:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 373 transitions, 5197 flow [2024-06-20 17:20:21,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 373 transitions, 5052 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:21,449 INFO L231 Difference]: Finished difference. Result has 296 places, 354 transitions, 4381 flow [2024-06-20 17:20:21,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4381, PETRI_PLACES=296, PETRI_TRANSITIONS=354} [2024-06-20 17:20:21,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-20 17:20:21,450 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 354 transitions, 4381 flow [2024-06-20 17:20:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:21,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:21,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:21,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:20:21,450 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:21,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1889822345, now seen corresponding path program 10 times [2024-06-20 17:20:21,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:21,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602062039] [2024-06-20 17:20:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:21,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602062039] [2024-06-20 17:20:24,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602062039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:24,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:24,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:24,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186183349] [2024-06-20 17:20:24,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:24,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:24,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:24,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:24,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:24,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 354 transitions, 4381 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:24,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:24,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:24,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:26,477 INFO L124 PetriNetUnfolderBase]: 2384/3895 cut-off events. [2024-06-20 17:20:26,477 INFO L125 PetriNetUnfolderBase]: For 246931/246931 co-relation queries the response was YES. [2024-06-20 17:20:26,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26434 conditions, 3895 events. 2384/3895 cut-off events. For 246931/246931 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23187 event pairs, 525 based on Foata normal form. 2/3895 useless extension candidates. Maximal degree in co-relation 26300. Up to 3379 conditions per place. [2024-06-20 17:20:26,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 109 changer transitions 0/386 dead transitions. [2024-06-20 17:20:26,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 386 transitions, 5391 flow [2024-06-20 17:20:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:20:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:20:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-20 17:20:26,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-20 17:20:26,526 INFO L175 Difference]: Start difference. First operand has 296 places, 354 transitions, 4381 flow. Second operand 12 states and 190 transitions. [2024-06-20 17:20:26,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 386 transitions, 5391 flow [2024-06-20 17:20:27,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 386 transitions, 5240 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:27,334 INFO L231 Difference]: Finished difference. Result has 301 places, 354 transitions, 4454 flow [2024-06-20 17:20:27,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4454, PETRI_PLACES=301, PETRI_TRANSITIONS=354} [2024-06-20 17:20:27,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 17:20:27,335 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 354 transitions, 4454 flow [2024-06-20 17:20:27,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:27,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:27,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:20:27,335 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:27,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash -928104823, now seen corresponding path program 11 times [2024-06-20 17:20:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:27,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647948071] [2024-06-20 17:20:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:30,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647948071] [2024-06-20 17:20:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647948071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:30,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962798068] [2024-06-20 17:20:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:30,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:30,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:30,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 354 transitions, 4454 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:30,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:30,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:32,317 INFO L124 PetriNetUnfolderBase]: 2410/3939 cut-off events. [2024-06-20 17:20:32,317 INFO L125 PetriNetUnfolderBase]: For 259405/259405 co-relation queries the response was YES. [2024-06-20 17:20:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26991 conditions, 3939 events. 2410/3939 cut-off events. For 259405/259405 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23486 event pairs, 529 based on Foata normal form. 2/3939 useless extension candidates. Maximal degree in co-relation 26856. Up to 3449 conditions per place. [2024-06-20 17:20:32,359 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 103 changer transitions 0/385 dead transitions. [2024-06-20 17:20:32,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 385 transitions, 5532 flow [2024-06-20 17:20:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:20:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:20:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-20 17:20:32,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-20 17:20:32,361 INFO L175 Difference]: Start difference. First operand has 301 places, 354 transitions, 4454 flow. Second operand 11 states and 170 transitions. [2024-06-20 17:20:32,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 385 transitions, 5532 flow [2024-06-20 17:20:33,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 385 transitions, 5294 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 17:20:33,246 INFO L231 Difference]: Finished difference. Result has 301 places, 360 transitions, 4524 flow [2024-06-20 17:20:33,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4228, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4524, PETRI_PLACES=301, PETRI_TRANSITIONS=360} [2024-06-20 17:20:33,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 17:20:33,246 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 360 transitions, 4524 flow [2024-06-20 17:20:33,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:33,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:33,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:20:33,247 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:33,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -916130143, now seen corresponding path program 12 times [2024-06-20 17:20:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:33,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201432592] [2024-06-20 17:20:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:33,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:36,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:36,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201432592] [2024-06-20 17:20:36,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201432592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:36,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:36,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839464582] [2024-06-20 17:20:36,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:36,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:36,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:36,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:36,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 360 transitions, 4524 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:36,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:36,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:36,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:38,198 INFO L124 PetriNetUnfolderBase]: 2420/3955 cut-off events. [2024-06-20 17:20:38,198 INFO L125 PetriNetUnfolderBase]: For 265354/265354 co-relation queries the response was YES. [2024-06-20 17:20:38,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27166 conditions, 3955 events. 2420/3955 cut-off events. For 265354/265354 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23620 event pairs, 494 based on Foata normal form. 2/3955 useless extension candidates. Maximal degree in co-relation 27030. Up to 3113 conditions per place. [2024-06-20 17:20:38,245 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 204 changer transitions 0/392 dead transitions. [2024-06-20 17:20:38,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 392 transitions, 5830 flow [2024-06-20 17:20:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:20:38,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:20:38,246 INFO L175 Difference]: Start difference. First operand has 301 places, 360 transitions, 4524 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:20:38,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 392 transitions, 5830 flow [2024-06-20 17:20:39,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 392 transitions, 5686 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:39,364 INFO L231 Difference]: Finished difference. Result has 303 places, 366 transitions, 4936 flow [2024-06-20 17:20:39,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4936, PETRI_PLACES=303, PETRI_TRANSITIONS=366} [2024-06-20 17:20:39,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-20 17:20:39,364 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 366 transitions, 4936 flow [2024-06-20 17:20:39,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:39,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:39,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:39,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:20:39,365 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:39,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash -928094593, now seen corresponding path program 13 times [2024-06-20 17:20:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:39,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367917905] [2024-06-20 17:20:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:39,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:42,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367917905] [2024-06-20 17:20:42,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367917905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:42,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:42,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:42,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000679794] [2024-06-20 17:20:42,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:42,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:42,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:42,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:42,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 366 transitions, 4936 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:42,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:42,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:42,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:44,062 INFO L124 PetriNetUnfolderBase]: 2414/3951 cut-off events. [2024-06-20 17:20:44,062 INFO L125 PetriNetUnfolderBase]: For 268305/268305 co-relation queries the response was YES. [2024-06-20 17:20:44,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27933 conditions, 3951 events. 2414/3951 cut-off events. For 268305/268305 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23630 event pairs, 531 based on Foata normal form. 2/3951 useless extension candidates. Maximal degree in co-relation 27795. Up to 3458 conditions per place. [2024-06-20 17:20:44,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 102 changer transitions 0/387 dead transitions. [2024-06-20 17:20:44,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 387 transitions, 5758 flow [2024-06-20 17:20:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:20:44,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 17:20:44,109 INFO L175 Difference]: Start difference. First operand has 303 places, 366 transitions, 4936 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:20:44,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 387 transitions, 5758 flow [2024-06-20 17:20:45,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 387 transitions, 5528 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:45,076 INFO L231 Difference]: Finished difference. Result has 307 places, 366 transitions, 4916 flow [2024-06-20 17:20:45,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=307, PETRI_TRANSITIONS=366} [2024-06-20 17:20:45,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:20:45,077 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 366 transitions, 4916 flow [2024-06-20 17:20:45,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:45,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:45,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:20:45,077 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:45,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2129274775, now seen corresponding path program 10 times [2024-06-20 17:20:45,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253128892] [2024-06-20 17:20:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:47,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:47,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253128892] [2024-06-20 17:20:47,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253128892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:47,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445385107] [2024-06-20 17:20:47,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:47,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:47,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:47,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 366 transitions, 4916 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:47,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:47,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:47,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:49,342 INFO L124 PetriNetUnfolderBase]: 2409/3936 cut-off events. [2024-06-20 17:20:49,342 INFO L125 PetriNetUnfolderBase]: For 260539/260539 co-relation queries the response was YES. [2024-06-20 17:20:49,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27176 conditions, 3936 events. 2409/3936 cut-off events. For 260539/260539 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23494 event pairs, 524 based on Foata normal form. 2/3936 useless extension candidates. Maximal degree in co-relation 27036. Up to 3520 conditions per place. [2024-06-20 17:20:49,393 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 65 changer transitions 0/392 dead transitions. [2024-06-20 17:20:49,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 392 transitions, 5768 flow [2024-06-20 17:20:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:20:49,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:20:49,394 INFO L175 Difference]: Start difference. First operand has 307 places, 366 transitions, 4916 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:20:49,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 392 transitions, 5768 flow [2024-06-20 17:20:50,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 392 transitions, 5550 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:20:50,392 INFO L231 Difference]: Finished difference. Result has 306 places, 366 transitions, 4837 flow [2024-06-20 17:20:50,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4837, PETRI_PLACES=306, PETRI_TRANSITIONS=366} [2024-06-20 17:20:50,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 17:20:50,393 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 366 transitions, 4837 flow [2024-06-20 17:20:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:50,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:50,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:50,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:20:50,394 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:50,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash 925813301, now seen corresponding path program 11 times [2024-06-20 17:20:50,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960787116] [2024-06-20 17:20:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:53,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960787116] [2024-06-20 17:20:53,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960787116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:53,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:53,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404018036] [2024-06-20 17:20:53,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:53,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:53,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:53,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:53,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 366 transitions, 4837 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:53,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:53,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:53,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:55,494 INFO L124 PetriNetUnfolderBase]: 2404/3929 cut-off events. [2024-06-20 17:20:55,495 INFO L125 PetriNetUnfolderBase]: For 258414/258414 co-relation queries the response was YES. [2024-06-20 17:20:55,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26959 conditions, 3929 events. 2404/3929 cut-off events. For 258414/258414 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23449 event pairs, 498 based on Foata normal form. 2/3930 useless extension candidates. Maximal degree in co-relation 26818. Up to 3309 conditions per place. [2024-06-20 17:20:55,538 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 74 changer transitions 0/409 dead transitions. [2024-06-20 17:20:55,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 409 transitions, 5811 flow [2024-06-20 17:20:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:20:55,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:20:55,539 INFO L175 Difference]: Start difference. First operand has 306 places, 366 transitions, 4837 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:20:55,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 409 transitions, 5811 flow [2024-06-20 17:20:56,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 409 transitions, 5635 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:56,520 INFO L231 Difference]: Finished difference. Result has 308 places, 366 transitions, 4833 flow [2024-06-20 17:20:56,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4833, PETRI_PLACES=308, PETRI_TRANSITIONS=366} [2024-06-20 17:20:56,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 17:20:56,523 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 366 transitions, 4833 flow [2024-06-20 17:20:56,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:56,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:56,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:20:56,524 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:56,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1813960931, now seen corresponding path program 12 times [2024-06-20 17:20:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:56,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13649522] [2024-06-20 17:20:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:56,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13649522] [2024-06-20 17:20:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13649522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:59,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696959422] [2024-06-20 17:20:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:59,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:59,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:59,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:20:59,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 366 transitions, 4833 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:59,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:59,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:20:59,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:00,808 INFO L124 PetriNetUnfolderBase]: 2399/3924 cut-off events. [2024-06-20 17:21:00,808 INFO L125 PetriNetUnfolderBase]: For 256747/256747 co-relation queries the response was YES. [2024-06-20 17:21:00,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26901 conditions, 3924 events. 2399/3924 cut-off events. For 256747/256747 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23378 event pairs, 413 based on Foata normal form. 2/3924 useless extension candidates. Maximal degree in co-relation 26760. Up to 3206 conditions per place. [2024-06-20 17:21:00,859 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 82 changer transitions 0/396 dead transitions. [2024-06-20 17:21:00,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 396 transitions, 5741 flow [2024-06-20 17:21:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:21:00,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 17:21:00,862 INFO L175 Difference]: Start difference. First operand has 308 places, 366 transitions, 4833 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:21:00,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 396 transitions, 5741 flow [2024-06-20 17:21:01,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 396 transitions, 5584 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:01,898 INFO L231 Difference]: Finished difference. Result has 307 places, 366 transitions, 4848 flow [2024-06-20 17:21:01,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4676, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4848, PETRI_PLACES=307, PETRI_TRANSITIONS=366} [2024-06-20 17:21:01,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:21:01,898 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 366 transitions, 4848 flow [2024-06-20 17:21:01,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:01,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:01,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:01,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:21:01,899 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:01,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash 925807659, now seen corresponding path program 14 times [2024-06-20 17:21:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:01,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843135378] [2024-06-20 17:21:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:05,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:05,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843135378] [2024-06-20 17:21:05,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843135378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:05,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:05,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:05,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720632023] [2024-06-20 17:21:05,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:05,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:05,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:05,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:05,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:05,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:05,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 366 transitions, 4848 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:05,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:05,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:05,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:07,437 INFO L124 PetriNetUnfolderBase]: 2409/3942 cut-off events. [2024-06-20 17:21:07,437 INFO L125 PetriNetUnfolderBase]: For 252036/252036 co-relation queries the response was YES. [2024-06-20 17:21:07,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26977 conditions, 3942 events. 2409/3942 cut-off events. For 252036/252036 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23571 event pairs, 481 based on Foata normal form. 2/3943 useless extension candidates. Maximal degree in co-relation 26836. Up to 3320 conditions per place. [2024-06-20 17:21:07,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 144 changer transitions 0/420 dead transitions. [2024-06-20 17:21:07,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 420 transitions, 6381 flow [2024-06-20 17:21:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:21:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:21:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 221 transitions. [2024-06-20 17:21:07,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:21:07,485 INFO L175 Difference]: Start difference. First operand has 307 places, 366 transitions, 4848 flow. Second operand 13 states and 221 transitions. [2024-06-20 17:21:07,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 420 transitions, 6381 flow [2024-06-20 17:21:08,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 420 transitions, 6166 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:08,466 INFO L231 Difference]: Finished difference. Result has 313 places, 369 transitions, 4982 flow [2024-06-20 17:21:08,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4633, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4982, PETRI_PLACES=313, PETRI_TRANSITIONS=369} [2024-06-20 17:21:08,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 17:21:08,466 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 369 transitions, 4982 flow [2024-06-20 17:21:08,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:08,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:08,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:08,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:21:08,467 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:08,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2133892163, now seen corresponding path program 15 times [2024-06-20 17:21:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:08,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972987510] [2024-06-20 17:21:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:08,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:11,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972987510] [2024-06-20 17:21:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972987510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:11,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:11,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831036997] [2024-06-20 17:21:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:11,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:11,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:11,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 369 transitions, 4982 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:11,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:11,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:11,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:13,312 INFO L124 PetriNetUnfolderBase]: 2435/3988 cut-off events. [2024-06-20 17:21:13,312 INFO L125 PetriNetUnfolderBase]: For 266049/266049 co-relation queries the response was YES. [2024-06-20 17:21:13,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27612 conditions, 3988 events. 2435/3988 cut-off events. For 266049/266049 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23949 event pairs, 500 based on Foata normal form. 2/3988 useless extension candidates. Maximal degree in co-relation 27470. Up to 3258 conditions per place. [2024-06-20 17:21:13,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 156 changer transitions 0/400 dead transitions. [2024-06-20 17:21:13,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 400 transitions, 6309 flow [2024-06-20 17:21:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:21:13,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:21:13,358 INFO L175 Difference]: Start difference. First operand has 313 places, 369 transitions, 4982 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:21:13,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 400 transitions, 6309 flow [2024-06-20 17:21:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 400 transitions, 5802 flow, removed 18 selfloop flow, removed 14 redundant places. [2024-06-20 17:21:14,421 INFO L231 Difference]: Finished difference. Result has 307 places, 375 transitions, 4924 flow [2024-06-20 17:21:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4924, PETRI_PLACES=307, PETRI_TRANSITIONS=375} [2024-06-20 17:21:14,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:21:14,421 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 375 transitions, 4924 flow [2024-06-20 17:21:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:14,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:14,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:21:14,422 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:14,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1994841353, now seen corresponding path program 16 times [2024-06-20 17:21:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:14,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235558241] [2024-06-20 17:21:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:17,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:17,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235558241] [2024-06-20 17:21:17,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235558241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:17,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:17,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:17,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355398035] [2024-06-20 17:21:17,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:17,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:17,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:17,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:17,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 375 transitions, 4924 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:17,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:17,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:17,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:19,670 INFO L124 PetriNetUnfolderBase]: 2445/4006 cut-off events. [2024-06-20 17:21:19,670 INFO L125 PetriNetUnfolderBase]: For 266011/266011 co-relation queries the response was YES. [2024-06-20 17:21:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27439 conditions, 4006 events. 2445/4006 cut-off events. For 266011/266011 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24084 event pairs, 484 based on Foata normal form. 2/4006 useless extension candidates. Maximal degree in co-relation 27298. Up to 3268 conditions per place. [2024-06-20 17:21:19,717 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 165 changer transitions 0/405 dead transitions. [2024-06-20 17:21:19,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 405 transitions, 6214 flow [2024-06-20 17:21:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:21:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:21:19,719 INFO L175 Difference]: Start difference. First operand has 307 places, 375 transitions, 4924 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:21:19,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 405 transitions, 6214 flow [2024-06-20 17:21:20,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 405 transitions, 5856 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:20,835 INFO L231 Difference]: Finished difference. Result has 312 places, 378 transitions, 4978 flow [2024-06-20 17:21:20,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4978, PETRI_PLACES=312, PETRI_TRANSITIONS=378} [2024-06-20 17:21:20,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-20 17:21:20,836 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 378 transitions, 4978 flow [2024-06-20 17:21:20,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:20,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:20,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:21:20,836 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:20,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 925817889, now seen corresponding path program 17 times [2024-06-20 17:21:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190878441] [2024-06-20 17:21:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:24,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:24,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190878441] [2024-06-20 17:21:24,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190878441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:24,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:24,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110746127] [2024-06-20 17:21:24,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:24,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:24,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:24,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 378 transitions, 4978 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:24,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:24,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:25,875 INFO L124 PetriNetUnfolderBase]: 2439/4000 cut-off events. [2024-06-20 17:21:25,875 INFO L125 PetriNetUnfolderBase]: For 262950/262950 co-relation queries the response was YES. [2024-06-20 17:21:25,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27215 conditions, 4000 events. 2439/4000 cut-off events. For 262950/262950 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24037 event pairs, 487 based on Foata normal form. 2/4001 useless extension candidates. Maximal degree in co-relation 27073. Up to 3358 conditions per place. [2024-06-20 17:21:25,928 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 140 changer transitions 0/423 dead transitions. [2024-06-20 17:21:25,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 423 transitions, 6288 flow [2024-06-20 17:21:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:21:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:21:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-20 17:21:25,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:21:25,930 INFO L175 Difference]: Start difference. First operand has 312 places, 378 transitions, 4978 flow. Second operand 12 states and 204 transitions. [2024-06-20 17:21:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 423 transitions, 6288 flow [2024-06-20 17:21:26,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 423 transitions, 5832 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:26,850 INFO L231 Difference]: Finished difference. Result has 316 places, 378 transitions, 4812 flow [2024-06-20 17:21:26,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4812, PETRI_PLACES=316, PETRI_TRANSITIONS=378} [2024-06-20 17:21:26,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 17:21:26,850 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 378 transitions, 4812 flow [2024-06-20 17:21:26,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:26,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:26,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:26,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:21:26,851 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:26,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1032923793, now seen corresponding path program 18 times [2024-06-20 17:21:26,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:26,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101473451] [2024-06-20 17:21:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:29,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:29,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101473451] [2024-06-20 17:21:29,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101473451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:29,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:29,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38345422] [2024-06-20 17:21:29,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:29,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:29,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:29,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:29,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 378 transitions, 4812 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:29,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:29,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:29,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:32,013 INFO L124 PetriNetUnfolderBase]: 2433/3986 cut-off events. [2024-06-20 17:21:32,014 INFO L125 PetriNetUnfolderBase]: For 258872/258872 co-relation queries the response was YES. [2024-06-20 17:21:32,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26803 conditions, 3986 events. 2433/3986 cut-off events. For 258872/258872 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23928 event pairs, 473 based on Foata normal form. 2/3986 useless extension candidates. Maximal degree in co-relation 26660. Up to 3258 conditions per place. [2024-06-20 17:21:32,063 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 167 changer transitions 0/406 dead transitions. [2024-06-20 17:21:32,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 406 transitions, 5862 flow [2024-06-20 17:21:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:21:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:21:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-20 17:21:32,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-20 17:21:32,065 INFO L175 Difference]: Start difference. First operand has 316 places, 378 transitions, 4812 flow. Second operand 11 states and 178 transitions. [2024-06-20 17:21:32,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 406 transitions, 5862 flow [2024-06-20 17:21:33,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 406 transitions, 5587 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 17:21:33,268 INFO L231 Difference]: Finished difference. Result has 317 places, 378 transitions, 4879 flow [2024-06-20 17:21:33,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4879, PETRI_PLACES=317, PETRI_TRANSITIONS=378} [2024-06-20 17:21:33,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:21:33,269 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 378 transitions, 4879 flow [2024-06-20 17:21:33,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:33,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:33,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:33,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:21:33,270 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:33,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2121917483, now seen corresponding path program 19 times [2024-06-20 17:21:33,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:33,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399635117] [2024-06-20 17:21:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399635117] [2024-06-20 17:21:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399635117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053504348] [2024-06-20 17:21:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:36,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:36,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 378 transitions, 4879 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:36,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:36,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:36,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:38,362 INFO L124 PetriNetUnfolderBase]: 2443/4004 cut-off events. [2024-06-20 17:21:38,362 INFO L125 PetriNetUnfolderBase]: For 259640/259640 co-relation queries the response was YES. [2024-06-20 17:21:38,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26981 conditions, 4004 events. 2443/4004 cut-off events. For 259640/259640 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24125 event pairs, 532 based on Foata normal form. 2/4004 useless extension candidates. Maximal degree in co-relation 26838. Up to 3532 conditions per place. [2024-06-20 17:21:38,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 80 changer transitions 0/413 dead transitions. [2024-06-20 17:21:38,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 413 transitions, 6015 flow [2024-06-20 17:21:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 17:21:38,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-20 17:21:38,410 INFO L175 Difference]: Start difference. First operand has 317 places, 378 transitions, 4879 flow. Second operand 10 states and 166 transitions. [2024-06-20 17:21:38,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 413 transitions, 6015 flow [2024-06-20 17:21:39,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 413 transitions, 5344 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-20 17:21:39,702 INFO L231 Difference]: Finished difference. Result has 315 places, 381 transitions, 4428 flow [2024-06-20 17:21:39,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4428, PETRI_PLACES=315, PETRI_TRANSITIONS=381} [2024-06-20 17:21:39,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-20 17:21:39,703 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 381 transitions, 4428 flow [2024-06-20 17:21:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:39,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:39,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:21:39,703 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:39,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash 932127009, now seen corresponding path program 20 times [2024-06-20 17:21:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:39,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423321886] [2024-06-20 17:21:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:39,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423321886] [2024-06-20 17:21:42,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423321886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:42,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314699243] [2024-06-20 17:21:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:42,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:42,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:42,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 381 transitions, 4428 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:42,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:42,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:42,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:44,473 INFO L124 PetriNetUnfolderBase]: 2437/3990 cut-off events. [2024-06-20 17:21:44,474 INFO L125 PetriNetUnfolderBase]: For 255091/255091 co-relation queries the response was YES. [2024-06-20 17:21:44,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25597 conditions, 3990 events. 2437/3990 cut-off events. For 255091/255091 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23935 event pairs, 491 based on Foata normal form. 2/3991 useless extension candidates. Maximal degree in co-relation 25455. Up to 3611 conditions per place. [2024-06-20 17:21:44,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 51 changer transitions 0/406 dead transitions. [2024-06-20 17:21:44,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 406 transitions, 5300 flow [2024-06-20 17:21:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:21:44,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 17:21:44,524 INFO L175 Difference]: Start difference. First operand has 315 places, 381 transitions, 4428 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:21:44,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 406 transitions, 5300 flow [2024-06-20 17:21:45,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 406 transitions, 4986 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-20 17:21:45,576 INFO L231 Difference]: Finished difference. Result has 312 places, 381 transitions, 4226 flow [2024-06-20 17:21:45,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4114, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4226, PETRI_PLACES=312, PETRI_TRANSITIONS=381} [2024-06-20 17:21:45,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-20 17:21:45,577 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 381 transitions, 4226 flow [2024-06-20 17:21:45,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:45,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:45,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:45,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:21:45,577 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:45,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash 932246979, now seen corresponding path program 21 times [2024-06-20 17:21:45,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:45,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523086595] [2024-06-20 17:21:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:45,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:48,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:48,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523086595] [2024-06-20 17:21:48,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523086595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:48,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:48,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:48,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345639574] [2024-06-20 17:21:48,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:48,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:48,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:48,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:48,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 381 transitions, 4226 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:48,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:48,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:48,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:50,307 INFO L124 PetriNetUnfolderBase]: 2431/3990 cut-off events. [2024-06-20 17:21:50,307 INFO L125 PetriNetUnfolderBase]: For 250327/250327 co-relation queries the response was YES. [2024-06-20 17:21:50,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25244 conditions, 3990 events. 2431/3990 cut-off events. For 250327/250327 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 23994 event pairs, 490 based on Foata normal form. 2/3991 useless extension candidates. Maximal degree in co-relation 25101. Up to 3350 conditions per place. [2024-06-20 17:21:50,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 143 changer transitions 0/417 dead transitions. [2024-06-20 17:21:50,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 417 transitions, 5330 flow [2024-06-20 17:21:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 17:21:50,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-20 17:21:50,358 INFO L175 Difference]: Start difference. First operand has 312 places, 381 transitions, 4226 flow. Second operand 10 states and 171 transitions. [2024-06-20 17:21:50,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 417 transitions, 5330 flow [2024-06-20 17:21:51,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 417 transitions, 5074 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:51,484 INFO L231 Difference]: Finished difference. Result has 314 places, 381 transitions, 4266 flow [2024-06-20 17:21:51,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4266, PETRI_PLACES=314, PETRI_TRANSITIONS=381} [2024-06-20 17:21:51,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 17:21:51,484 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 381 transitions, 4266 flow [2024-06-20 17:21:51,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:51,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:51,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:51,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:21:51,485 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:51,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:51,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2121927713, now seen corresponding path program 22 times [2024-06-20 17:21:51,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:51,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873561666] [2024-06-20 17:21:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:54,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:54,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873561666] [2024-06-20 17:21:54,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873561666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:54,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:54,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129910852] [2024-06-20 17:21:54,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:54,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:54,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:54,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:54,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 381 transitions, 4266 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:54,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:54,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:54,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:55,975 INFO L124 PetriNetUnfolderBase]: 2425/3978 cut-off events. [2024-06-20 17:21:55,975 INFO L125 PetriNetUnfolderBase]: For 247517/247517 co-relation queries the response was YES. [2024-06-20 17:21:56,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25136 conditions, 3978 events. 2425/3978 cut-off events. For 247517/247517 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 23890 event pairs, 530 based on Foata normal form. 2/3978 useless extension candidates. Maximal degree in co-relation 24993. Up to 3511 conditions per place. [2024-06-20 17:21:56,028 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 77 changer transitions 0/406 dead transitions. [2024-06-20 17:21:56,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 406 transitions, 5142 flow [2024-06-20 17:21:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:21:56,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:21:56,030 INFO L175 Difference]: Start difference. First operand has 314 places, 381 transitions, 4266 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:21:56,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 406 transitions, 5142 flow [2024-06-20 17:21:57,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 406 transitions, 4789 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-20 17:21:57,107 INFO L231 Difference]: Finished difference. Result has 311 places, 381 transitions, 4073 flow [2024-06-20 17:21:57,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4073, PETRI_PLACES=311, PETRI_TRANSITIONS=381} [2024-06-20 17:21:57,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-20 17:21:57,107 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 381 transitions, 4073 flow [2024-06-20 17:21:57,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:57,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:57,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:57,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:21:57,108 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:57,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1421352010, now seen corresponding path program 1 times [2024-06-20 17:21:57,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:57,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112296320] [2024-06-20 17:21:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:59,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112296320] [2024-06-20 17:21:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112296320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:59,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:59,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:59,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185130863] [2024-06-20 17:21:59,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:59,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:59,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:59,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:21:59,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 381 transitions, 4073 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:59,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:59,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:21:59,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:01,321 INFO L124 PetriNetUnfolderBase]: 2769/4571 cut-off events. [2024-06-20 17:22:01,321 INFO L125 PetriNetUnfolderBase]: For 326431/326431 co-relation queries the response was YES. [2024-06-20 17:22:01,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29469 conditions, 4571 events. 2769/4571 cut-off events. For 326431/326431 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28557 event pairs, 585 based on Foata normal form. 6/4576 useless extension candidates. Maximal degree in co-relation 29326. Up to 3731 conditions per place. [2024-06-20 17:22:01,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 407 selfloop transitions, 66 changer transitions 0/478 dead transitions. [2024-06-20 17:22:01,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 478 transitions, 6063 flow [2024-06-20 17:22:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:22:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:22:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-20 17:22:01,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491869918699187 [2024-06-20 17:22:01,381 INFO L175 Difference]: Start difference. First operand has 311 places, 381 transitions, 4073 flow. Second operand 12 states and 221 transitions. [2024-06-20 17:22:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 478 transitions, 6063 flow [2024-06-20 17:22:02,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 478 transitions, 5887 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:02,773 INFO L231 Difference]: Finished difference. Result has 320 places, 408 transitions, 4477 flow [2024-06-20 17:22:02,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4477, PETRI_PLACES=320, PETRI_TRANSITIONS=408} [2024-06-20 17:22:02,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:22:02,773 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 408 transitions, 4477 flow [2024-06-20 17:22:02,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:02,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:02,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:02,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:22:02,774 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:02,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1923990208, now seen corresponding path program 2 times [2024-06-20 17:22:02,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:02,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243017968] [2024-06-20 17:22:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:02,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:06,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243017968] [2024-06-20 17:22:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243017968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:06,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419293087] [2024-06-20 17:22:06,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:06,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:06,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:06,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 408 transitions, 4477 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:06,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:06,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:06,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:08,137 INFO L124 PetriNetUnfolderBase]: 2868/4728 cut-off events. [2024-06-20 17:22:08,137 INFO L125 PetriNetUnfolderBase]: For 396658/396658 co-relation queries the response was YES. [2024-06-20 17:22:08,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32457 conditions, 4728 events. 2868/4728 cut-off events. For 396658/396658 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29548 event pairs, 496 based on Foata normal form. 6/4733 useless extension candidates. Maximal degree in co-relation 32309. Up to 3393 conditions per place. [2024-06-20 17:22:08,195 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 382 selfloop transitions, 78 changer transitions 0/465 dead transitions. [2024-06-20 17:22:08,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 465 transitions, 6097 flow [2024-06-20 17:22:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 17:22:08,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-20 17:22:08,197 INFO L175 Difference]: Start difference. First operand has 320 places, 408 transitions, 4477 flow. Second operand 10 states and 183 transitions. [2024-06-20 17:22:08,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 465 transitions, 6097 flow [2024-06-20 17:22:09,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 465 transitions, 6055 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:22:09,294 INFO L231 Difference]: Finished difference. Result has 327 places, 411 transitions, 4671 flow [2024-06-20 17:22:09,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4671, PETRI_PLACES=327, PETRI_TRANSITIONS=411} [2024-06-20 17:22:09,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-20 17:22:09,294 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 411 transitions, 4671 flow [2024-06-20 17:22:09,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:09,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:09,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:09,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:22:09,295 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:09,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1641517636, now seen corresponding path program 3 times [2024-06-20 17:22:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:09,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153632487] [2024-06-20 17:22:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:12,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153632487] [2024-06-20 17:22:12,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153632487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:12,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:12,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:12,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044629076] [2024-06-20 17:22:12,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:12,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:12,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:12,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:12,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:12,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 411 transitions, 4671 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:12,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:12,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:12,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:14,627 INFO L124 PetriNetUnfolderBase]: 2842/4677 cut-off events. [2024-06-20 17:22:14,627 INFO L125 PetriNetUnfolderBase]: For 377886/377886 co-relation queries the response was YES. [2024-06-20 17:22:14,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31509 conditions, 4677 events. 2842/4677 cut-off events. For 377886/377886 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29216 event pairs, 567 based on Foata normal form. 12/4688 useless extension candidates. Maximal degree in co-relation 31359. Up to 4160 conditions per place. [2024-06-20 17:22:14,677 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 395 selfloop transitions, 49 changer transitions 0/449 dead transitions. [2024-06-20 17:22:14,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 449 transitions, 5705 flow [2024-06-20 17:22:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:22:14,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 17:22:14,678 INFO L175 Difference]: Start difference. First operand has 327 places, 411 transitions, 4671 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:22:14,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 449 transitions, 5705 flow [2024-06-20 17:22:16,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 449 transitions, 5606 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:16,150 INFO L231 Difference]: Finished difference. Result has 330 places, 411 transitions, 4676 flow [2024-06-20 17:22:16,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4676, PETRI_PLACES=330, PETRI_TRANSITIONS=411} [2024-06-20 17:22:16,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-20 17:22:16,151 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 411 transitions, 4676 flow [2024-06-20 17:22:16,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:16,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:16,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:16,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:22:16,152 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:16,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1099259324, now seen corresponding path program 4 times [2024-06-20 17:22:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771470581] [2024-06-20 17:22:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:19,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:19,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771470581] [2024-06-20 17:22:19,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771470581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:19,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:19,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:19,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140966945] [2024-06-20 17:22:19,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:19,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:19,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:19,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 411 transitions, 4676 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:19,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:19,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:19,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:21,271 INFO L124 PetriNetUnfolderBase]: 2898/4774 cut-off events. [2024-06-20 17:22:21,271 INFO L125 PetriNetUnfolderBase]: For 398834/398834 co-relation queries the response was YES. [2024-06-20 17:22:21,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32195 conditions, 4774 events. 2898/4774 cut-off events. For 398834/398834 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30123 event pairs, 658 based on Foata normal form. 16/4789 useless extension candidates. Maximal degree in co-relation 32044. Up to 3857 conditions per place. [2024-06-20 17:22:21,333 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 394 selfloop transitions, 60 changer transitions 0/459 dead transitions. [2024-06-20 17:22:21,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 459 transitions, 6049 flow [2024-06-20 17:22:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:22:21,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:22:21,335 INFO L175 Difference]: Start difference. First operand has 330 places, 411 transitions, 4676 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:22:21,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 459 transitions, 6049 flow [2024-06-20 17:22:22,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 459 transitions, 5901 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 17:22:22,808 INFO L231 Difference]: Finished difference. Result has 330 places, 413 transitions, 4702 flow [2024-06-20 17:22:22,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=330, PETRI_TRANSITIONS=413} [2024-06-20 17:22:22,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-20 17:22:22,808 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 413 transitions, 4702 flow [2024-06-20 17:22:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:22,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:22,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:22:22,809 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:22,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash 382180032, now seen corresponding path program 5 times [2024-06-20 17:22:22,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:22,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249203916] [2024-06-20 17:22:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:26,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:26,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249203916] [2024-06-20 17:22:26,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249203916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:26,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:26,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:26,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276244015] [2024-06-20 17:22:26,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:26,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:26,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:26,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 413 transitions, 4702 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:26,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:26,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:26,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:27,988 INFO L124 PetriNetUnfolderBase]: 2862/4726 cut-off events. [2024-06-20 17:22:27,989 INFO L125 PetriNetUnfolderBase]: For 337166/337166 co-relation queries the response was YES. [2024-06-20 17:22:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30376 conditions, 4726 events. 2862/4726 cut-off events. For 337166/337166 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 29909 event pairs, 713 based on Foata normal form. 16/4741 useless extension candidates. Maximal degree in co-relation 30224. Up to 4249 conditions per place. [2024-06-20 17:22:28,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 390 selfloop transitions, 55 changer transitions 0/450 dead transitions. [2024-06-20 17:22:28,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 450 transitions, 5754 flow [2024-06-20 17:22:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:22:28,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 17:22:28,053 INFO L175 Difference]: Start difference. First operand has 330 places, 413 transitions, 4702 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:22:28,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 450 transitions, 5754 flow [2024-06-20 17:22:29,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 450 transitions, 5597 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:29,467 INFO L231 Difference]: Finished difference. Result has 332 places, 413 transitions, 4663 flow [2024-06-20 17:22:29,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4663, PETRI_PLACES=332, PETRI_TRANSITIONS=413} [2024-06-20 17:22:29,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 17:22:29,468 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 413 transitions, 4663 flow [2024-06-20 17:22:29,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:29,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:29,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:22:29,468 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:29,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 224923998, now seen corresponding path program 6 times [2024-06-20 17:22:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:29,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294952428] [2024-06-20 17:22:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:29,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:32,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:32,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294952428] [2024-06-20 17:22:32,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294952428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:32,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:32,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:32,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537089405] [2024-06-20 17:22:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:32,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:32,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:32,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 413 transitions, 4663 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:32,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:32,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:32,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:34,667 INFO L124 PetriNetUnfolderBase]: 2936/4828 cut-off events. [2024-06-20 17:22:34,667 INFO L125 PetriNetUnfolderBase]: For 342285/342285 co-relation queries the response was YES. [2024-06-20 17:22:34,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31785 conditions, 4828 events. 2936/4828 cut-off events. For 342285/342285 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 30458 event pairs, 666 based on Foata normal form. 8/4834 useless extension candidates. Maximal degree in co-relation 31632. Up to 4069 conditions per place. [2024-06-20 17:22:34,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 345 selfloop transitions, 108 changer transitions 0/458 dead transitions. [2024-06-20 17:22:34,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 458 transitions, 6025 flow [2024-06-20 17:22:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:22:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:22:34,732 INFO L175 Difference]: Start difference. First operand has 332 places, 413 transitions, 4663 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:22:34,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 458 transitions, 6025 flow [2024-06-20 17:22:36,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 458 transitions, 5866 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 17:22:36,513 INFO L231 Difference]: Finished difference. Result has 332 places, 415 transitions, 4770 flow [2024-06-20 17:22:36,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4770, PETRI_PLACES=332, PETRI_TRANSITIONS=415} [2024-06-20 17:22:36,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 17:22:36,514 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 415 transitions, 4770 flow [2024-06-20 17:22:36,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:36,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:36,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:36,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:22:36,514 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:36,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 232542558, now seen corresponding path program 7 times [2024-06-20 17:22:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:36,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48855277] [2024-06-20 17:22:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:39,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:39,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48855277] [2024-06-20 17:22:39,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48855277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:39,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:39,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572993532] [2024-06-20 17:22:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:39,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:39,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 415 transitions, 4770 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:39,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:39,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:39,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:42,028 INFO L124 PetriNetUnfolderBase]: 2964/4872 cut-off events. [2024-06-20 17:22:42,028 INFO L125 PetriNetUnfolderBase]: For 350498/350498 co-relation queries the response was YES. [2024-06-20 17:22:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32123 conditions, 4872 events. 2964/4872 cut-off events. For 350498/350498 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30747 event pairs, 686 based on Foata normal form. 8/4878 useless extension candidates. Maximal degree in co-relation 31970. Up to 4299 conditions per place. [2024-06-20 17:22:42,093 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 338 selfloop transitions, 107 changer transitions 0/450 dead transitions. [2024-06-20 17:22:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 450 transitions, 5838 flow [2024-06-20 17:22:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:22:42,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 17:22:42,095 INFO L175 Difference]: Start difference. First operand has 332 places, 415 transitions, 4770 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:22:42,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 450 transitions, 5838 flow [2024-06-20 17:22:43,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 450 transitions, 5695 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:43,845 INFO L231 Difference]: Finished difference. Result has 336 places, 416 transitions, 4872 flow [2024-06-20 17:22:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4631, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4872, PETRI_PLACES=336, PETRI_TRANSITIONS=416} [2024-06-20 17:22:43,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-20 17:22:43,846 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 416 transitions, 4872 flow [2024-06-20 17:22:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:43,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:43,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:22:43,847 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:43,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash 490830528, now seen corresponding path program 8 times [2024-06-20 17:22:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:43,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515545442] [2024-06-20 17:22:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:47,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:47,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515545442] [2024-06-20 17:22:47,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515545442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:47,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:47,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270744746] [2024-06-20 17:22:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:47,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:47,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:47,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 416 transitions, 4872 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:47,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:47,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:47,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:49,464 INFO L124 PetriNetUnfolderBase]: 2992/4916 cut-off events. [2024-06-20 17:22:49,464 INFO L125 PetriNetUnfolderBase]: For 357194/357194 co-relation queries the response was YES. [2024-06-20 17:22:49,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32661 conditions, 4916 events. 2992/4916 cut-off events. For 357194/357194 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 31126 event pairs, 689 based on Foata normal form. 8/4922 useless extension candidates. Maximal degree in co-relation 32506. Up to 4343 conditions per place. [2024-06-20 17:22:49,532 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 106 changer transitions 0/447 dead transitions. [2024-06-20 17:22:49,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 447 transitions, 5916 flow [2024-06-20 17:22:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:22:49,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 17:22:49,533 INFO L175 Difference]: Start difference. First operand has 336 places, 416 transitions, 4872 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:22:49,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 447 transitions, 5916 flow [2024-06-20 17:22:51,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 447 transitions, 5701 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:51,411 INFO L231 Difference]: Finished difference. Result has 338 places, 417 transitions, 4898 flow [2024-06-20 17:22:51,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4898, PETRI_PLACES=338, PETRI_TRANSITIONS=417} [2024-06-20 17:22:51,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-20 17:22:51,411 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 417 transitions, 4898 flow [2024-06-20 17:22:51,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:51,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:51,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:51,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:22:51,412 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:51,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 609735360, now seen corresponding path program 9 times [2024-06-20 17:22:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:51,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146021051] [2024-06-20 17:22:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146021051] [2024-06-20 17:22:54,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146021051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:54,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:54,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:54,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003645344] [2024-06-20 17:22:54,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:54,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:54,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:54,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:22:54,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 417 transitions, 4898 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:54,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:54,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:22:54,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:56,689 INFO L124 PetriNetUnfolderBase]: 3020/4966 cut-off events. [2024-06-20 17:22:56,689 INFO L125 PetriNetUnfolderBase]: For 364878/364878 co-relation queries the response was YES. [2024-06-20 17:22:56,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33078 conditions, 4966 events. 3020/4966 cut-off events. For 364878/364878 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31544 event pairs, 706 based on Foata normal form. 8/4973 useless extension candidates. Maximal degree in co-relation 32922. Up to 4552 conditions per place. [2024-06-20 17:22:56,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 394 selfloop transitions, 45 changer transitions 0/444 dead transitions. [2024-06-20 17:22:56,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 444 transitions, 5922 flow [2024-06-20 17:22:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:22:56,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-20 17:22:56,756 INFO L175 Difference]: Start difference. First operand has 338 places, 417 transitions, 4898 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:22:56,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 444 transitions, 5922 flow [2024-06-20 17:22:58,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 444 transitions, 5707 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:58,369 INFO L231 Difference]: Finished difference. Result has 340 places, 418 transitions, 4804 flow [2024-06-20 17:22:58,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4804, PETRI_PLACES=340, PETRI_TRANSITIONS=418} [2024-06-20 17:22:58,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 17:22:58,369 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 418 transitions, 4804 flow [2024-06-20 17:22:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:58,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:58,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:22:58,370 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:58,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 402180448, now seen corresponding path program 1 times [2024-06-20 17:22:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601031184] [2024-06-20 17:22:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:58,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:01,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:01,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601031184] [2024-06-20 17:23:01,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601031184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:01,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:01,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294973273] [2024-06-20 17:23:01,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:01,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:01,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:01,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 418 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:01,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:01,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:03,817 INFO L124 PetriNetUnfolderBase]: 3073/5047 cut-off events. [2024-06-20 17:23:03,818 INFO L125 PetriNetUnfolderBase]: For 391735/391735 co-relation queries the response was YES. [2024-06-20 17:23:03,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34139 conditions, 5047 events. 3073/5047 cut-off events. For 391735/391735 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 32004 event pairs, 656 based on Foata normal form. 6/5051 useless extension candidates. Maximal degree in co-relation 33982. Up to 3473 conditions per place. [2024-06-20 17:23:03,903 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 124 changer transitions 0/466 dead transitions. [2024-06-20 17:23:03,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 466 transitions, 6392 flow [2024-06-20 17:23:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:23:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:23:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:23:03,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:23:03,905 INFO L175 Difference]: Start difference. First operand has 340 places, 418 transitions, 4804 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:23:03,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 466 transitions, 6392 flow [2024-06-20 17:23:05,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 466 transitions, 6297 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:05,542 INFO L231 Difference]: Finished difference. Result has 342 places, 420 transitions, 5011 flow [2024-06-20 17:23:05,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4709, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5011, PETRI_PLACES=342, PETRI_TRANSITIONS=420} [2024-06-20 17:23:05,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-20 17:23:05,543 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 420 transitions, 5011 flow [2024-06-20 17:23:05,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:05,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:05,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:23:05,543 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:05,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash 402449218, now seen corresponding path program 2 times [2024-06-20 17:23:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365638039] [2024-06-20 17:23:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:08,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:08,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365638039] [2024-06-20 17:23:08,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365638039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:08,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:08,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66829838] [2024-06-20 17:23:08,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:09,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:09,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 420 transitions, 5011 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:09,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:09,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:09,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:10,790 INFO L124 PetriNetUnfolderBase]: 3093/5077 cut-off events. [2024-06-20 17:23:10,791 INFO L125 PetriNetUnfolderBase]: For 401482/401482 co-relation queries the response was YES. [2024-06-20 17:23:10,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34866 conditions, 5077 events. 3093/5077 cut-off events. For 401482/401482 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 32270 event pairs, 633 based on Foata normal form. 6/5081 useless extension candidates. Maximal degree in co-relation 34708. Up to 3485 conditions per place. [2024-06-20 17:23:10,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 124 changer transitions 0/463 dead transitions. [2024-06-20 17:23:10,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 463 transitions, 6383 flow [2024-06-20 17:23:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:23:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:23:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:23:10,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:23:10,852 INFO L175 Difference]: Start difference. First operand has 342 places, 420 transitions, 5011 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:23:10,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 463 transitions, 6383 flow [2024-06-20 17:23:12,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 463 transitions, 6102 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:12,597 INFO L231 Difference]: Finished difference. Result has 345 places, 421 transitions, 5008 flow [2024-06-20 17:23:12,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5008, PETRI_PLACES=345, PETRI_TRANSITIONS=421} [2024-06-20 17:23:12,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-20 17:23:12,598 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 421 transitions, 5008 flow [2024-06-20 17:23:12,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:12,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:12,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:12,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:23:12,598 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:12,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 402449559, now seen corresponding path program 1 times [2024-06-20 17:23:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:12,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519656824] [2024-06-20 17:23:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:15,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519656824] [2024-06-20 17:23:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519656824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:15,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:15,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:15,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370311010] [2024-06-20 17:23:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:15,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:15,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 421 transitions, 5008 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:15,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:15,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:15,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:17,829 INFO L124 PetriNetUnfolderBase]: 3180/5191 cut-off events. [2024-06-20 17:23:17,829 INFO L125 PetriNetUnfolderBase]: For 469100/469100 co-relation queries the response was YES. [2024-06-20 17:23:17,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36584 conditions, 5191 events. 3180/5191 cut-off events. For 469100/469100 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 32940 event pairs, 802 based on Foata normal form. 8/5197 useless extension candidates. Maximal degree in co-relation 36425. Up to 4537 conditions per place. [2024-06-20 17:23:17,888 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 92 changer transitions 0/468 dead transitions. [2024-06-20 17:23:17,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 468 transitions, 6354 flow [2024-06-20 17:23:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:23:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:23:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-20 17:23:17,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-20 17:23:17,889 INFO L175 Difference]: Start difference. First operand has 345 places, 421 transitions, 5008 flow. Second operand 11 states and 186 transitions. [2024-06-20 17:23:17,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 468 transitions, 6354 flow [2024-06-20 17:23:19,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 468 transitions, 6152 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:19,805 INFO L231 Difference]: Finished difference. Result has 350 places, 423 transitions, 5028 flow [2024-06-20 17:23:19,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5028, PETRI_PLACES=350, PETRI_TRANSITIONS=423} [2024-06-20 17:23:19,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 17:23:19,805 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 423 transitions, 5028 flow [2024-06-20 17:23:19,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:19,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:19,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:19,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:23:19,806 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:19,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1178004311, now seen corresponding path program 2 times [2024-06-20 17:23:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:19,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985370909] [2024-06-20 17:23:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:19,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985370909] [2024-06-20 17:23:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985370909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:23,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861013031] [2024-06-20 17:23:23,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:23,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 423 transitions, 5028 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:23,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:23,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:23,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:25,039 INFO L124 PetriNetUnfolderBase]: 3216/5257 cut-off events. [2024-06-20 17:23:25,039 INFO L125 PetriNetUnfolderBase]: For 488106/488106 co-relation queries the response was YES. [2024-06-20 17:23:25,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36903 conditions, 5257 events. 3216/5257 cut-off events. For 488106/488106 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33541 event pairs, 832 based on Foata normal form. 10/5265 useless extension candidates. Maximal degree in co-relation 36743. Up to 4762 conditions per place. [2024-06-20 17:23:25,111 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 85 changer transitions 0/460 dead transitions. [2024-06-20 17:23:25,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 460 transitions, 6102 flow [2024-06-20 17:23:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:23:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:23:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-20 17:23:25,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-20 17:23:25,113 INFO L175 Difference]: Start difference. First operand has 350 places, 423 transitions, 5028 flow. Second operand 11 states and 178 transitions. [2024-06-20 17:23:25,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 460 transitions, 6102 flow [2024-06-20 17:23:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 460 transitions, 5985 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:26,962 INFO L231 Difference]: Finished difference. Result has 354 places, 424 transitions, 5106 flow [2024-06-20 17:23:26,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5106, PETRI_PLACES=354, PETRI_TRANSITIONS=424} [2024-06-20 17:23:26,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 17:23:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 424 transitions, 5106 flow [2024-06-20 17:23:26,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:26,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:26,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:26,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:23:26,963 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:26,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1264692401, now seen corresponding path program 3 times [2024-06-20 17:23:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916108405] [2024-06-20 17:23:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916108405] [2024-06-20 17:23:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916108405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:30,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170957649] [2024-06-20 17:23:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:30,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:30,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 424 transitions, 5106 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:30,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:30,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:30,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:32,531 INFO L124 PetriNetUnfolderBase]: 3244/5299 cut-off events. [2024-06-20 17:23:32,531 INFO L125 PetriNetUnfolderBase]: For 487688/487688 co-relation queries the response was YES. [2024-06-20 17:23:32,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37417 conditions, 5299 events. 3244/5299 cut-off events. For 487688/487688 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33831 event pairs, 828 based on Foata normal form. 8/5305 useless extension candidates. Maximal degree in co-relation 37255. Up to 4768 conditions per place. [2024-06-20 17:23:32,602 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 88 changer transitions 0/466 dead transitions. [2024-06-20 17:23:32,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 466 transitions, 6218 flow [2024-06-20 17:23:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:23:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:23:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-20 17:23:32,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39227642276422764 [2024-06-20 17:23:32,604 INFO L175 Difference]: Start difference. First operand has 354 places, 424 transitions, 5106 flow. Second operand 12 states and 193 transitions. [2024-06-20 17:23:32,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 466 transitions, 6218 flow [2024-06-20 17:23:34,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 466 transitions, 6043 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 17:23:34,483 INFO L231 Difference]: Finished difference. Result has 357 places, 425 transitions, 5133 flow [2024-06-20 17:23:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5133, PETRI_PLACES=357, PETRI_TRANSITIONS=425} [2024-06-20 17:23:34,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 17:23:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 425 transitions, 5133 flow [2024-06-20 17:23:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:23:34,484 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:34,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1178000250, now seen corresponding path program 3 times [2024-06-20 17:23:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482349436] [2024-06-20 17:23:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:37,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:37,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482349436] [2024-06-20 17:23:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482349436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599750779] [2024-06-20 17:23:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:37,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:37,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:37,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 425 transitions, 5133 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:37,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:37,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:37,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:39,829 INFO L124 PetriNetUnfolderBase]: 3264/5356 cut-off events. [2024-06-20 17:23:39,829 INFO L125 PetriNetUnfolderBase]: For 483900/483900 co-relation queries the response was YES. [2024-06-20 17:23:39,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37699 conditions, 5356 events. 3264/5356 cut-off events. For 483900/483900 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 34359 event pairs, 763 based on Foata normal form. 6/5360 useless extension candidates. Maximal degree in co-relation 37536. Up to 4641 conditions per place. [2024-06-20 17:23:39,902 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 111 changer transitions 0/459 dead transitions. [2024-06-20 17:23:39,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 459 transitions, 6220 flow [2024-06-20 17:23:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:23:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:23:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:23:39,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 17:23:39,903 INFO L175 Difference]: Start difference. First operand has 357 places, 425 transitions, 5133 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:23:39,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 459 transitions, 6220 flow [2024-06-20 17:23:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 459 transitions, 6032 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 17:23:42,113 INFO L231 Difference]: Finished difference. Result has 356 places, 426 transitions, 5190 flow [2024-06-20 17:23:42,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4945, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5190, PETRI_PLACES=356, PETRI_TRANSITIONS=426} [2024-06-20 17:23:42,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 17:23:42,113 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 426 transitions, 5190 flow [2024-06-20 17:23:42,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:42,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:42,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:42,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:23:42,114 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:42,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1583046893, now seen corresponding path program 4 times [2024-06-20 17:23:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452439427] [2024-06-20 17:23:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:42,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:45,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452439427] [2024-06-20 17:23:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452439427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:45,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:45,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:45,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833389066] [2024-06-20 17:23:45,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:45,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:45,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:45,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:45,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:45,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 426 transitions, 5190 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:45,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:47,700 INFO L124 PetriNetUnfolderBase]: 3404/5578 cut-off events. [2024-06-20 17:23:47,700 INFO L125 PetriNetUnfolderBase]: For 704005/704005 co-relation queries the response was YES. [2024-06-20 17:23:47,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39022 conditions, 5578 events. 3404/5578 cut-off events. For 704005/704005 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35929 event pairs, 810 based on Foata normal form. 44/5621 useless extension candidates. Maximal degree in co-relation 38858. Up to 4871 conditions per place. [2024-06-20 17:23:47,779 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 67 changer transitions 11/463 dead transitions. [2024-06-20 17:23:47,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 463 transitions, 6284 flow [2024-06-20 17:23:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:23:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:23:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-20 17:23:47,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:23:47,780 INFO L175 Difference]: Start difference. First operand has 356 places, 426 transitions, 5190 flow. Second operand 12 states and 192 transitions. [2024-06-20 17:23:47,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 463 transitions, 6284 flow [2024-06-20 17:23:49,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 463 transitions, 6060 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:49,935 INFO L231 Difference]: Finished difference. Result has 361 places, 418 transitions, 5032 flow [2024-06-20 17:23:49,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4966, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5032, PETRI_PLACES=361, PETRI_TRANSITIONS=418} [2024-06-20 17:23:49,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:23:49,935 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 418 transitions, 5032 flow [2024-06-20 17:23:49,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:49,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:23:49,936 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:49,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1383600953, now seen corresponding path program 5 times [2024-06-20 17:23:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376362418] [2024-06-20 17:23:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:53,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:53,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376362418] [2024-06-20 17:23:53,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376362418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:53,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:53,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:53,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596270661] [2024-06-20 17:23:53,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:53,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:53,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:53,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:23:53,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 418 transitions, 5032 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:53,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:53,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:23:53,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:55,524 INFO L124 PetriNetUnfolderBase]: 3408/5586 cut-off events. [2024-06-20 17:23:55,525 INFO L125 PetriNetUnfolderBase]: For 717991/717991 co-relation queries the response was YES. [2024-06-20 17:23:55,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39123 conditions, 5586 events. 3408/5586 cut-off events. For 717991/717991 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 36025 event pairs, 818 based on Foata normal form. 44/5629 useless extension candidates. Maximal degree in co-relation 38958. Up to 4917 conditions per place. [2024-06-20 17:23:55,601 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 62 changer transitions 7/454 dead transitions. [2024-06-20 17:23:55,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 454 transitions, 6108 flow [2024-06-20 17:23:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:23:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:23:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-20 17:23:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-20 17:23:55,602 INFO L175 Difference]: Start difference. First operand has 361 places, 418 transitions, 5032 flow. Second operand 11 states and 180 transitions. [2024-06-20 17:23:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 454 transitions, 6108 flow [2024-06-20 17:23:57,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 454 transitions, 5953 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 17:23:57,633 INFO L231 Difference]: Finished difference. Result has 361 places, 414 transitions, 4974 flow [2024-06-20 17:23:57,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4974, PETRI_PLACES=361, PETRI_TRANSITIONS=414} [2024-06-20 17:23:57,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:23:57,633 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 414 transitions, 4974 flow [2024-06-20 17:23:57,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:57,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:57,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:23:57,634 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:57,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash 274330302, now seen corresponding path program 4 times [2024-06-20 17:23:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:57,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167503249] [2024-06-20 17:23:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:01,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167503249] [2024-06-20 17:24:01,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167503249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:01,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:01,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372692588] [2024-06-20 17:24:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:01,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:01,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:01,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 414 transitions, 4974 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:01,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:01,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:01,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:03,015 INFO L124 PetriNetUnfolderBase]: 3310/5444 cut-off events. [2024-06-20 17:24:03,015 INFO L125 PetriNetUnfolderBase]: For 503239/503239 co-relation queries the response was YES. [2024-06-20 17:24:03,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38247 conditions, 5444 events. 3310/5444 cut-off events. For 503239/503239 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 35173 event pairs, 800 based on Foata normal form. 6/5449 useless extension candidates. Maximal degree in co-relation 38082. Up to 4924 conditions per place. [2024-06-20 17:24:03,084 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 392 selfloop transitions, 47 changer transitions 0/444 dead transitions. [2024-06-20 17:24:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 444 transitions, 6017 flow [2024-06-20 17:24:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:24:03,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:24:03,086 INFO L175 Difference]: Start difference. First operand has 361 places, 414 transitions, 4974 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:24:03,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 444 transitions, 6017 flow [2024-06-20 17:24:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 444 transitions, 5882 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:24:04,953 INFO L231 Difference]: Finished difference. Result has 361 places, 415 transitions, 4958 flow [2024-06-20 17:24:04,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4839, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4958, PETRI_PLACES=361, PETRI_TRANSITIONS=415} [2024-06-20 17:24:04,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:24:04,954 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 415 transitions, 4958 flow [2024-06-20 17:24:04,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:04,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:04,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:04,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:24:04,954 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:04,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 609920151, now seen corresponding path program 6 times [2024-06-20 17:24:04,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:04,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780035944] [2024-06-20 17:24:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:08,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:08,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780035944] [2024-06-20 17:24:08,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780035944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:08,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:08,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41570483] [2024-06-20 17:24:08,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:08,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:08,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:08,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 415 transitions, 4958 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:08,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:08,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:08,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:10,436 INFO L124 PetriNetUnfolderBase]: 3434/5634 cut-off events. [2024-06-20 17:24:10,436 INFO L125 PetriNetUnfolderBase]: For 706349/706349 co-relation queries the response was YES. [2024-06-20 17:24:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39264 conditions, 5634 events. 3434/5634 cut-off events. For 706349/706349 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 36350 event pairs, 780 based on Foata normal form. 40/5673 useless extension candidates. Maximal degree in co-relation 39098. Up to 4817 conditions per place. [2024-06-20 17:24:10,516 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 58 changer transitions 14/457 dead transitions. [2024-06-20 17:24:10,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 457 transitions, 6110 flow [2024-06-20 17:24:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:24:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:24:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-20 17:24:10,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-20 17:24:10,517 INFO L175 Difference]: Start difference. First operand has 361 places, 415 transitions, 4958 flow. Second operand 11 states and 184 transitions. [2024-06-20 17:24:10,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 457 transitions, 6110 flow [2024-06-20 17:24:13,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 457 transitions, 6012 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:13,010 INFO L231 Difference]: Finished difference. Result has 365 places, 407 transitions, 4843 flow [2024-06-20 17:24:13,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4843, PETRI_PLACES=365, PETRI_TRANSITIONS=407} [2024-06-20 17:24:13,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-20 17:24:13,011 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 407 transitions, 4843 flow [2024-06-20 17:24:13,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:13,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:13,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:13,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:24:13,011 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:13,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1590671405, now seen corresponding path program 1 times [2024-06-20 17:24:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306110904] [2024-06-20 17:24:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:16,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306110904] [2024-06-20 17:24:16,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306110904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:16,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:16,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:16,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316840425] [2024-06-20 17:24:16,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:16,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:16,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:16,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:16,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:16,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 407 transitions, 4843 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:16,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:16,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:16,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:18,902 INFO L124 PetriNetUnfolderBase]: 3378/5566 cut-off events. [2024-06-20 17:24:18,902 INFO L125 PetriNetUnfolderBase]: For 691019/691019 co-relation queries the response was YES. [2024-06-20 17:24:18,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38825 conditions, 5566 events. 3378/5566 cut-off events. For 691019/691019 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 35902 event pairs, 774 based on Foata normal form. 36/5601 useless extension candidates. Maximal degree in co-relation 38658. Up to 4727 conditions per place. [2024-06-20 17:24:18,980 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 50 changer transitions 18/452 dead transitions. [2024-06-20 17:24:18,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 452 transitions, 6013 flow [2024-06-20 17:24:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:24:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:24:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-20 17:24:18,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-20 17:24:18,981 INFO L175 Difference]: Start difference. First operand has 365 places, 407 transitions, 4843 flow. Second operand 12 states and 194 transitions. [2024-06-20 17:24:18,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 452 transitions, 6013 flow [2024-06-20 17:24:21,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 452 transitions, 5859 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 17:24:21,236 INFO L231 Difference]: Finished difference. Result has 369 places, 398 transitions, 4642 flow [2024-06-20 17:24:21,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4642, PETRI_PLACES=369, PETRI_TRANSITIONS=398} [2024-06-20 17:24:21,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-20 17:24:21,237 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 398 transitions, 4642 flow [2024-06-20 17:24:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:21,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:21,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:21,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:24:21,237 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:21,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1906126348, now seen corresponding path program 10 times [2024-06-20 17:24:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:21,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953536884] [2024-06-20 17:24:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:21,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953536884] [2024-06-20 17:24:24,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953536884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:24,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936661384] [2024-06-20 17:24:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:24,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:24,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 398 transitions, 4642 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:24,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:24,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:24,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:26,646 INFO L124 PetriNetUnfolderBase]: 3251/5350 cut-off events. [2024-06-20 17:24:26,646 INFO L125 PetriNetUnfolderBase]: For 576534/576534 co-relation queries the response was YES. [2024-06-20 17:24:26,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38384 conditions, 5350 events. 3251/5350 cut-off events. For 576534/576534 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 34291 event pairs, 782 based on Foata normal form. 8/5356 useless extension candidates. Maximal degree in co-relation 38215. Up to 4590 conditions per place. [2024-06-20 17:24:26,718 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 95 changer transitions 0/440 dead transitions. [2024-06-20 17:24:26,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 440 transitions, 5990 flow [2024-06-20 17:24:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:24:26,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 17:24:26,719 INFO L175 Difference]: Start difference. First operand has 369 places, 398 transitions, 4642 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:24:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 440 transitions, 5990 flow [2024-06-20 17:24:29,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 440 transitions, 5903 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 17:24:29,129 INFO L231 Difference]: Finished difference. Result has 368 places, 400 transitions, 4799 flow [2024-06-20 17:24:29,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4555, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4799, PETRI_PLACES=368, PETRI_TRANSITIONS=400} [2024-06-20 17:24:29,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 17:24:29,129 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 400 transitions, 4799 flow [2024-06-20 17:24:29,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:29,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:29,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:24:29,130 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1803345570, now seen corresponding path program 11 times [2024-06-20 17:24:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:29,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827473696] [2024-06-20 17:24:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827473696] [2024-06-20 17:24:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827473696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:32,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:32,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343658820] [2024-06-20 17:24:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:32,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:32,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:32,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 400 transitions, 4799 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:32,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:32,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:34,833 INFO L124 PetriNetUnfolderBase]: 3279/5394 cut-off events. [2024-06-20 17:24:34,834 INFO L125 PetriNetUnfolderBase]: For 588260/588260 co-relation queries the response was YES. [2024-06-20 17:24:34,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39032 conditions, 5394 events. 3279/5394 cut-off events. For 588260/588260 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34681 event pairs, 802 based on Foata normal form. 8/5400 useless extension candidates. Maximal degree in co-relation 38861. Up to 4820 conditions per place. [2024-06-20 17:24:34,899 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 333 selfloop transitions, 94 changer transitions 0/432 dead transitions. [2024-06-20 17:24:34,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 432 transitions, 5823 flow [2024-06-20 17:24:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:24:34,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 17:24:34,901 INFO L175 Difference]: Start difference. First operand has 368 places, 400 transitions, 4799 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:24:34,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 432 transitions, 5823 flow [2024-06-20 17:24:37,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 432 transitions, 5691 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:37,194 INFO L231 Difference]: Finished difference. Result has 372 places, 401 transitions, 4888 flow [2024-06-20 17:24:37,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4673, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4888, PETRI_PLACES=372, PETRI_TRANSITIONS=401} [2024-06-20 17:24:37,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 17:24:37,195 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 401 transitions, 4888 flow [2024-06-20 17:24:37,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:37,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:37,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:37,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:24:37,195 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:37,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -706096592, now seen corresponding path program 12 times [2024-06-20 17:24:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:37,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721259869] [2024-06-20 17:24:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:37,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:40,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721259869] [2024-06-20 17:24:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721259869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:40,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:40,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315610434] [2024-06-20 17:24:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:40,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:40,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 401 transitions, 4888 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:40,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:40,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:40,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:42,550 INFO L124 PetriNetUnfolderBase]: 3307/5438 cut-off events. [2024-06-20 17:24:42,550 INFO L125 PetriNetUnfolderBase]: For 597790/597790 co-relation queries the response was YES. [2024-06-20 17:24:42,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39518 conditions, 5438 events. 3307/5438 cut-off events. For 597790/597790 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 35009 event pairs, 806 based on Foata normal form. 8/5444 useless extension candidates. Maximal degree in co-relation 39345. Up to 4864 conditions per place. [2024-06-20 17:24:42,628 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 333 selfloop transitions, 92 changer transitions 0/430 dead transitions. [2024-06-20 17:24:42,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 430 transitions, 5896 flow [2024-06-20 17:24:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:24:42,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-20 17:24:42,629 INFO L175 Difference]: Start difference. First operand has 372 places, 401 transitions, 4888 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:24:42,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 430 transitions, 5896 flow [2024-06-20 17:24:44,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 430 transitions, 5707 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:44,900 INFO L231 Difference]: Finished difference. Result has 374 places, 402 transitions, 4912 flow [2024-06-20 17:24:44,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4912, PETRI_PLACES=374, PETRI_TRANSITIONS=402} [2024-06-20 17:24:44,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 17:24:44,901 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 402 transitions, 4912 flow [2024-06-20 17:24:44,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:44,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:44,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:44,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:24:44,901 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:44,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1293513408, now seen corresponding path program 13 times [2024-06-20 17:24:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:44,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765079685] [2024-06-20 17:24:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:44,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:47,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:47,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765079685] [2024-06-20 17:24:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765079685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:47,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6223405] [2024-06-20 17:24:47,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:47,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:47,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:47,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:47,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:48,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:48,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 402 transitions, 4912 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:50,222 INFO L124 PetriNetUnfolderBase]: 3335/5482 cut-off events. [2024-06-20 17:24:50,222 INFO L125 PetriNetUnfolderBase]: For 608977/608977 co-relation queries the response was YES. [2024-06-20 17:24:50,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39951 conditions, 5482 events. 3335/5482 cut-off events. For 608977/608977 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35358 event pairs, 810 based on Foata normal form. 8/5488 useless extension candidates. Maximal degree in co-relation 39777. Up to 4908 conditions per place. [2024-06-20 17:24:50,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 96 changer transitions 0/426 dead transitions. [2024-06-20 17:24:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 426 transitions, 5892 flow [2024-06-20 17:24:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:24:50,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:24:50,302 INFO L175 Difference]: Start difference. First operand has 374 places, 402 transitions, 4912 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:24:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 426 transitions, 5892 flow [2024-06-20 17:24:52,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 426 transitions, 5705 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:52,404 INFO L231 Difference]: Finished difference. Result has 376 places, 403 transitions, 4948 flow [2024-06-20 17:24:52,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4948, PETRI_PLACES=376, PETRI_TRANSITIONS=403} [2024-06-20 17:24:52,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 17:24:52,404 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 403 transitions, 4948 flow [2024-06-20 17:24:52,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:52,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:52,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:52,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:24:52,405 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:52,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1364741794, now seen corresponding path program 14 times [2024-06-20 17:24:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283697849] [2024-06-20 17:24:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283697849] [2024-06-20 17:24:55,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283697849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:55,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:55,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663417199] [2024-06-20 17:24:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:55,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:55,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:55,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:24:55,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 403 transitions, 4948 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:55,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:55,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:24:55,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:58,144 INFO L124 PetriNetUnfolderBase]: 3317/5455 cut-off events. [2024-06-20 17:24:58,145 INFO L125 PetriNetUnfolderBase]: For 568575/568575 co-relation queries the response was YES. [2024-06-20 17:24:58,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38941 conditions, 5455 events. 3317/5455 cut-off events. For 568575/568575 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35220 event pairs, 793 based on Foata normal form. 8/5462 useless extension candidates. Maximal degree in co-relation 38766. Up to 4777 conditions per place. [2024-06-20 17:24:58,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 76 changer transitions 0/451 dead transitions. [2024-06-20 17:24:58,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 451 transitions, 6050 flow [2024-06-20 17:24:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:24:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:24:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 17:24:58,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-20 17:24:58,230 INFO L175 Difference]: Start difference. First operand has 376 places, 403 transitions, 4948 flow. Second operand 10 states and 182 transitions. [2024-06-20 17:24:58,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 451 transitions, 6050 flow [2024-06-20 17:25:00,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 451 transitions, 5849 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:00,428 INFO L231 Difference]: Finished difference. Result has 379 places, 403 transitions, 4910 flow [2024-06-20 17:25:00,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4910, PETRI_PLACES=379, PETRI_TRANSITIONS=403} [2024-06-20 17:25:00,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-20 17:25:00,429 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 403 transitions, 4910 flow [2024-06-20 17:25:00,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:00,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:00,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:00,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:25:00,429 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:00,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1354924382, now seen corresponding path program 15 times [2024-06-20 17:25:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933035788] [2024-06-20 17:25:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:03,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:03,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933035788] [2024-06-20 17:25:03,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933035788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:03,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:03,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:03,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25306280] [2024-06-20 17:25:03,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:03,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:03,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:03,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 403 transitions, 4910 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:03,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:03,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:05,595 INFO L124 PetriNetUnfolderBase]: 3299/5430 cut-off events. [2024-06-20 17:25:05,595 INFO L125 PetriNetUnfolderBase]: For 525914/525914 co-relation queries the response was YES. [2024-06-20 17:25:05,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37881 conditions, 5430 events. 3299/5430 cut-off events. For 525914/525914 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35056 event pairs, 782 based on Foata normal form. 8/5436 useless extension candidates. Maximal degree in co-relation 37705. Up to 4783 conditions per place. [2024-06-20 17:25:05,674 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 71 changer transitions 0/437 dead transitions. [2024-06-20 17:25:05,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 437 transitions, 5932 flow [2024-06-20 17:25:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:25:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:25:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:25:05,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:25:05,675 INFO L175 Difference]: Start difference. First operand has 379 places, 403 transitions, 4910 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:25:05,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 437 transitions, 5932 flow [2024-06-20 17:25:07,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 437 transitions, 5759 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 17:25:07,678 INFO L231 Difference]: Finished difference. Result has 377 places, 403 transitions, 4887 flow [2024-06-20 17:25:07,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4887, PETRI_PLACES=377, PETRI_TRANSITIONS=403} [2024-06-20 17:25:07,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 17:25:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 403 transitions, 4887 flow [2024-06-20 17:25:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:07,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:07,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:07,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:25:07,679 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1025513368, now seen corresponding path program 5 times [2024-06-20 17:25:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306298971] [2024-06-20 17:25:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:10,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:10,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306298971] [2024-06-20 17:25:10,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306298971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:10,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:10,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398424982] [2024-06-20 17:25:10,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:10,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:10,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:10,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:10,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 403 transitions, 4887 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:10,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:10,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:10,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:12,829 INFO L124 PetriNetUnfolderBase]: 3352/5517 cut-off events. [2024-06-20 17:25:12,829 INFO L125 PetriNetUnfolderBase]: For 542318/542318 co-relation queries the response was YES. [2024-06-20 17:25:12,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39021 conditions, 5517 events. 3352/5517 cut-off events. For 542318/542318 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35609 event pairs, 778 based on Foata normal form. 6/5521 useless extension candidates. Maximal degree in co-relation 38845. Up to 4470 conditions per place. [2024-06-20 17:25:12,899 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 339 selfloop transitions, 104 changer transitions 0/448 dead transitions. [2024-06-20 17:25:12,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 448 transitions, 6269 flow [2024-06-20 17:25:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:25:12,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:25:12,901 INFO L175 Difference]: Start difference. First operand has 377 places, 403 transitions, 4887 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:25:12,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 448 transitions, 6269 flow [2024-06-20 17:25:15,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 448 transitions, 6105 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:15,106 INFO L231 Difference]: Finished difference. Result has 378 places, 405 transitions, 4991 flow [2024-06-20 17:25:15,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4991, PETRI_PLACES=378, PETRI_TRANSITIONS=405} [2024-06-20 17:25:15,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 17:25:15,106 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 405 transitions, 4991 flow [2024-06-20 17:25:15,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:15,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:15,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:15,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:25:15,107 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:15,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1025244257, now seen corresponding path program 7 times [2024-06-20 17:25:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:15,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397971651] [2024-06-20 17:25:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:15,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:18,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:18,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397971651] [2024-06-20 17:25:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397971651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:18,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:18,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027397955] [2024-06-20 17:25:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:18,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:18,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:18,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 405 transitions, 4991 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:18,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:18,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:18,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:20,206 INFO L124 PetriNetUnfolderBase]: 3439/5638 cut-off events. [2024-06-20 17:25:20,206 INFO L125 PetriNetUnfolderBase]: For 622617/622623 co-relation queries the response was YES. [2024-06-20 17:25:20,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41077 conditions, 5638 events. 3439/5638 cut-off events. For 622617/622623 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36506 event pairs, 922 based on Foata normal form. 14/5651 useless extension candidates. Maximal degree in co-relation 40901. Up to 5050 conditions per place. [2024-06-20 17:25:20,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 69 changer transitions 0/447 dead transitions. [2024-06-20 17:25:20,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 447 transitions, 6313 flow [2024-06-20 17:25:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:25:20,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-20 17:25:20,293 INFO L175 Difference]: Start difference. First operand has 378 places, 405 transitions, 4991 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:25:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 447 transitions, 6313 flow [2024-06-20 17:25:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 447 transitions, 6085 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:22,618 INFO L231 Difference]: Finished difference. Result has 382 places, 407 transitions, 4947 flow [2024-06-20 17:25:22,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4947, PETRI_PLACES=382, PETRI_TRANSITIONS=407} [2024-06-20 17:25:22,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 17:25:22,619 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 407 transitions, 4947 flow [2024-06-20 17:25:22,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:22,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:22,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:25:22,620 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:22,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1633438910, now seen corresponding path program 6 times [2024-06-20 17:25:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31258988] [2024-06-20 17:25:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:25,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:25,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31258988] [2024-06-20 17:25:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31258988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:25,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:25,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314521676] [2024-06-20 17:25:25,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:25,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:25,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:25,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:25,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 407 transitions, 4947 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:25,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:25,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:25,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:27,780 INFO L124 PetriNetUnfolderBase]: 3459/5680 cut-off events. [2024-06-20 17:25:27,781 INFO L125 PetriNetUnfolderBase]: For 616848/616848 co-relation queries the response was YES. [2024-06-20 17:25:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41110 conditions, 5680 events. 3459/5680 cut-off events. For 616848/616848 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36739 event pairs, 812 based on Foata normal form. 6/5684 useless extension candidates. Maximal degree in co-relation 40933. Up to 4615 conditions per place. [2024-06-20 17:25:27,860 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 103 changer transitions 0/448 dead transitions. [2024-06-20 17:25:27,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 448 transitions, 6305 flow [2024-06-20 17:25:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:25:27,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 17:25:27,862 INFO L175 Difference]: Start difference. First operand has 382 places, 407 transitions, 4947 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:25:27,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 448 transitions, 6305 flow [2024-06-20 17:25:29,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 448 transitions, 6209 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:29,905 INFO L231 Difference]: Finished difference. Result has 385 places, 408 transitions, 5077 flow [2024-06-20 17:25:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5077, PETRI_PLACES=385, PETRI_TRANSITIONS=408} [2024-06-20 17:25:29,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-20 17:25:29,906 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 408 transitions, 5077 flow [2024-06-20 17:25:29,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:29,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:29,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:25:29,906 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:29,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1530110223, now seen corresponding path program 8 times [2024-06-20 17:25:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093174247] [2024-06-20 17:25:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:33,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093174247] [2024-06-20 17:25:33,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093174247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:33,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:33,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:33,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857268598] [2024-06-20 17:25:33,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:33,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:33,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:33,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:33,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 408 transitions, 5077 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:33,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:33,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:33,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:35,616 INFO L124 PetriNetUnfolderBase]: 3546/5813 cut-off events. [2024-06-20 17:25:35,616 INFO L125 PetriNetUnfolderBase]: For 709100/709106 co-relation queries the response was YES. [2024-06-20 17:25:35,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43334 conditions, 5813 events. 3546/5813 cut-off events. For 709100/709106 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37802 event pairs, 957 based on Foata normal form. 14/5826 useless extension candidates. Maximal degree in co-relation 43155. Up to 5285 conditions per place. [2024-06-20 17:25:35,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 66 changer transitions 0/447 dead transitions. [2024-06-20 17:25:35,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 447 transitions, 6385 flow [2024-06-20 17:25:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:25:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:25:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 17:25:35,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:25:35,690 INFO L175 Difference]: Start difference. First operand has 385 places, 408 transitions, 5077 flow. Second operand 11 states and 176 transitions. [2024-06-20 17:25:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 447 transitions, 6385 flow [2024-06-20 17:25:38,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 447 transitions, 6203 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:38,386 INFO L231 Difference]: Finished difference. Result has 390 places, 410 transitions, 5069 flow [2024-06-20 17:25:38,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5069, PETRI_PLACES=390, PETRI_TRANSITIONS=410} [2024-06-20 17:25:38,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 17:25:38,387 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 410 transitions, 5069 flow [2024-06-20 17:25:38,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:38,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:38,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:25:38,387 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:38,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash -792603952, now seen corresponding path program 7 times [2024-06-20 17:25:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989909984] [2024-06-20 17:25:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:41,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:41,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989909984] [2024-06-20 17:25:41,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989909984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:41,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:41,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:41,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402938727] [2024-06-20 17:25:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:41,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:41,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 410 transitions, 5069 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:41,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:41,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:41,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:43,687 INFO L124 PetriNetUnfolderBase]: 3566/5855 cut-off events. [2024-06-20 17:25:43,687 INFO L125 PetriNetUnfolderBase]: For 705678/705678 co-relation queries the response was YES. [2024-06-20 17:25:43,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43509 conditions, 5855 events. 3566/5855 cut-off events. For 705678/705678 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38093 event pairs, 879 based on Foata normal form. 6/5859 useless extension candidates. Maximal degree in co-relation 43329. Up to 5207 conditions per place. [2024-06-20 17:25:43,780 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 342 selfloop transitions, 95 changer transitions 0/442 dead transitions. [2024-06-20 17:25:43,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 442 transitions, 6120 flow [2024-06-20 17:25:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:25:43,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 17:25:43,782 INFO L175 Difference]: Start difference. First operand has 390 places, 410 transitions, 5069 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:25:43,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 442 transitions, 6120 flow [2024-06-20 17:25:46,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 442 transitions, 6031 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:47,001 INFO L231 Difference]: Finished difference. Result has 392 places, 411 transitions, 5193 flow [2024-06-20 17:25:47,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5193, PETRI_PLACES=392, PETRI_TRANSITIONS=411} [2024-06-20 17:25:47,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-20 17:25:47,001 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 411 transitions, 5193 flow [2024-06-20 17:25:47,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:47,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:47,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:47,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:25:47,002 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:47,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:47,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1544724939, now seen corresponding path program 9 times [2024-06-20 17:25:47,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:47,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960183283] [2024-06-20 17:25:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:47,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:50,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:50,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960183283] [2024-06-20 17:25:50,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960183283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:50,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:50,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:50,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249993121] [2024-06-20 17:25:50,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:50,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:50,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:50,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:50,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 411 transitions, 5193 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:50,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:50,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:50,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:52,387 INFO L124 PetriNetUnfolderBase]: 3543/5818 cut-off events. [2024-06-20 17:25:52,387 INFO L125 PetriNetUnfolderBase]: For 677406/677412 co-relation queries the response was YES. [2024-06-20 17:25:52,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42443 conditions, 5818 events. 3543/5818 cut-off events. For 677406/677412 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37959 event pairs, 964 based on Foata normal form. 16/5833 useless extension candidates. Maximal degree in co-relation 42261. Up to 5345 conditions per place. [2024-06-20 17:25:52,473 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 63 changer transitions 0/442 dead transitions. [2024-06-20 17:25:52,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 442 transitions, 6199 flow [2024-06-20 17:25:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 17:25:52,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:25:52,474 INFO L175 Difference]: Start difference. First operand has 392 places, 411 transitions, 5193 flow. Second operand 10 states and 160 transitions. [2024-06-20 17:25:52,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 442 transitions, 6199 flow [2024-06-20 17:25:55,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 442 transitions, 6001 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:55,306 INFO L231 Difference]: Finished difference. Result has 395 places, 411 transitions, 5126 flow [2024-06-20 17:25:55,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5126, PETRI_PLACES=395, PETRI_TRANSITIONS=411} [2024-06-20 17:25:55,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 17:25:55,306 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 411 transitions, 5126 flow [2024-06-20 17:25:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:55,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:55,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:55,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:25:55,307 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1992773358, now seen corresponding path program 8 times [2024-06-20 17:25:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:55,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068928932] [2024-06-20 17:25:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:58,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:58,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068928932] [2024-06-20 17:25:58,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068928932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:58,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:58,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277161157] [2024-06-20 17:25:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:58,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:58,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:25:58,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 411 transitions, 5126 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:58,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:58,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:25:58,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:00,633 INFO L124 PetriNetUnfolderBase]: 3563/5858 cut-off events. [2024-06-20 17:26:00,634 INFO L125 PetriNetUnfolderBase]: For 658536/658536 co-relation queries the response was YES. [2024-06-20 17:26:00,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42618 conditions, 5858 events. 3563/5858 cut-off events. For 658536/658536 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 37905 event pairs, 723 based on Foata normal form. 6/5862 useless extension candidates. Maximal degree in co-relation 42435. Up to 3485 conditions per place. [2024-06-20 17:26:00,721 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 135 changer transitions 0/456 dead transitions. [2024-06-20 17:26:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 456 transitions, 6742 flow [2024-06-20 17:26:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:26:00,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:26:00,722 INFO L175 Difference]: Start difference. First operand has 395 places, 411 transitions, 5126 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:26:00,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 456 transitions, 6742 flow [2024-06-20 17:26:03,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 456 transitions, 6611 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 17:26:03,866 INFO L231 Difference]: Finished difference. Result has 395 places, 412 transitions, 5295 flow [2024-06-20 17:26:03,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5295, PETRI_PLACES=395, PETRI_TRANSITIONS=412} [2024-06-20 17:26:03,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 17:26:03,866 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 412 transitions, 5295 flow [2024-06-20 17:26:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:03,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:03,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:26:03,867 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:03,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1992782658, now seen corresponding path program 9 times [2024-06-20 17:26:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:03,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659861436] [2024-06-20 17:26:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:06,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659861436] [2024-06-20 17:26:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659861436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:06,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120883386] [2024-06-20 17:26:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:07,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:26:07,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 412 transitions, 5295 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:07,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:07,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:26:07,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:09,218 INFO L124 PetriNetUnfolderBase]: 3583/5894 cut-off events. [2024-06-20 17:26:09,218 INFO L125 PetriNetUnfolderBase]: For 672600/672600 co-relation queries the response was YES. [2024-06-20 17:26:09,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43497 conditions, 5894 events. 3583/5894 cut-off events. For 672600/672600 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38241 event pairs, 723 based on Foata normal form. 6/5898 useless extension candidates. Maximal degree in co-relation 43313. Up to 3497 conditions per place. [2024-06-20 17:26:09,307 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 133 changer transitions 0/455 dead transitions. [2024-06-20 17:26:09,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 455 transitions, 6921 flow [2024-06-20 17:26:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:26:09,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:26:09,308 INFO L175 Difference]: Start difference. First operand has 395 places, 412 transitions, 5295 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:26:09,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 455 transitions, 6921 flow [2024-06-20 17:26:12,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 455 transitions, 6449 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 17:26:12,861 INFO L231 Difference]: Finished difference. Result has 395 places, 413 transitions, 5121 flow [2024-06-20 17:26:12,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4836, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5121, PETRI_PLACES=395, PETRI_TRANSITIONS=413} [2024-06-20 17:26:12,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 17:26:12,862 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 413 transitions, 5121 flow [2024-06-20 17:26:12,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:12,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:12,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:12,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:26:12,862 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:12,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1992782999, now seen corresponding path program 10 times [2024-06-20 17:26:12,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:12,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926324320] [2024-06-20 17:26:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:16,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:16,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926324320] [2024-06-20 17:26:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926324320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:16,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:16,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:16,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30375957] [2024-06-20 17:26:16,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:16,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:16,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:26:16,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 413 transitions, 5121 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:16,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:16,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:26:16,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:18,275 INFO L124 PetriNetUnfolderBase]: 3657/6010 cut-off events. [2024-06-20 17:26:18,275 INFO L125 PetriNetUnfolderBase]: For 754489/754495 co-relation queries the response was YES. [2024-06-20 17:26:18,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44093 conditions, 6010 events. 3657/6010 cut-off events. For 754489/754495 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39216 event pairs, 765 based on Foata normal form. 14/6023 useless extension candidates. Maximal degree in co-relation 43911. Up to 5261 conditions per place. [2024-06-20 17:26:18,364 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 86 changer transitions 0/455 dead transitions. [2024-06-20 17:26:18,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 455 transitions, 6455 flow [2024-06-20 17:26:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:26:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:26:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 17:26:18,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-20 17:26:18,365 INFO L175 Difference]: Start difference. First operand has 395 places, 413 transitions, 5121 flow. Second operand 10 states and 166 transitions. [2024-06-20 17:26:18,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 455 transitions, 6455 flow [2024-06-20 17:26:21,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 455 transitions, 6197 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:21,346 INFO L231 Difference]: Finished difference. Result has 399 places, 415 transitions, 5085 flow [2024-06-20 17:26:21,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4863, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5085, PETRI_PLACES=399, PETRI_TRANSITIONS=415} [2024-06-20 17:26:21,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-20 17:26:21,347 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 415 transitions, 5085 flow [2024-06-20 17:26:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:21,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:21,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:21,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:26:21,347 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:21,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1149780784, now seen corresponding path program 10 times [2024-06-20 17:26:21,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:21,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897689001] [2024-06-20 17:26:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:21,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:24,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897689001] [2024-06-20 17:26:24,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897689001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:24,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151021999] [2024-06-20 17:26:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:24,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:24,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:26:24,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 415 transitions, 5085 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:24,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:24,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:26:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:26,715 INFO L124 PetriNetUnfolderBase]: 3677/6044 cut-off events. [2024-06-20 17:26:26,716 INFO L125 PetriNetUnfolderBase]: For 749624/749624 co-relation queries the response was YES. [2024-06-20 17:26:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44042 conditions, 6044 events. 3677/6044 cut-off events. For 749624/749624 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39250 event pairs, 670 based on Foata normal form. 6/6048 useless extension candidates. Maximal degree in co-relation 43859. Up to 3623 conditions per place. [2024-06-20 17:26:26,792 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 307 selfloop transitions, 140 changer transitions 0/452 dead transitions. [2024-06-20 17:26:26,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 452 transitions, 6445 flow [2024-06-20 17:26:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:26:26,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 17:26:26,793 INFO L175 Difference]: Start difference. First operand has 399 places, 415 transitions, 5085 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:26:26,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 452 transitions, 6445 flow [2024-06-20 17:26:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 452 transitions, 6305 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:29,899 INFO L231 Difference]: Finished difference. Result has 402 places, 416 transitions, 5245 flow [2024-06-20 17:26:29,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4945, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5245, PETRI_PLACES=402, PETRI_TRANSITIONS=416} [2024-06-20 17:26:29,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-20 17:26:29,900 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 416 transitions, 5245 flow [2024-06-20 17:26:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:29,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:29,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:26:29,900 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:29,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 314626475, now seen corresponding path program 11 times [2024-06-20 17:26:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006748235] [2024-06-20 17:26:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:32,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006748235] [2024-06-20 17:26:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006748235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:32,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138075961] [2024-06-20 17:26:32,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:32,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:32,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:26:32,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 416 transitions, 5245 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:32,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:32,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:26:32,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:34,908 INFO L124 PetriNetUnfolderBase]: 3784/6217 cut-off events. [2024-06-20 17:26:34,908 INFO L125 PetriNetUnfolderBase]: For 882329/882335 co-relation queries the response was YES. [2024-06-20 17:26:34,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47292 conditions, 6217 events. 3784/6217 cut-off events. For 882329/882335 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40866 event pairs, 766 based on Foata normal form. 14/6230 useless extension candidates. Maximal degree in co-relation 47107. Up to 4359 conditions per place. [2024-06-20 17:26:35,010 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 323 selfloop transitions, 132 changer transitions 0/460 dead transitions. [2024-06-20 17:26:35,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 460 transitions, 6885 flow [2024-06-20 17:26:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:26:35,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 17:26:35,012 INFO L175 Difference]: Start difference. First operand has 402 places, 416 transitions, 5245 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:26:35,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 460 transitions, 6885 flow [2024-06-20 17:26:38,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 460 transitions, 6685 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:38,932 INFO L231 Difference]: Finished difference. Result has 405 places, 419 transitions, 5375 flow [2024-06-20 17:26:38,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5375, PETRI_PLACES=405, PETRI_TRANSITIONS=419} [2024-06-20 17:26:38,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-20 17:26:38,933 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 419 transitions, 5375 flow [2024-06-20 17:26:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:38,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:38,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:38,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:26:38,933 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:38,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1977443177, now seen corresponding path program 12 times [2024-06-20 17:26:38,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:38,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604045904] [2024-06-20 17:26:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:38,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:42,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604045904] [2024-06-20 17:26:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604045904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:42,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:42,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252092992] [2024-06-20 17:26:42,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:42,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:42,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:26:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 419 transitions, 5375 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:26:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:44,207 INFO L124 PetriNetUnfolderBase]: 3766/6189 cut-off events. [2024-06-20 17:26:44,208 INFO L125 PetriNetUnfolderBase]: For 837797/837803 co-relation queries the response was YES. [2024-06-20 17:26:44,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46395 conditions, 6189 events. 3766/6189 cut-off events. For 837797/837803 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40627 event pairs, 791 based on Foata normal form. 14/6202 useless extension candidates. Maximal degree in co-relation 46209. Up to 5490 conditions per place. [2024-06-20 17:26:44,308 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 86 changer transitions 0/449 dead transitions. [2024-06-20 17:26:44,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 449 transitions, 6371 flow [2024-06-20 17:26:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:26:44,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:26:44,310 INFO L175 Difference]: Start difference. First operand has 405 places, 419 transitions, 5375 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:26:44,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 449 transitions, 6371 flow [2024-06-20 17:26:47,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 449 transitions, 6225 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 17:26:47,531 INFO L231 Difference]: Finished difference. Result has 410 places, 419 transitions, 5405 flow [2024-06-20 17:26:47,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5405, PETRI_PLACES=410, PETRI_TRANSITIONS=419} [2024-06-20 17:26:47,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 17:26:47,532 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 419 transitions, 5405 flow [2024-06-20 17:26:47,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:47,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:47,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:26:47,532 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:47,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash 654109571, now seen corresponding path program 13 times [2024-06-20 17:26:47,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:47,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147883383] [2024-06-20 17:26:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:50,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147883383] [2024-06-20 17:26:50,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147883383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:50,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:50,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:50,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482150774] [2024-06-20 17:26:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:50,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:50,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:50,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:26:50,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 419 transitions, 5405 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:50,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:50,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:26:50,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:53,054 INFO L124 PetriNetUnfolderBase]: 3853/6318 cut-off events. [2024-06-20 17:26:53,054 INFO L125 PetriNetUnfolderBase]: For 929445/929451 co-relation queries the response was YES. [2024-06-20 17:26:53,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48605 conditions, 6318 events. 3853/6318 cut-off events. For 929445/929451 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41665 event pairs, 1072 based on Foata normal form. 14/6331 useless extension candidates. Maximal degree in co-relation 48417. Up to 5778 conditions per place. [2024-06-20 17:26:53,141 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 62 changer transitions 0/452 dead transitions. [2024-06-20 17:26:53,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 452 transitions, 6731 flow [2024-06-20 17:26:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:26:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:26:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 17:26:53,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-20 17:26:53,142 INFO L175 Difference]: Start difference. First operand has 410 places, 419 transitions, 5405 flow. Second operand 10 states and 159 transitions. [2024-06-20 17:26:53,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 452 transitions, 6731 flow [2024-06-20 17:26:56,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 452 transitions, 6551 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:26:56,842 INFO L231 Difference]: Finished difference. Result has 412 places, 421 transitions, 5399 flow [2024-06-20 17:26:56,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5399, PETRI_PLACES=412, PETRI_TRANSITIONS=421} [2024-06-20 17:26:56,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-20 17:26:56,843 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 421 transitions, 5399 flow [2024-06-20 17:26:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:56,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:56,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:26:56,844 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:56,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1293697858, now seen corresponding path program 11 times [2024-06-20 17:26:56,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:56,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034469849] [2024-06-20 17:26:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:56,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15