./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix035_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix035_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:38:57,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:38:57,893 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:38:57,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:38:57,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:38:57,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:38:57,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:38:57,919 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:38:57,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:38:57,920 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:38:57,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:38:57,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:38:57,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:38:57,923 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:38:57,923 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:38:57,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:38:57,924 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:38:57,926 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:38:57,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:38:57,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:38:57,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:38:57,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:38:57,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:38:57,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:38:57,928 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:38:57,928 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:38:57,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:38:57,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:38:57,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:38:57,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:38:57,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:38:57,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:38:57,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:38:57,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:38:57,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:38:57,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:38:57,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:38:57,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:38:57,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:38:57,931 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:38:57,932 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:38:57,932 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:38:57,932 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:38:57,932 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:38:58,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:38:58,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:38:58,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:38:58,109 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:38:58,110 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:38:58,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-27 23:38:59,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:38:59,472 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:38:59,475 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-27 23:38:59,490 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91957833e/ba15a26c87b84024baab999209895dd0/FLAG223ad9c05 [2024-06-27 23:38:59,502 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91957833e/ba15a26c87b84024baab999209895dd0 [2024-06-27 23:38:59,504 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:38:59,505 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:38:59,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix035_pso.opt_tso.opt.yml/witness.yml [2024-06-27 23:38:59,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:38:59,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:38:59,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:38:59,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:38:59,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:38:59,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:38:59" (1/2) ... [2024-06-27 23:38:59,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff6845c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:38:59, skipping insertion in model container [2024-06-27 23:38:59,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:38:59" (1/2) ... [2024-06-27 23:38:59,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f491ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:38:59, skipping insertion in model container [2024-06-27 23:38:59,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:38:59" (2/2) ... [2024-06-27 23:38:59,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff6845c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:38:59, skipping insertion in model container [2024-06-27 23:38:59,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:38:59" (2/2) ... [2024-06-27 23:38:59,595 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:38:59,618 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:38:59,619 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:38:59,619 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:38:59,619 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:38:59,620 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:38:59,620 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 23:38:59,659 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:38:59,955 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:38:59,963 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:39:00,056 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:39:00,090 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:39:00,092 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00 WrapperNode [2024-06-27 23:39:00,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:39:00,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:39:00,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:39:00,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:39:00,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,169 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-27 23:39:00,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:39:00,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:39:00,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:39:00,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:39:00,185 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,190 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,219 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:39:00,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,240 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:39:00,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:39:00,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:39:00,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:39:00,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (1/1) ... [2024-06-27 23:39:00,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:39:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:39:00,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:39:00,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:39:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:39:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:39:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:39:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:39:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:39:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:39:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:39:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:39:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:39:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:39:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:39:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:39:00,343 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:39:00,475 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:39:00,477 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:39:00,903 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:39:00,903 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:39:01,005 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:39:01,005 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:39:01,005 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:39:01 BoogieIcfgContainer [2024-06-27 23:39:01,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:39:01,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:39:01,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:39:01,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:39:01,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:38:59" (1/4) ... [2024-06-27 23:39:01,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a35122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:39:01, skipping insertion in model container [2024-06-27 23:39:01,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:38:59" (2/4) ... [2024-06-27 23:39:01,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a35122 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:39:01, skipping insertion in model container [2024-06-27 23:39:01,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:39:00" (3/4) ... [2024-06-27 23:39:01,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a35122 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:39:01, skipping insertion in model container [2024-06-27 23:39:01,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:39:01" (4/4) ... [2024-06-27 23:39:01,011 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_pso.opt_tso.opt.i [2024-06-27 23:39:01,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:39:01,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:39:01,023 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:39:01,080 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:39:01,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:39:01,122 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 23:39:01,122 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:39:01,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:39:01,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:39:01,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 23:39:01,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:39:01,137 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;@5f64c86a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:39:01,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:39:01,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:39:01,140 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:39:01,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:39:01,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:01,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:39:01,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:01,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 363378819, now seen corresponding path program 1 times [2024-06-27 23:39:01,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093243981] [2024-06-27 23:39:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:02,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093243981] [2024-06-27 23:39:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093243981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:39:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012609931] [2024-06-27 23:39:02,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:39:02,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:39:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:39:02,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-27 23:39:02,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 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) [2024-06-27 23:39:02,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:02,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-27 23:39:02,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:02,714 INFO L124 PetriNetUnfolderBase]: 869/1427 cut-off events. [2024-06-27 23:39:02,715 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 23:39:02,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 1427 events. 869/1427 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7301 event pairs, 566 based on Foata normal form. 1/1369 useless extension candidates. Maximal degree in co-relation 2793. Up to 1315 conditions per place. [2024-06-27 23:39:02,725 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 23:39:02,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-27 23:39:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:39:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:39:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 23:39:02,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 23:39:02,734 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-27 23:39:02,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-27 23:39:02,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:02,738 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 23:39:02,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 23:39:02,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 23:39:02,742 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 23:39:02,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 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) [2024-06-27 23:39:02,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:02,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:02,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:39:02,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:02,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:02,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1314823706, now seen corresponding path program 1 times [2024-06-27 23:39:02,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:02,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354842170] [2024-06-27 23:39:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:02,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:03,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354842170] [2024-06-27 23:39:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354842170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:03,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:03,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:39:03,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046211856] [2024-06-27 23:39:03,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:03,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:39:03,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:39:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:39:03,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:39:03,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:03,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:03,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:39:03,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:03,786 INFO L124 PetriNetUnfolderBase]: 996/1581 cut-off events. [2024-06-27 23:39:03,786 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-06-27 23:39:03,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1581 events. 996/1581 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8009 event pairs, 519 based on Foata normal form. 3/1556 useless extension candidates. Maximal degree in co-relation 3584. Up to 1484 conditions per place. [2024-06-27 23:39:03,794 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 23:39:03,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-27 23:39:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:39:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:39:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-27 23:39:03,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 23:39:03,796 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 104 transitions. [2024-06-27 23:39:03,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-27 23:39:03,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:39:03,797 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 23:39:03,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 23:39:03,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 23:39:03,798 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 23:39:03,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:03,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:03,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:39:03,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:03,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash -188208607, now seen corresponding path program 1 times [2024-06-27 23:39:03,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:03,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580145462] [2024-06-27 23:39:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:05,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580145462] [2024-06-27 23:39:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580145462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:05,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:05,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:05,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527827033] [2024-06-27 23:39:05,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:05,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:05,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:05,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:05,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:39:05,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:05,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:05,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:39:05,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:05,465 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-27 23:39:05,465 INFO L125 PetriNetUnfolderBase]: For 1076/1076 co-relation queries the response was YES. [2024-06-27 23:39:05,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4970 conditions, 1973 events. 1265/1973 cut-off events. For 1076/1076 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9692 event pairs, 445 based on Foata normal form. 6/1942 useless extension candidates. Maximal degree in co-relation 4956. Up to 1828 conditions per place. [2024-06-27 23:39:05,475 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-27 23:39:05,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 350 flow [2024-06-27 23:39:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:39:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:39:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 23:39:05,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-27 23:39:05,477 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 143 transitions. [2024-06-27 23:39:05,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 350 flow [2024-06-27 23:39:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:39:05,479 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 23:39:05,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 23:39:05,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 23:39:05,480 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 23:39:05,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:05,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:05,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:05,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:39:05,480 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)] === [2024-06-27 23:39:05,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash 632564042, now seen corresponding path program 1 times [2024-06-27 23:39:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:05,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73950155] [2024-06-27 23:39:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:06,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73950155] [2024-06-27 23:39:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73950155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:39:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922395831] [2024-06-27 23:39:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:06,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:39:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:39:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:39:06,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:39:06,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:06,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:06,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:39:06,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:07,057 INFO L124 PetriNetUnfolderBase]: 1085/1771 cut-off events. [2024-06-27 23:39:07,057 INFO L125 PetriNetUnfolderBase]: For 1968/1968 co-relation queries the response was YES. [2024-06-27 23:39:07,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 1771 events. 1085/1771 cut-off events. For 1968/1968 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9093 event pairs, 630 based on Foata normal form. 4/1741 useless extension candidates. Maximal degree in co-relation 4811. Up to 1611 conditions per place. [2024-06-27 23:39:07,066 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 42 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-27 23:39:07,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 338 flow [2024-06-27 23:39:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:39:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:39:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 23:39:07,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-06-27 23:39:07,069 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 106 transitions. [2024-06-27 23:39:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 338 flow [2024-06-27 23:39:07,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 309 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:07,073 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 218 flow [2024-06-27 23:39:07,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 23:39:07,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 23:39:07,075 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 218 flow [2024-06-27 23:39:07,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:07,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:07,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:07,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:39:07,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:07,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash 738498925, now seen corresponding path program 1 times [2024-06-27 23:39:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813465733] [2024-06-27 23:39:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813465733] [2024-06-27 23:39:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813465733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:08,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:08,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:08,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585184034] [2024-06-27 23:39:08,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:08,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:08,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:08,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:08,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:08,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:08,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:08,804 INFO L124 PetriNetUnfolderBase]: 1309/2060 cut-off events. [2024-06-27 23:39:08,805 INFO L125 PetriNetUnfolderBase]: For 3305/3305 co-relation queries the response was YES. [2024-06-27 23:39:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6174 conditions, 2060 events. 1309/2060 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10277 event pairs, 651 based on Foata normal form. 4/2035 useless extension candidates. Maximal degree in co-relation 6153. Up to 1852 conditions per place. [2024-06-27 23:39:08,819 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 59 selfloop transitions, 24 changer transitions 0/89 dead transitions. [2024-06-27 23:39:08,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 89 transitions, 551 flow [2024-06-27 23:39:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:39:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:39:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 23:39:08,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 23:39:08,822 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 218 flow. Second operand 7 states and 150 transitions. [2024-06-27 23:39:08,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 89 transitions, 551 flow [2024-06-27 23:39:08,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 535 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:39:08,828 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 363 flow [2024-06-27 23:39:08,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2024-06-27 23:39:08,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-27 23:39:08,830 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 363 flow [2024-06-27 23:39:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:08,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:08,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:08,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:39:08,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:08,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1669713967, now seen corresponding path program 2 times [2024-06-27 23:39:08,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:08,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269645952] [2024-06-27 23:39:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:08,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:10,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:10,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269645952] [2024-06-27 23:39:10,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269645952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:10,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:10,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515714971] [2024-06-27 23:39:10,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:10,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:10,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:10,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:10,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:10,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:10,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:10,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:10,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:10,746 INFO L124 PetriNetUnfolderBase]: 1366/2148 cut-off events. [2024-06-27 23:39:10,746 INFO L125 PetriNetUnfolderBase]: For 5193/5193 co-relation queries the response was YES. [2024-06-27 23:39:10,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7227 conditions, 2148 events. 1366/2148 cut-off events. For 5193/5193 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10727 event pairs, 661 based on Foata normal form. 6/2120 useless extension candidates. Maximal degree in co-relation 7202. Up to 1902 conditions per place. [2024-06-27 23:39:10,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 36 changer transitions 0/94 dead transitions. [2024-06-27 23:39:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 727 flow [2024-06-27 23:39:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:39:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:39:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 23:39:10,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 23:39:10,760 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 363 flow. Second operand 6 states and 129 transitions. [2024-06-27 23:39:10,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 727 flow [2024-06-27 23:39:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 697 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 23:39:10,766 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 552 flow [2024-06-27 23:39:10,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=552, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-27 23:39:10,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 23:39:10,767 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 552 flow [2024-06-27 23:39:10,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:10,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:10,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:10,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:39:10,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:10,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1961772597, now seen corresponding path program 3 times [2024-06-27 23:39:10,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:10,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910784910] [2024-06-27 23:39:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910784910] [2024-06-27 23:39:11,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910784910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:11,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:11,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:11,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331417516] [2024-06-27 23:39:11,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:11,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:11,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:11,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:12,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:12,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:12,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:12,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:12,567 INFO L124 PetriNetUnfolderBase]: 1350/2128 cut-off events. [2024-06-27 23:39:12,567 INFO L125 PetriNetUnfolderBase]: For 6368/6368 co-relation queries the response was YES. [2024-06-27 23:39:12,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 2128 events. 1350/2128 cut-off events. For 6368/6368 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10622 event pairs, 649 based on Foata normal form. 6/2103 useless extension candidates. Maximal degree in co-relation 7359. Up to 1889 conditions per place. [2024-06-27 23:39:12,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 49 selfloop transitions, 37 changer transitions 0/92 dead transitions. [2024-06-27 23:39:12,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 778 flow [2024-06-27 23:39:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:39:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:39:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 23:39:12,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 23:39:12,584 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 552 flow. Second operand 6 states and 124 transitions. [2024-06-27 23:39:12,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 778 flow [2024-06-27 23:39:12,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 709 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-27 23:39:12,591 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 570 flow [2024-06-27 23:39:12,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-27 23:39:12,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-27 23:39:12,592 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 570 flow [2024-06-27 23:39:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:12,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:39:12,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:12,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:12,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1606404247, now seen corresponding path program 1 times [2024-06-27 23:39:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:12,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333246586] [2024-06-27 23:39:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:12,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333246586] [2024-06-27 23:39:13,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333246586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:13,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:13,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:13,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147225231] [2024-06-27 23:39:13,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:13,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:13,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:13,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:13,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 570 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:13,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:13,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:13,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:14,373 INFO L124 PetriNetUnfolderBase]: 1436/2282 cut-off events. [2024-06-27 23:39:14,373 INFO L125 PetriNetUnfolderBase]: For 8026/8028 co-relation queries the response was YES. [2024-06-27 23:39:14,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8053 conditions, 2282 events. 1436/2282 cut-off events. For 8026/8028 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11537 event pairs, 637 based on Foata normal form. 6/2272 useless extension candidates. Maximal degree in co-relation 8019. Up to 2033 conditions per place. [2024-06-27 23:39:14,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 88 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-27 23:39:14,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 128 transitions, 1060 flow [2024-06-27 23:39:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 23:39:14,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 23:39:14,402 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 570 flow. Second operand 10 states and 201 transitions. [2024-06-27 23:39:14,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 128 transitions, 1060 flow [2024-06-27 23:39:14,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 1003 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:14,411 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 709 flow [2024-06-27 23:39:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=709, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-27 23:39:14,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 23:39:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 709 flow [2024-06-27 23:39:14,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:39:14,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:14,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1417675653, now seen corresponding path program 2 times [2024-06-27 23:39:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254895772] [2024-06-27 23:39:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254895772] [2024-06-27 23:39:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254895772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:15,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:15,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987417276] [2024-06-27 23:39:15,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:15,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:15,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 709 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:15,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:15,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:15,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:16,278 INFO L124 PetriNetUnfolderBase]: 1505/2390 cut-off events. [2024-06-27 23:39:16,278 INFO L125 PetriNetUnfolderBase]: For 10784/10786 co-relation queries the response was YES. [2024-06-27 23:39:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 2390 events. 1505/2390 cut-off events. For 10784/10786 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12103 event pairs, 530 based on Foata normal form. 8/2385 useless extension candidates. Maximal degree in co-relation 9028. Up to 2143 conditions per place. [2024-06-27 23:39:16,292 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/132 dead transitions. [2024-06-27 23:39:16,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 132 transitions, 1194 flow [2024-06-27 23:39:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:39:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:39:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:39:16,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 23:39:16,293 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 709 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:39:16,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 132 transitions, 1194 flow [2024-06-27 23:39:16,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 132 transitions, 1099 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:39:16,304 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 890 flow [2024-06-27 23:39:16,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=890, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2024-06-27 23:39:16,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 23:39:16,305 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 890 flow [2024-06-27 23:39:16,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:16,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:16,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:39:16,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:16,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -757089817, now seen corresponding path program 3 times [2024-06-27 23:39:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325950631] [2024-06-27 23:39:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:17,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325950631] [2024-06-27 23:39:17,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325950631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:17,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:17,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:17,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287115521] [2024-06-27 23:39:17,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:17,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:17,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:17,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:17,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:17,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:17,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:18,281 INFO L124 PetriNetUnfolderBase]: 1547/2470 cut-off events. [2024-06-27 23:39:18,281 INFO L125 PetriNetUnfolderBase]: For 12910/12910 co-relation queries the response was YES. [2024-06-27 23:39:18,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9688 conditions, 2470 events. 1547/2470 cut-off events. For 12910/12910 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12658 event pairs, 461 based on Foata normal form. 4/2458 useless extension candidates. Maximal degree in co-relation 9648. Up to 1960 conditions per place. [2024-06-27 23:39:18,293 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 72 selfloop transitions, 72 changer transitions 0/150 dead transitions. [2024-06-27 23:39:18,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1433 flow [2024-06-27 23:39:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:39:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:39:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:39:18,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 23:39:18,294 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 890 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:39:18,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1433 flow [2024-06-27 23:39:18,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 1372 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:18,312 INFO L231 Difference]: Finished difference. Result has 91 places, 118 transitions, 1112 flow [2024-06-27 23:39:18,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1112, PETRI_PLACES=91, PETRI_TRANSITIONS=118} [2024-06-27 23:39:18,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 23:39:18,316 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 118 transitions, 1112 flow [2024-06-27 23:39:18,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:18,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:18,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:18,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:39:18,317 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:18,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 803841967, now seen corresponding path program 4 times [2024-06-27 23:39:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:18,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822240897] [2024-06-27 23:39:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:19,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:19,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822240897] [2024-06-27 23:39:19,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822240897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:19,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:19,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319242001] [2024-06-27 23:39:19,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:19,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:19,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:19,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 118 transitions, 1112 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:19,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:19,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:19,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:20,471 INFO L124 PetriNetUnfolderBase]: 1573/2515 cut-off events. [2024-06-27 23:39:20,472 INFO L125 PetriNetUnfolderBase]: For 16395/16395 co-relation queries the response was YES. [2024-06-27 23:39:20,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10561 conditions, 2515 events. 1573/2515 cut-off events. For 16395/16395 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12920 event pairs, 530 based on Foata normal form. 6/2502 useless extension candidates. Maximal degree in co-relation 10519. Up to 2227 conditions per place. [2024-06-27 23:39:20,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 47 changer transitions 0/149 dead transitions. [2024-06-27 23:39:20,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 149 transitions, 1582 flow [2024-06-27 23:39:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:39:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:39:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:39:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 23:39:20,489 INFO L175 Difference]: Start difference. First operand has 91 places, 118 transitions, 1112 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:39:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 149 transitions, 1582 flow [2024-06-27 23:39:20,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 149 transitions, 1475 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 23:39:20,508 INFO L231 Difference]: Finished difference. Result has 95 places, 131 transitions, 1256 flow [2024-06-27 23:39:20,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=95, PETRI_TRANSITIONS=131} [2024-06-27 23:39:20,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 23:39:20,509 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 131 transitions, 1256 flow [2024-06-27 23:39:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:20,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:20,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:20,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:39:20,509 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:20,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash 803961937, now seen corresponding path program 5 times [2024-06-27 23:39:20,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:20,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162382824] [2024-06-27 23:39:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:21,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162382824] [2024-06-27 23:39:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162382824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:21,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:21,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:21,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655567798] [2024-06-27 23:39:21,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:21,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:21,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:21,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:21,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:21,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 131 transitions, 1256 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:21,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:21,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:21,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:22,798 INFO L124 PetriNetUnfolderBase]: 1623/2607 cut-off events. [2024-06-27 23:39:22,798 INFO L125 PetriNetUnfolderBase]: For 18017/18017 co-relation queries the response was YES. [2024-06-27 23:39:22,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10937 conditions, 2607 events. 1623/2607 cut-off events. For 18017/18017 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13636 event pairs, 501 based on Foata normal form. 6/2582 useless extension candidates. Maximal degree in co-relation 10894. Up to 2028 conditions per place. [2024-06-27 23:39:22,813 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 70 selfloop transitions, 88 changer transitions 0/164 dead transitions. [2024-06-27 23:39:22,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1787 flow [2024-06-27 23:39:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:39:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:39:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 23:39:22,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 23:39:22,814 INFO L175 Difference]: Start difference. First operand has 95 places, 131 transitions, 1256 flow. Second operand 7 states and 152 transitions. [2024-06-27 23:39:22,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1787 flow [2024-06-27 23:39:22,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 164 transitions, 1732 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:22,837 INFO L231 Difference]: Finished difference. Result has 99 places, 140 transitions, 1481 flow [2024-06-27 23:39:22,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1481, PETRI_PLACES=99, PETRI_TRANSITIONS=140} [2024-06-27 23:39:22,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-27 23:39:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 140 transitions, 1481 flow [2024-06-27 23:39:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:22,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:22,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:22,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:39:22,838 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:22,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash -662169885, now seen corresponding path program 6 times [2024-06-27 23:39:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856843122] [2024-06-27 23:39:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:24,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:24,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856843122] [2024-06-27 23:39:24,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856843122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:24,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:24,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673044278] [2024-06-27 23:39:24,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:24,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:24,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:24,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:24,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 140 transitions, 1481 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:24,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:24,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:24,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:24,756 INFO L124 PetriNetUnfolderBase]: 1607/2588 cut-off events. [2024-06-27 23:39:24,757 INFO L125 PetriNetUnfolderBase]: For 21219/21219 co-relation queries the response was YES. [2024-06-27 23:39:24,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11177 conditions, 2588 events. 1607/2588 cut-off events. For 21219/21219 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13497 event pairs, 478 based on Foata normal form. 6/2570 useless extension candidates. Maximal degree in co-relation 11132. Up to 2015 conditions per place. [2024-06-27 23:39:24,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 91 changer transitions 0/161 dead transitions. [2024-06-27 23:39:24,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 1876 flow [2024-06-27 23:39:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:39:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:39:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 23:39:24,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-27 23:39:24,773 INFO L175 Difference]: Start difference. First operand has 99 places, 140 transitions, 1481 flow. Second operand 7 states and 146 transitions. [2024-06-27 23:39:24,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 1876 flow [2024-06-27 23:39:24,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 161 transitions, 1733 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 23:39:24,796 INFO L231 Difference]: Finished difference. Result has 104 places, 140 transitions, 1534 flow [2024-06-27 23:39:24,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1534, PETRI_PLACES=104, PETRI_TRANSITIONS=140} [2024-06-27 23:39:24,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 23:39:24,797 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 140 transitions, 1534 flow [2024-06-27 23:39:24,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:24,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:24,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:24,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:39:24,797 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:24,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash 981339721, now seen corresponding path program 1 times [2024-06-27 23:39:24,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:24,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866529241] [2024-06-27 23:39:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:24,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:26,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:26,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866529241] [2024-06-27 23:39:26,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866529241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:26,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:26,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:26,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898710207] [2024-06-27 23:39:26,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:26,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:26,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:39:26,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 140 transitions, 1534 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:26,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:26,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:39:26,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:27,276 INFO L124 PetriNetUnfolderBase]: 1429/2371 cut-off events. [2024-06-27 23:39:27,276 INFO L125 PetriNetUnfolderBase]: For 21808/21808 co-relation queries the response was YES. [2024-06-27 23:39:27,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10267 conditions, 2371 events. 1429/2371 cut-off events. For 21808/21808 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12628 event pairs, 631 based on Foata normal form. 4/2352 useless extension candidates. Maximal degree in co-relation 10219. Up to 2091 conditions per place. [2024-06-27 23:39:27,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 15 changer transitions 0/164 dead transitions. [2024-06-27 23:39:27,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 164 transitions, 1980 flow [2024-06-27 23:39:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:39:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:39:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:39:27,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 23:39:27,291 INFO L175 Difference]: Start difference. First operand has 104 places, 140 transitions, 1534 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:39:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 164 transitions, 1980 flow [2024-06-27 23:39:27,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 164 transitions, 1838 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:39:27,316 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1491 flow [2024-06-27 23:39:27,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-27 23:39:27,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 23:39:27,317 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1491 flow [2024-06-27 23:39:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:27,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:27,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:27,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:39:27,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:27,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash -176693047, now seen corresponding path program 1 times [2024-06-27 23:39:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:27,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256446193] [2024-06-27 23:39:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:28,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:28,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256446193] [2024-06-27 23:39:28,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256446193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:28,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:28,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:39:28,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653901273] [2024-06-27 23:39:28,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:28,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:39:28,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:28,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:39:28,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:39:28,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:39:28,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1491 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:28,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:28,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:39:28,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:28,662 INFO L124 PetriNetUnfolderBase]: 1283/2181 cut-off events. [2024-06-27 23:39:28,662 INFO L125 PetriNetUnfolderBase]: For 22936/22940 co-relation queries the response was YES. [2024-06-27 23:39:28,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9713 conditions, 2181 events. 1283/2181 cut-off events. For 22936/22940 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11945 event pairs, 609 based on Foata normal form. 5/2140 useless extension candidates. Maximal degree in co-relation 9663. Up to 1913 conditions per place. [2024-06-27 23:39:28,680 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 10 changer transitions 0/155 dead transitions. [2024-06-27 23:39:28,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 155 transitions, 1809 flow [2024-06-27 23:39:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:39:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:39:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 23:39:28,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:39:28,689 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1491 flow. Second operand 5 states and 105 transitions. [2024-06-27 23:39:28,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 155 transitions, 1809 flow [2024-06-27 23:39:28,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 155 transitions, 1757 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:28,746 INFO L231 Difference]: Finished difference. Result has 107 places, 148 transitions, 1489 flow [2024-06-27 23:39:28,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1489, PETRI_PLACES=107, PETRI_TRANSITIONS=148} [2024-06-27 23:39:28,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 23:39:28,748 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 148 transitions, 1489 flow [2024-06-27 23:39:28,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:28,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:28,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:28,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:39:28,749 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:28,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1182515531, now seen corresponding path program 1 times [2024-06-27 23:39:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406196563] [2024-06-27 23:39:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:28,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406196563] [2024-06-27 23:39:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406196563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:29,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:29,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:29,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057376020] [2024-06-27 23:39:29,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:29,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:29,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:39:29,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 148 transitions, 1489 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:29,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:29,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:39:29,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:30,276 INFO L124 PetriNetUnfolderBase]: 1435/2369 cut-off events. [2024-06-27 23:39:30,276 INFO L125 PetriNetUnfolderBase]: For 28010/28014 co-relation queries the response was YES. [2024-06-27 23:39:30,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11000 conditions, 2369 events. 1435/2369 cut-off events. For 28010/28014 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12720 event pairs, 695 based on Foata normal form. 5/2353 useless extension candidates. Maximal degree in co-relation 10951. Up to 2136 conditions per place. [2024-06-27 23:39:30,290 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 129 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2024-06-27 23:39:30,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 159 transitions, 1823 flow [2024-06-27 23:39:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:39:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:39:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 23:39:30,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:39:30,292 INFO L175 Difference]: Start difference. First operand has 107 places, 148 transitions, 1489 flow. Second operand 6 states and 117 transitions. [2024-06-27 23:39:30,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 159 transitions, 1823 flow [2024-06-27 23:39:30,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1795 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:30,318 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1521 flow [2024-06-27 23:39:30,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1521, PETRI_PLACES=110, PETRI_TRANSITIONS=151} [2024-06-27 23:39:30,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 23:39:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1521 flow [2024-06-27 23:39:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:30,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:30,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:39:30,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:30,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1184870700, now seen corresponding path program 1 times [2024-06-27 23:39:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:30,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857490429] [2024-06-27 23:39:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:31,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857490429] [2024-06-27 23:39:31,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857490429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:31,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:31,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:31,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697193263] [2024-06-27 23:39:31,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:31,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:31,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:31,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:31,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:31,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 151 transitions, 1521 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:31,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:31,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:31,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:32,439 INFO L124 PetriNetUnfolderBase]: 1835/2960 cut-off events. [2024-06-27 23:39:32,439 INFO L125 PetriNetUnfolderBase]: For 40250/40252 co-relation queries the response was YES. [2024-06-27 23:39:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14275 conditions, 2960 events. 1835/2960 cut-off events. For 40250/40252 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16052 event pairs, 653 based on Foata normal form. 18/2976 useless extension candidates. Maximal degree in co-relation 14225. Up to 2247 conditions per place. [2024-06-27 23:39:32,456 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 131 selfloop transitions, 68 changer transitions 0/206 dead transitions. [2024-06-27 23:39:32,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 2219 flow [2024-06-27 23:39:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:39:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:39:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-27 23:39:32,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48917748917748916 [2024-06-27 23:39:32,458 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1521 flow. Second operand 11 states and 226 transitions. [2024-06-27 23:39:32,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 2219 flow [2024-06-27 23:39:32,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 206 transitions, 2181 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:39:32,539 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1687 flow [2024-06-27 23:39:32,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1687, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-27 23:39:32,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 23:39:32,545 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1687 flow [2024-06-27 23:39:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:32,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:39:32,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:32,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 357452490, now seen corresponding path program 2 times [2024-06-27 23:39:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069736967] [2024-06-27 23:39:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:33,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:33,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069736967] [2024-06-27 23:39:33,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069736967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:33,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:33,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:33,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081369932] [2024-06-27 23:39:33,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:33,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:33,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:33,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:33,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1687 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:33,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:33,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:33,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:34,653 INFO L124 PetriNetUnfolderBase]: 1871/3021 cut-off events. [2024-06-27 23:39:34,653 INFO L125 PetriNetUnfolderBase]: For 45302/45304 co-relation queries the response was YES. [2024-06-27 23:39:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15058 conditions, 3021 events. 1871/3021 cut-off events. For 45302/45304 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16466 event pairs, 741 based on Foata normal form. 22/3041 useless extension candidates. Maximal degree in co-relation 15006. Up to 2487 conditions per place. [2024-06-27 23:39:34,671 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 65 changer transitions 0/199 dead transitions. [2024-06-27 23:39:34,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 199 transitions, 2258 flow [2024-06-27 23:39:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:39:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:39:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 23:39:34,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-27 23:39:34,676 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1687 flow. Second operand 11 states and 219 transitions. [2024-06-27 23:39:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 199 transitions, 2258 flow [2024-06-27 23:39:34,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 199 transitions, 2168 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:34,721 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1759 flow [2024-06-27 23:39:34,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1759, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-06-27 23:39:34,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 23:39:34,722 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1759 flow [2024-06-27 23:39:34,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:34,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:34,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:39:34,723 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:34,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1020165554, now seen corresponding path program 3 times [2024-06-27 23:39:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:34,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130454958] [2024-06-27 23:39:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:35,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:35,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130454958] [2024-06-27 23:39:35,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130454958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:35,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:35,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:39:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412631792] [2024-06-27 23:39:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:39:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:39:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:39:35,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:39:35,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1759 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:35,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:35,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:39:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:36,550 INFO L124 PetriNetUnfolderBase]: 1661/2958 cut-off events. [2024-06-27 23:39:36,551 INFO L125 PetriNetUnfolderBase]: For 52177/52250 co-relation queries the response was YES. [2024-06-27 23:39:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 2958 events. 1661/2958 cut-off events. For 52177/52250 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18398 event pairs, 419 based on Foata normal form. 43/2939 useless extension candidates. Maximal degree in co-relation 15147. Up to 1726 conditions per place. [2024-06-27 23:39:36,570 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 56 changer transitions 0/206 dead transitions. [2024-06-27 23:39:36,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 206 transitions, 2401 flow [2024-06-27 23:39:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-27 23:39:36,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 23:39:36,572 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1759 flow. Second operand 10 states and 225 transitions. [2024-06-27 23:39:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 206 transitions, 2401 flow [2024-06-27 23:39:36,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 2272 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 23:39:36,627 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1877 flow [2024-06-27 23:39:36,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1877, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-27 23:39:36,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-27 23:39:36,628 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1877 flow [2024-06-27 23:39:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:36,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:36,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:36,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:39:36,629 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:36,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:36,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1831940284, now seen corresponding path program 4 times [2024-06-27 23:39:36,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:36,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864527914] [2024-06-27 23:39:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:36,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:37,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864527914] [2024-06-27 23:39:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864527914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:37,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:37,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978480920] [2024-06-27 23:39:37,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:37,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:38,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:38,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1877 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:38,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:38,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:38,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:39,017 INFO L124 PetriNetUnfolderBase]: 2646/4314 cut-off events. [2024-06-27 23:39:39,017 INFO L125 PetriNetUnfolderBase]: For 75850/75852 co-relation queries the response was YES. [2024-06-27 23:39:39,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23188 conditions, 4314 events. 2646/4314 cut-off events. For 75850/75852 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26009 event pairs, 854 based on Foata normal form. 26/4338 useless extension candidates. Maximal degree in co-relation 23131. Up to 3231 conditions per place. [2024-06-27 23:39:39,045 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 152 selfloop transitions, 63 changer transitions 0/222 dead transitions. [2024-06-27 23:39:39,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 222 transitions, 2786 flow [2024-06-27 23:39:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 23:39:39,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-27 23:39:39,047 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1877 flow. Second operand 10 states and 207 transitions. [2024-06-27 23:39:39,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 222 transitions, 2786 flow [2024-06-27 23:39:39,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2686 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:39,133 INFO L231 Difference]: Finished difference. Result has 130 places, 177 transitions, 2193 flow [2024-06-27 23:39:39,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2193, PETRI_PLACES=130, PETRI_TRANSITIONS=177} [2024-06-27 23:39:39,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 23:39:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 177 transitions, 2193 flow [2024-06-27 23:39:39,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:39,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:39,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:39,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:39:39,134 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:39,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash -4079620, now seen corresponding path program 5 times [2024-06-27 23:39:39,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:39,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776302373] [2024-06-27 23:39:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:39,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:40,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776302373] [2024-06-27 23:39:40,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776302373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:40,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:40,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505766884] [2024-06-27 23:39:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:40,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:40,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:40,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 177 transitions, 2193 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:40,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:40,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:40,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:41,559 INFO L124 PetriNetUnfolderBase]: 2564/4196 cut-off events. [2024-06-27 23:39:41,560 INFO L125 PetriNetUnfolderBase]: For 68231/68233 co-relation queries the response was YES. [2024-06-27 23:39:41,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22017 conditions, 4196 events. 2564/4196 cut-off events. For 68231/68233 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25203 event pairs, 894 based on Foata normal form. 42/4236 useless extension candidates. Maximal degree in co-relation 21960. Up to 3485 conditions per place. [2024-06-27 23:39:41,589 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 150 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-27 23:39:41,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2730 flow [2024-06-27 23:39:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 23:39:41,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 23:39:41,591 INFO L175 Difference]: Start difference. First operand has 130 places, 177 transitions, 2193 flow. Second operand 9 states and 183 transitions. [2024-06-27 23:39:41,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2730 flow [2024-06-27 23:39:41,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 210 transitions, 2633 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:41,677 INFO L231 Difference]: Finished difference. Result has 133 places, 177 transitions, 2222 flow [2024-06-27 23:39:41,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2222, PETRI_PLACES=133, PETRI_TRANSITIONS=177} [2024-06-27 23:39:41,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 23:39:41,678 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 177 transitions, 2222 flow [2024-06-27 23:39:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:41,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:41,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:39:41,679 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:41,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash 389030, now seen corresponding path program 6 times [2024-06-27 23:39:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367776632] [2024-06-27 23:39:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:42,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367776632] [2024-06-27 23:39:42,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367776632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:42,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:42,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:42,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384850829] [2024-06-27 23:39:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:42,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:43,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:43,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 177 transitions, 2222 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:43,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:43,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:43,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:44,074 INFO L124 PetriNetUnfolderBase]: 2639/4328 cut-off events. [2024-06-27 23:39:44,075 INFO L125 PetriNetUnfolderBase]: For 69459/69462 co-relation queries the response was YES. [2024-06-27 23:39:44,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22782 conditions, 4328 events. 2639/4328 cut-off events. For 69459/69462 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26323 event pairs, 789 based on Foata normal form. 20/4344 useless extension candidates. Maximal degree in co-relation 22723. Up to 3543 conditions per place. [2024-06-27 23:39:44,105 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 97 changer transitions 0/215 dead transitions. [2024-06-27 23:39:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 215 transitions, 2818 flow [2024-06-27 23:39:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 23:39:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-27 23:39:44,107 INFO L175 Difference]: Start difference. First operand has 133 places, 177 transitions, 2222 flow. Second operand 9 states and 190 transitions. [2024-06-27 23:39:44,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 215 transitions, 2818 flow [2024-06-27 23:39:44,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 215 transitions, 2718 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:44,199 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 2345 flow [2024-06-27 23:39:44,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2345, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-06-27 23:39:44,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 23:39:44,199 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 2345 flow [2024-06-27 23:39:44,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:44,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:44,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:39:44,200 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:44,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1713607456, now seen corresponding path program 1 times [2024-06-27 23:39:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:44,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333934455] [2024-06-27 23:39:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333934455] [2024-06-27 23:39:45,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333934455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:45,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:45,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780251403] [2024-06-27 23:39:45,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:45,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:45,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:45,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 2345 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:45,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:45,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:45,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:46,815 INFO L124 PetriNetUnfolderBase]: 2656/4368 cut-off events. [2024-06-27 23:39:46,815 INFO L125 PetriNetUnfolderBase]: For 73496/73501 co-relation queries the response was YES. [2024-06-27 23:39:46,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23354 conditions, 4368 events. 2656/4368 cut-off events. For 73496/73501 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26926 event pairs, 1115 based on Foata normal form. 6/4370 useless extension candidates. Maximal degree in co-relation 23294. Up to 3924 conditions per place. [2024-06-27 23:39:46,846 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 162 selfloop transitions, 47 changer transitions 0/216 dead transitions. [2024-06-27 23:39:46,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2976 flow [2024-06-27 23:39:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:39:46,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 23:39:46,849 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 2345 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:39:46,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2976 flow [2024-06-27 23:39:46,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 216 transitions, 2771 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:46,934 INFO L231 Difference]: Finished difference. Result has 138 places, 185 transitions, 2334 flow [2024-06-27 23:39:46,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=138, PETRI_TRANSITIONS=185} [2024-06-27 23:39:46,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 23:39:46,935 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 185 transitions, 2334 flow [2024-06-27 23:39:46,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:46,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:46,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:46,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:39:46,936 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)] === [2024-06-27 23:39:46,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1423327072, now seen corresponding path program 1 times [2024-06-27 23:39:46,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:46,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037423087] [2024-06-27 23:39:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:47,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:47,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037423087] [2024-06-27 23:39:47,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037423087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:47,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:47,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:47,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881272237] [2024-06-27 23:39:47,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:47,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:48,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:39:48,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 185 transitions, 2334 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:48,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:48,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:39:48,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:48,710 INFO L124 PetriNetUnfolderBase]: 2560/4239 cut-off events. [2024-06-27 23:39:48,710 INFO L125 PetriNetUnfolderBase]: For 75597/75598 co-relation queries the response was YES. [2024-06-27 23:39:48,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23185 conditions, 4239 events. 2560/4239 cut-off events. For 75597/75598 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26153 event pairs, 920 based on Foata normal form. 3/4211 useless extension candidates. Maximal degree in co-relation 23123. Up to 3818 conditions per place. [2024-06-27 23:39:48,738 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 146 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-06-27 23:39:48,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 205 transitions, 2790 flow [2024-06-27 23:39:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:39:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:39:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 23:39:48,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 23:39:48,739 INFO L175 Difference]: Start difference. First operand has 138 places, 185 transitions, 2334 flow. Second operand 7 states and 142 transitions. [2024-06-27 23:39:48,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 205 transitions, 2790 flow [2024-06-27 23:39:48,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 205 transitions, 2680 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:48,827 INFO L231 Difference]: Finished difference. Result has 139 places, 188 transitions, 2340 flow [2024-06-27 23:39:48,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2340, PETRI_PLACES=139, PETRI_TRANSITIONS=188} [2024-06-27 23:39:48,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 23:39:48,828 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 188 transitions, 2340 flow [2024-06-27 23:39:48,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:48,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:48,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:39:48,828 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:48,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -601934034, now seen corresponding path program 7 times [2024-06-27 23:39:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:48,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29166274] [2024-06-27 23:39:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29166274] [2024-06-27 23:39:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29166274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:50,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:50,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905594449] [2024-06-27 23:39:50,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:50,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:50,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:50,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 188 transitions, 2340 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:50,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:50,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:50,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:51,490 INFO L124 PetriNetUnfolderBase]: 2854/4693 cut-off events. [2024-06-27 23:39:51,490 INFO L125 PetriNetUnfolderBase]: For 88254/88254 co-relation queries the response was YES. [2024-06-27 23:39:51,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25437 conditions, 4693 events. 2854/4693 cut-off events. For 88254/88254 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28969 event pairs, 936 based on Foata normal form. 40/4725 useless extension candidates. Maximal degree in co-relation 25374. Up to 3888 conditions per place. [2024-06-27 23:39:51,523 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 52 changer transitions 0/219 dead transitions. [2024-06-27 23:39:51,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 219 transitions, 2956 flow [2024-06-27 23:39:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:39:51,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 23:39:51,525 INFO L175 Difference]: Start difference. First operand has 139 places, 188 transitions, 2340 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:39:51,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 219 transitions, 2956 flow [2024-06-27 23:39:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 219 transitions, 2870 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:39:51,628 INFO L231 Difference]: Finished difference. Result has 143 places, 192 transitions, 2468 flow [2024-06-27 23:39:51,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2468, PETRI_PLACES=143, PETRI_TRANSITIONS=192} [2024-06-27 23:39:51,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 23:39:51,630 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 192 transitions, 2468 flow [2024-06-27 23:39:51,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:51,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:51,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:39:51,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:51,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -604790994, now seen corresponding path program 8 times [2024-06-27 23:39:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890577364] [2024-06-27 23:39:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890577364] [2024-06-27 23:39:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890577364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420023736] [2024-06-27 23:39:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:53,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:53,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:53,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 192 transitions, 2468 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:53,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:53,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:53,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:54,459 INFO L124 PetriNetUnfolderBase]: 2955/4878 cut-off events. [2024-06-27 23:39:54,460 INFO L125 PetriNetUnfolderBase]: For 86716/86716 co-relation queries the response was YES. [2024-06-27 23:39:54,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26215 conditions, 4878 events. 2955/4878 cut-off events. For 86716/86716 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30522 event pairs, 891 based on Foata normal form. 24/4894 useless extension candidates. Maximal degree in co-relation 26151. Up to 3712 conditions per place. [2024-06-27 23:39:54,492 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 65 changer transitions 0/238 dead transitions. [2024-06-27 23:39:54,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 238 transitions, 3199 flow [2024-06-27 23:39:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:39:54,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 23:39:54,494 INFO L175 Difference]: Start difference. First operand has 143 places, 192 transitions, 2468 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:39:54,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 238 transitions, 3199 flow [2024-06-27 23:39:54,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 238 transitions, 3078 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:54,606 INFO L231 Difference]: Finished difference. Result has 147 places, 201 transitions, 2646 flow [2024-06-27 23:39:54,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2646, PETRI_PLACES=147, PETRI_TRANSITIONS=201} [2024-06-27 23:39:54,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 23:39:54,606 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 201 transitions, 2646 flow [2024-06-27 23:39:54,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:54,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:54,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:54,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:39:54,607 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:54,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash -486642864, now seen corresponding path program 9 times [2024-06-27 23:39:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:54,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052047853] [2024-06-27 23:39:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:56,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052047853] [2024-06-27 23:39:56,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052047853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:56,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:56,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654457627] [2024-06-27 23:39:56,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:56,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:56,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:56,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 201 transitions, 2646 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:56,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:56,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:56,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:57,301 INFO L124 PetriNetUnfolderBase]: 3079/5075 cut-off events. [2024-06-27 23:39:57,301 INFO L125 PetriNetUnfolderBase]: For 91972/91975 co-relation queries the response was YES. [2024-06-27 23:39:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27537 conditions, 5075 events. 3079/5075 cut-off events. For 91972/91975 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32175 event pairs, 929 based on Foata normal form. 20/5081 useless extension candidates. Maximal degree in co-relation 27471. Up to 4183 conditions per place. [2024-06-27 23:39:57,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 95 changer transitions 0/235 dead transitions. [2024-06-27 23:39:57,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 235 transitions, 3286 flow [2024-06-27 23:39:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:39:57,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 23:39:57,339 INFO L175 Difference]: Start difference. First operand has 147 places, 201 transitions, 2646 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:39:57,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 235 transitions, 3286 flow [2024-06-27 23:39:57,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 235 transitions, 3166 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 23:39:57,453 INFO L231 Difference]: Finished difference. Result has 148 places, 203 transitions, 2766 flow [2024-06-27 23:39:57,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2766, PETRI_PLACES=148, PETRI_TRANSITIONS=203} [2024-06-27 23:39:57,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-27 23:39:57,454 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 203 transitions, 2766 flow [2024-06-27 23:39:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:57,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:57,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:39:57,455 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash -486458166, now seen corresponding path program 2 times [2024-06-27 23:39:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21247512] [2024-06-27 23:39:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:59,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21247512] [2024-06-27 23:39:59,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21247512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:59,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:59,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750842660] [2024-06-27 23:39:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:59,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:59,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:39:59,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 203 transitions, 2766 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:59,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:59,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:39:59,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:00,263 INFO L124 PetriNetUnfolderBase]: 3107/5143 cut-off events. [2024-06-27 23:40:00,264 INFO L125 PetriNetUnfolderBase]: For 90644/90650 co-relation queries the response was YES. [2024-06-27 23:40:00,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27812 conditions, 5143 events. 3107/5143 cut-off events. For 90644/90650 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33069 event pairs, 1294 based on Foata normal form. 6/5142 useless extension candidates. Maximal degree in co-relation 27746. Up to 4639 conditions per place. [2024-06-27 23:40:00,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 52 changer transitions 0/237 dead transitions. [2024-06-27 23:40:00,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 3430 flow [2024-06-27 23:40:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:40:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:40:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:40:00,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 23:40:00,299 INFO L175 Difference]: Start difference. First operand has 148 places, 203 transitions, 2766 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:40:00,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 3430 flow [2024-06-27 23:40:00,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 237 transitions, 3145 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 23:40:00,405 INFO L231 Difference]: Finished difference. Result has 150 places, 213 transitions, 2720 flow [2024-06-27 23:40:00,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2720, PETRI_PLACES=150, PETRI_TRANSITIONS=213} [2024-06-27 23:40:00,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 23:40:00,406 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 213 transitions, 2720 flow [2024-06-27 23:40:00,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:00,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:00,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:00,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:40:00,407 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)] === [2024-06-27 23:40:00,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash 858444132, now seen corresponding path program 2 times [2024-06-27 23:40:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:00,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227747689] [2024-06-27 23:40:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:00,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:01,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227747689] [2024-06-27 23:40:01,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227747689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:01,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:01,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:40:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519473677] [2024-06-27 23:40:01,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:40:01,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:40:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:40:01,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:40:01,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 213 transitions, 2720 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:01,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:01,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:40:01,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:02,216 INFO L124 PetriNetUnfolderBase]: 2992/5022 cut-off events. [2024-06-27 23:40:02,216 INFO L125 PetriNetUnfolderBase]: For 91671/91675 co-relation queries the response was YES. [2024-06-27 23:40:02,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27486 conditions, 5022 events. 2992/5022 cut-off events. For 91671/91675 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32823 event pairs, 1049 based on Foata normal form. 5/4998 useless extension candidates. Maximal degree in co-relation 27419. Up to 4518 conditions per place. [2024-06-27 23:40:02,253 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 166 selfloop transitions, 39 changer transitions 0/230 dead transitions. [2024-06-27 23:40:02,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 230 transitions, 3210 flow [2024-06-27 23:40:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 23:40:02,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 23:40:02,261 INFO L175 Difference]: Start difference. First operand has 150 places, 213 transitions, 2720 flow. Second operand 7 states and 135 transitions. [2024-06-27 23:40:02,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 230 transitions, 3210 flow [2024-06-27 23:40:02,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 230 transitions, 3030 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 23:40:02,376 INFO L231 Difference]: Finished difference. Result has 149 places, 219 transitions, 2683 flow [2024-06-27 23:40:02,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2683, PETRI_PLACES=149, PETRI_TRANSITIONS=219} [2024-06-27 23:40:02,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 23:40:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 219 transitions, 2683 flow [2024-06-27 23:40:02,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:02,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:02,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:02,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:40:02,379 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:02,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash 293699472, now seen corresponding path program 10 times [2024-06-27 23:40:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:02,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417633951] [2024-06-27 23:40:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:02,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417633951] [2024-06-27 23:40:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417633951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:03,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:03,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558006442] [2024-06-27 23:40:03,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:03,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:03,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:04,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:04,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 219 transitions, 2683 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:04,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:04,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:04,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:05,219 INFO L124 PetriNetUnfolderBase]: 3152/5201 cut-off events. [2024-06-27 23:40:05,220 INFO L125 PetriNetUnfolderBase]: For 99952/99952 co-relation queries the response was YES. [2024-06-27 23:40:05,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28793 conditions, 5201 events. 3152/5201 cut-off events. For 99952/99952 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33127 event pairs, 901 based on Foata normal form. 20/5208 useless extension candidates. Maximal degree in co-relation 28726. Up to 4370 conditions per place. [2024-06-27 23:40:05,259 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 98 changer transitions 0/250 dead transitions. [2024-06-27 23:40:05,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 250 transitions, 3352 flow [2024-06-27 23:40:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:40:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:40:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:40:05,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 23:40:05,260 INFO L175 Difference]: Start difference. First operand has 149 places, 219 transitions, 2683 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:40:05,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 250 transitions, 3352 flow [2024-06-27 23:40:05,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 250 transitions, 3269 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:05,383 INFO L231 Difference]: Finished difference. Result has 153 places, 220 transitions, 2833 flow [2024-06-27 23:40:05,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2833, PETRI_PLACES=153, PETRI_TRANSITIONS=220} [2024-06-27 23:40:05,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 23:40:05,384 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 220 transitions, 2833 flow [2024-06-27 23:40:05,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:05,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:05,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:40:05,384 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:05,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash -320819032, now seen corresponding path program 3 times [2024-06-27 23:40:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636094764] [2024-06-27 23:40:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:06,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:06,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636094764] [2024-06-27 23:40:06,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636094764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:06,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:06,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:06,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264127462] [2024-06-27 23:40:06,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:06,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:07,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:07,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 220 transitions, 2833 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:07,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:07,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:07,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:08,277 INFO L124 PetriNetUnfolderBase]: 3187/5283 cut-off events. [2024-06-27 23:40:08,277 INFO L125 PetriNetUnfolderBase]: For 104063/104069 co-relation queries the response was YES. [2024-06-27 23:40:08,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29643 conditions, 5283 events. 3187/5283 cut-off events. For 104063/104069 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34157 event pairs, 1303 based on Foata normal form. 8/5284 useless extension candidates. Maximal degree in co-relation 29575. Up to 4771 conditions per place. [2024-06-27 23:40:08,314 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 56 changer transitions 0/252 dead transitions. [2024-06-27 23:40:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 252 transitions, 3540 flow [2024-06-27 23:40:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:40:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:40:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:40:08,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:40:08,316 INFO L175 Difference]: Start difference. First operand has 153 places, 220 transitions, 2833 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:40:08,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 252 transitions, 3540 flow [2024-06-27 23:40:08,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 252 transitions, 3223 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 23:40:08,424 INFO L231 Difference]: Finished difference. Result has 154 places, 229 transitions, 2764 flow [2024-06-27 23:40:08,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2764, PETRI_PLACES=154, PETRI_TRANSITIONS=229} [2024-06-27 23:40:08,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 23:40:08,425 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 229 transitions, 2764 flow [2024-06-27 23:40:08,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:08,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:08,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:40:08,426 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:08,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1825583926, now seen corresponding path program 4 times [2024-06-27 23:40:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:08,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9027915] [2024-06-27 23:40:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:08,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9027915] [2024-06-27 23:40:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9027915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:09,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:09,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185193496] [2024-06-27 23:40:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:09,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:09,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:09,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 229 transitions, 2764 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:09,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:09,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:09,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:10,950 INFO L124 PetriNetUnfolderBase]: 3204/5322 cut-off events. [2024-06-27 23:40:10,950 INFO L125 PetriNetUnfolderBase]: For 108355/108361 co-relation queries the response was YES. [2024-06-27 23:40:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29918 conditions, 5322 events. 3204/5322 cut-off events. For 108355/108361 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34491 event pairs, 1318 based on Foata normal form. 8/5323 useless extension candidates. Maximal degree in co-relation 29850. Up to 4798 conditions per place. [2024-06-27 23:40:10,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 63 changer transitions 0/259 dead transitions. [2024-06-27 23:40:10,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 259 transitions, 3471 flow [2024-06-27 23:40:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:40:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:40:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:40:10,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:40:10,996 INFO L175 Difference]: Start difference. First operand has 154 places, 229 transitions, 2764 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:40:10,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 259 transitions, 3471 flow [2024-06-27 23:40:11,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 259 transitions, 3319 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:11,124 INFO L231 Difference]: Finished difference. Result has 157 places, 235 transitions, 2837 flow [2024-06-27 23:40:11,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2837, PETRI_PLACES=157, PETRI_TRANSITIONS=235} [2024-06-27 23:40:11,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 23:40:11,125 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 235 transitions, 2837 flow [2024-06-27 23:40:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:11,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:11,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:40:11,125 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:11,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 530356200, now seen corresponding path program 5 times [2024-06-27 23:40:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:11,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28696825] [2024-06-27 23:40:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:12,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28696825] [2024-06-27 23:40:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28696825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:12,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:12,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655436341] [2024-06-27 23:40:12,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:12,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:12,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 235 transitions, 2837 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:12,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:12,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:13,889 INFO L124 PetriNetUnfolderBase]: 3194/5294 cut-off events. [2024-06-27 23:40:13,890 INFO L125 PetriNetUnfolderBase]: For 112664/112670 co-relation queries the response was YES. [2024-06-27 23:40:13,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29977 conditions, 5294 events. 3194/5294 cut-off events. For 112664/112670 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34221 event pairs, 1235 based on Foata normal form. 8/5286 useless extension candidates. Maximal degree in co-relation 29908. Up to 4673 conditions per place. [2024-06-27 23:40:13,930 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 74 changer transitions 0/262 dead transitions. [2024-06-27 23:40:13,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 262 transitions, 3511 flow [2024-06-27 23:40:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:40:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:40:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:40:13,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:40:13,942 INFO L175 Difference]: Start difference. First operand has 157 places, 235 transitions, 2837 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:40:13,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 262 transitions, 3511 flow [2024-06-27 23:40:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 262 transitions, 3382 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:14,086 INFO L231 Difference]: Finished difference. Result has 161 places, 237 transitions, 2911 flow [2024-06-27 23:40:14,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2911, PETRI_PLACES=161, PETRI_TRANSITIONS=237} [2024-06-27 23:40:14,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 23:40:14,087 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 237 transitions, 2911 flow [2024-06-27 23:40:14,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:14,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:14,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:14,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:40:14,088 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:14,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1383969530, now seen corresponding path program 3 times [2024-06-27 23:40:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:14,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701173214] [2024-06-27 23:40:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:15,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:15,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701173214] [2024-06-27 23:40:15,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701173214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:15,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:15,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:40:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191820413] [2024-06-27 23:40:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:15,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:40:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:40:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:40:15,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:40:15,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 237 transitions, 2911 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:15,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:15,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:40:15,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:15,968 INFO L124 PetriNetUnfolderBase]: 3064/5134 cut-off events. [2024-06-27 23:40:15,969 INFO L125 PetriNetUnfolderBase]: For 115110/115115 co-relation queries the response was YES. [2024-06-27 23:40:15,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29322 conditions, 5134 events. 3064/5134 cut-off events. For 115110/115115 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33535 event pairs, 1033 based on Foata normal form. 6/5102 useless extension candidates. Maximal degree in co-relation 29252. Up to 4607 conditions per place. [2024-06-27 23:40:16,010 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 47 changer transitions 0/248 dead transitions. [2024-06-27 23:40:16,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 248 transitions, 3407 flow [2024-06-27 23:40:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:40:16,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 23:40:16,012 INFO L175 Difference]: Start difference. First operand has 161 places, 237 transitions, 2911 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:40:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 248 transitions, 3407 flow [2024-06-27 23:40:16,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 3222 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:40:16,200 INFO L231 Difference]: Finished difference. Result has 161 places, 240 transitions, 2866 flow [2024-06-27 23:40:16,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2866, PETRI_PLACES=161, PETRI_TRANSITIONS=240} [2024-06-27 23:40:16,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 23:40:16,200 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 240 transitions, 2866 flow [2024-06-27 23:40:16,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:16,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:16,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:40:16,201 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:16,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1926147558, now seen corresponding path program 1 times [2024-06-27 23:40:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:16,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966539495] [2024-06-27 23:40:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:16,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966539495] [2024-06-27 23:40:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966539495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:17,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:40:17,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368811658] [2024-06-27 23:40:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:40:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:40:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:40:17,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:40:17,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 240 transitions, 2866 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:17,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:17,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:40:17,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:18,065 INFO L124 PetriNetUnfolderBase]: 3030/5100 cut-off events. [2024-06-27 23:40:18,065 INFO L125 PetriNetUnfolderBase]: For 108096/108096 co-relation queries the response was YES. [2024-06-27 23:40:18,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28913 conditions, 5100 events. 3030/5100 cut-off events. For 108096/108096 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33441 event pairs, 1481 based on Foata normal form. 2/5100 useless extension candidates. Maximal degree in co-relation 28842. Up to 4673 conditions per place. [2024-06-27 23:40:18,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 16 changer transitions 0/255 dead transitions. [2024-06-27 23:40:18,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3448 flow [2024-06-27 23:40:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:40:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:40:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 23:40:18,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 23:40:18,102 INFO L175 Difference]: Start difference. First operand has 161 places, 240 transitions, 2866 flow. Second operand 6 states and 122 transitions. [2024-06-27 23:40:18,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3448 flow [2024-06-27 23:40:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 255 transitions, 3330 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:18,312 INFO L231 Difference]: Finished difference. Result has 162 places, 244 transitions, 2836 flow [2024-06-27 23:40:18,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2836, PETRI_PLACES=162, PETRI_TRANSITIONS=244} [2024-06-27 23:40:18,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 23:40:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 244 transitions, 2836 flow [2024-06-27 23:40:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:18,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:18,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:40:18,314 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:18,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1925997828, now seen corresponding path program 2 times [2024-06-27 23:40:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:18,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189084425] [2024-06-27 23:40:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:19,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:19,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189084425] [2024-06-27 23:40:19,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189084425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:19,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:19,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:40:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116721702] [2024-06-27 23:40:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:40:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:40:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:40:19,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:40:19,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 244 transitions, 2836 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:19,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:19,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:40:19,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:20,163 INFO L124 PetriNetUnfolderBase]: 3027/5104 cut-off events. [2024-06-27 23:40:20,164 INFO L125 PetriNetUnfolderBase]: For 113524/113527 co-relation queries the response was YES. [2024-06-27 23:40:20,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29635 conditions, 5104 events. 3027/5104 cut-off events. For 113524/113527 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33552 event pairs, 1500 based on Foata normal form. 1/5101 useless extension candidates. Maximal degree in co-relation 29563. Up to 4663 conditions per place. [2024-06-27 23:40:20,206 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 21 changer transitions 0/255 dead transitions. [2024-06-27 23:40:20,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 255 transitions, 3398 flow [2024-06-27 23:40:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 23:40:20,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:40:20,209 INFO L175 Difference]: Start difference. First operand has 162 places, 244 transitions, 2836 flow. Second operand 7 states and 133 transitions. [2024-06-27 23:40:20,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 255 transitions, 3398 flow [2024-06-27 23:40:20,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 255 transitions, 3340 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:40:20,421 INFO L231 Difference]: Finished difference. Result has 165 places, 247 transitions, 2870 flow [2024-06-27 23:40:20,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2870, PETRI_PLACES=165, PETRI_TRANSITIONS=247} [2024-06-27 23:40:20,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 23:40:20,421 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 247 transitions, 2870 flow [2024-06-27 23:40:20,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:20,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:20,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:20,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:40:20,422 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:20,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:20,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1383955642, now seen corresponding path program 1 times [2024-06-27 23:40:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:20,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650546139] [2024-06-27 23:40:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:20,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650546139] [2024-06-27 23:40:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650546139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:21,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:21,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688832474] [2024-06-27 23:40:21,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:21,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:21,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:21,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:21,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 247 transitions, 2870 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:21,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:21,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:22,618 INFO L124 PetriNetUnfolderBase]: 3135/5217 cut-off events. [2024-06-27 23:40:22,618 INFO L125 PetriNetUnfolderBase]: For 137985/137998 co-relation queries the response was YES. [2024-06-27 23:40:22,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31584 conditions, 5217 events. 3135/5217 cut-off events. For 137985/137998 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34266 event pairs, 1605 based on Foata normal form. 4/5197 useless extension candidates. Maximal degree in co-relation 31511. Up to 4825 conditions per place. [2024-06-27 23:40:22,660 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 16 changer transitions 0/259 dead transitions. [2024-06-27 23:40:22,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 259 transitions, 3396 flow [2024-06-27 23:40:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:40:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:40:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 23:40:22,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 23:40:22,661 INFO L175 Difference]: Start difference. First operand has 165 places, 247 transitions, 2870 flow. Second operand 8 states and 138 transitions. [2024-06-27 23:40:22,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 259 transitions, 3396 flow [2024-06-27 23:40:22,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 259 transitions, 3326 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:22,852 INFO L231 Difference]: Finished difference. Result has 168 places, 250 transitions, 2880 flow [2024-06-27 23:40:22,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2880, PETRI_PLACES=168, PETRI_TRANSITIONS=250} [2024-06-27 23:40:22,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-27 23:40:22,853 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 250 transitions, 2880 flow [2024-06-27 23:40:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:22,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:22,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:40:22,853 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:22,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1704124516, now seen corresponding path program 1 times [2024-06-27 23:40:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320541530] [2024-06-27 23:40:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:24,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:24,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320541530] [2024-06-27 23:40:24,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320541530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:24,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:24,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:24,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967489151] [2024-06-27 23:40:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:24,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:24,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 250 transitions, 2880 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:24,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:24,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:24,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:25,914 INFO L124 PetriNetUnfolderBase]: 3520/5901 cut-off events. [2024-06-27 23:40:25,914 INFO L125 PetriNetUnfolderBase]: For 152054/152057 co-relation queries the response was YES. [2024-06-27 23:40:25,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35287 conditions, 5901 events. 3520/5901 cut-off events. For 152054/152057 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 39433 event pairs, 1007 based on Foata normal form. 12/5909 useless extension candidates. Maximal degree in co-relation 35213. Up to 4420 conditions per place. [2024-06-27 23:40:25,966 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 178 selfloop transitions, 137 changer transitions 0/322 dead transitions. [2024-06-27 23:40:25,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 322 transitions, 4172 flow [2024-06-27 23:40:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 23:40:25,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-27 23:40:25,968 INFO L175 Difference]: Start difference. First operand has 168 places, 250 transitions, 2880 flow. Second operand 10 states and 208 transitions. [2024-06-27 23:40:25,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 322 transitions, 4172 flow [2024-06-27 23:40:26,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 322 transitions, 4114 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:26,183 INFO L231 Difference]: Finished difference. Result has 174 places, 277 transitions, 3599 flow [2024-06-27 23:40:26,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3599, PETRI_PLACES=174, PETRI_TRANSITIONS=277} [2024-06-27 23:40:26,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 23:40:26,183 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 277 transitions, 3599 flow [2024-06-27 23:40:26,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:26,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:26,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:40:26,184 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:26,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1173467902, now seen corresponding path program 1 times [2024-06-27 23:40:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900611604] [2024-06-27 23:40:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:26,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:27,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900611604] [2024-06-27 23:40:27,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900611604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:27,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:27,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:27,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546933292] [2024-06-27 23:40:27,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:27,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:27,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:27,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:27,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:27,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 277 transitions, 3599 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:27,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:27,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:27,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:28,340 INFO L124 PetriNetUnfolderBase]: 3474/5846 cut-off events. [2024-06-27 23:40:28,341 INFO L125 PetriNetUnfolderBase]: For 159767/159770 co-relation queries the response was YES. [2024-06-27 23:40:28,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36433 conditions, 5846 events. 3474/5846 cut-off events. For 159767/159770 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39385 event pairs, 1105 based on Foata normal form. 5/5825 useless extension candidates. Maximal degree in co-relation 36356. Up to 5317 conditions per place. [2024-06-27 23:40:28,391 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 44 changer transitions 0/298 dead transitions. [2024-06-27 23:40:28,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 298 transitions, 4239 flow [2024-06-27 23:40:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:40:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:40:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:40:28,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:40:28,392 INFO L175 Difference]: Start difference. First operand has 174 places, 277 transitions, 3599 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:40:28,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 298 transitions, 4239 flow [2024-06-27 23:40:28,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 298 transitions, 4022 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:28,645 INFO L231 Difference]: Finished difference. Result has 177 places, 280 transitions, 3519 flow [2024-06-27 23:40:28,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3519, PETRI_PLACES=177, PETRI_TRANSITIONS=280} [2024-06-27 23:40:28,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 23:40:28,647 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 280 transitions, 3519 flow [2024-06-27 23:40:28,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:28,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:28,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:28,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:40:28,648 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:28,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash 283916050, now seen corresponding path program 2 times [2024-06-27 23:40:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:28,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097343024] [2024-06-27 23:40:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:30,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097343024] [2024-06-27 23:40:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097343024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:30,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:30,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:30,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546854806] [2024-06-27 23:40:30,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:30,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:30,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:30,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:30,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 280 transitions, 3519 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:30,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:30,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:30,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:31,825 INFO L124 PetriNetUnfolderBase]: 3744/6328 cut-off events. [2024-06-27 23:40:31,825 INFO L125 PetriNetUnfolderBase]: For 172756/172759 co-relation queries the response was YES. [2024-06-27 23:40:31,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38668 conditions, 6328 events. 3744/6328 cut-off events. For 172756/172759 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43276 event pairs, 1130 based on Foata normal form. 12/6326 useless extension candidates. Maximal degree in co-relation 38590. Up to 4890 conditions per place. [2024-06-27 23:40:31,883 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 138 changer transitions 0/334 dead transitions. [2024-06-27 23:40:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 334 transitions, 4614 flow [2024-06-27 23:40:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 23:40:31,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:40:31,885 INFO L175 Difference]: Start difference. First operand has 177 places, 280 transitions, 3519 flow. Second operand 10 states and 200 transitions. [2024-06-27 23:40:31,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 334 transitions, 4614 flow [2024-06-27 23:40:32,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 334 transitions, 4501 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:32,149 INFO L231 Difference]: Finished difference. Result has 183 places, 296 transitions, 3985 flow [2024-06-27 23:40:32,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3985, PETRI_PLACES=183, PETRI_TRANSITIONS=296} [2024-06-27 23:40:32,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 23:40:32,149 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 296 transitions, 3985 flow [2024-06-27 23:40:32,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:32,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:32,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:32,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:40:32,150 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)] === [2024-06-27 23:40:32,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1414267702, now seen corresponding path program 2 times [2024-06-27 23:40:32,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:32,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929062077] [2024-06-27 23:40:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:32,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:33,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:33,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929062077] [2024-06-27 23:40:33,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929062077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:33,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:33,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:33,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205125549] [2024-06-27 23:40:33,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:33,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:33,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:33,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:33,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 296 transitions, 3985 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:33,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:33,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:33,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:34,305 INFO L124 PetriNetUnfolderBase]: 3677/6220 cut-off events. [2024-06-27 23:40:34,306 INFO L125 PetriNetUnfolderBase]: For 181040/181056 co-relation queries the response was YES. [2024-06-27 23:40:34,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 6220 events. 3677/6220 cut-off events. For 181040/181056 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 42689 event pairs, 1179 based on Foata normal form. 5/6177 useless extension candidates. Maximal degree in co-relation 39314. Up to 5664 conditions per place. [2024-06-27 23:40:34,364 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 45 changer transitions 0/314 dead transitions. [2024-06-27 23:40:34,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 314 transitions, 4649 flow [2024-06-27 23:40:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:40:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:40:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:40:34,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:40:34,366 INFO L175 Difference]: Start difference. First operand has 183 places, 296 transitions, 3985 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:40:34,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 314 transitions, 4649 flow [2024-06-27 23:40:34,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 314 transitions, 4426 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:34,706 INFO L231 Difference]: Finished difference. Result has 186 places, 302 transitions, 3928 flow [2024-06-27 23:40:34,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3928, PETRI_PLACES=186, PETRI_TRANSITIONS=302} [2024-06-27 23:40:34,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 23:40:34,707 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 302 transitions, 3928 flow [2024-06-27 23:40:34,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:34,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:34,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:34,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:40:34,708 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:34,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash -815140726, now seen corresponding path program 3 times [2024-06-27 23:40:34,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:34,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198285274] [2024-06-27 23:40:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:34,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:36,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:36,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198285274] [2024-06-27 23:40:36,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198285274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:36,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:36,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239085960] [2024-06-27 23:40:36,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:36,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:36,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:36,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:36,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:36,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 302 transitions, 3928 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:36,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:36,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:36,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:38,064 INFO L124 PetriNetUnfolderBase]: 3881/6571 cut-off events. [2024-06-27 23:40:38,064 INFO L125 PetriNetUnfolderBase]: For 193309/193309 co-relation queries the response was YES. [2024-06-27 23:40:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41184 conditions, 6571 events. 3881/6571 cut-off events. For 193309/193309 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 45387 event pairs, 1118 based on Foata normal form. 12/6570 useless extension candidates. Maximal degree in co-relation 41102. Up to 5494 conditions per place. [2024-06-27 23:40:38,125 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 147 changer transitions 0/353 dead transitions. [2024-06-27 23:40:38,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 353 transitions, 4986 flow [2024-06-27 23:40:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:40:38,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 23:40:38,127 INFO L175 Difference]: Start difference. First operand has 186 places, 302 transitions, 3928 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:40:38,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 353 transitions, 4986 flow [2024-06-27 23:40:38,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 353 transitions, 4874 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:38,456 INFO L231 Difference]: Finished difference. Result has 192 places, 315 transitions, 4330 flow [2024-06-27 23:40:38,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3816, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4330, PETRI_PLACES=192, PETRI_TRANSITIONS=315} [2024-06-27 23:40:38,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 23:40:38,457 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 315 transitions, 4330 flow [2024-06-27 23:40:38,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:38,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:38,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:38,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:40:38,458 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:38,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash -749328590, now seen corresponding path program 4 times [2024-06-27 23:40:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:38,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903937572] [2024-06-27 23:40:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:40,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:40,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903937572] [2024-06-27 23:40:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903937572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:40,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:40,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916161411] [2024-06-27 23:40:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:40,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:40,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:40,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 315 transitions, 4330 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:40,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:40,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:40,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:42,011 INFO L124 PetriNetUnfolderBase]: 3967/6729 cut-off events. [2024-06-27 23:40:42,012 INFO L125 PetriNetUnfolderBase]: For 210131/210139 co-relation queries the response was YES. [2024-06-27 23:40:42,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43126 conditions, 6729 events. 3967/6729 cut-off events. For 210131/210139 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46636 event pairs, 1084 based on Foata normal form. 12/6726 useless extension candidates. Maximal degree in co-relation 43041. Up to 4226 conditions per place. [2024-06-27 23:40:42,072 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 175 selfloop transitions, 172 changer transitions 0/357 dead transitions. [2024-06-27 23:40:42,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 357 transitions, 5387 flow [2024-06-27 23:40:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:40:42,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 23:40:42,074 INFO L175 Difference]: Start difference. First operand has 192 places, 315 transitions, 4330 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:40:42,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 357 transitions, 5387 flow [2024-06-27 23:40:42,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 357 transitions, 5189 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 23:40:42,554 INFO L231 Difference]: Finished difference. Result has 199 places, 317 transitions, 4606 flow [2024-06-27 23:40:42,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4606, PETRI_PLACES=199, PETRI_TRANSITIONS=317} [2024-06-27 23:40:42,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 23:40:42,556 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 317 transitions, 4606 flow [2024-06-27 23:40:42,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:42,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:42,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:40:42,557 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:42,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:42,557 INFO L85 PathProgramCache]: Analyzing trace with hash 509973072, now seen corresponding path program 5 times [2024-06-27 23:40:42,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:42,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107111076] [2024-06-27 23:40:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:44,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:44,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107111076] [2024-06-27 23:40:44,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107111076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:44,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:44,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484645385] [2024-06-27 23:40:44,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:44,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:44,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:44,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:44,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 317 transitions, 4606 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:44,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:44,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:44,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:45,783 INFO L124 PetriNetUnfolderBase]: 3943/6697 cut-off events. [2024-06-27 23:40:45,783 INFO L125 PetriNetUnfolderBase]: For 202171/202171 co-relation queries the response was YES. [2024-06-27 23:40:45,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41830 conditions, 6697 events. 3943/6697 cut-off events. For 202171/202171 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46588 event pairs, 1147 based on Foata normal form. 12/6696 useless extension candidates. Maximal degree in co-relation 41743. Up to 5604 conditions per place. [2024-06-27 23:40:45,841 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 200 selfloop transitions, 141 changer transitions 0/351 dead transitions. [2024-06-27 23:40:45,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 351 transitions, 5420 flow [2024-06-27 23:40:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:40:45,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 23:40:45,843 INFO L175 Difference]: Start difference. First operand has 199 places, 317 transitions, 4606 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:40:45,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 351 transitions, 5420 flow [2024-06-27 23:40:46,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 351 transitions, 5104 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 23:40:46,246 INFO L231 Difference]: Finished difference. Result has 201 places, 316 transitions, 4514 flow [2024-06-27 23:40:46,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4228, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4514, PETRI_PLACES=201, PETRI_TRANSITIONS=316} [2024-06-27 23:40:46,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-27 23:40:46,246 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 316 transitions, 4514 flow [2024-06-27 23:40:46,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:46,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:46,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:46,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:40:46,247 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:46,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1768530742, now seen corresponding path program 3 times [2024-06-27 23:40:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:46,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152162596] [2024-06-27 23:40:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:47,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:47,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152162596] [2024-06-27 23:40:47,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152162596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:47,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:47,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:47,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253337182] [2024-06-27 23:40:47,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:47,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:47,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:47,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:47,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:47,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 316 transitions, 4514 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:47,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:47,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:47,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:48,494 INFO L124 PetriNetUnfolderBase]: 3831/6514 cut-off events. [2024-06-27 23:40:48,495 INFO L125 PetriNetUnfolderBase]: For 199608/199625 co-relation queries the response was YES. [2024-06-27 23:40:48,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40642 conditions, 6514 events. 3831/6514 cut-off events. For 199608/199625 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45498 event pairs, 1216 based on Foata normal form. 9/6461 useless extension candidates. Maximal degree in co-relation 40554. Up to 5901 conditions per place. [2024-06-27 23:40:48,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 61 changer transitions 0/332 dead transitions. [2024-06-27 23:40:48,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 332 transitions, 5330 flow [2024-06-27 23:40:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:40:48,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 23:40:48,558 INFO L175 Difference]: Start difference. First operand has 201 places, 316 transitions, 4514 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:40:48,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 332 transitions, 5330 flow [2024-06-27 23:40:48,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 332 transitions, 4833 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 23:40:48,907 INFO L231 Difference]: Finished difference. Result has 198 places, 322 transitions, 4247 flow [2024-06-27 23:40:48,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4247, PETRI_PLACES=198, PETRI_TRANSITIONS=322} [2024-06-27 23:40:48,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 23:40:48,908 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 322 transitions, 4247 flow [2024-06-27 23:40:48,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:48,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:48,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:48,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:40:48,909 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:48,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:48,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1280687018, now seen corresponding path program 4 times [2024-06-27 23:40:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:48,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510058769] [2024-06-27 23:40:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510058769] [2024-06-27 23:40:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510058769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609402795] [2024-06-27 23:40:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:50,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:40:50,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 322 transitions, 4247 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:50,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:50,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:40:50,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:51,405 INFO L124 PetriNetUnfolderBase]: 3825/6506 cut-off events. [2024-06-27 23:40:51,405 INFO L125 PetriNetUnfolderBase]: For 200895/200908 co-relation queries the response was YES. [2024-06-27 23:40:51,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39742 conditions, 6506 events. 3825/6506 cut-off events. For 200895/200908 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45437 event pairs, 1215 based on Foata normal form. 14/6458 useless extension candidates. Maximal degree in co-relation 39656. Up to 5896 conditions per place. [2024-06-27 23:40:51,459 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 64 changer transitions 0/331 dead transitions. [2024-06-27 23:40:51,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 331 transitions, 4881 flow [2024-06-27 23:40:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:40:51,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 23:40:51,461 INFO L175 Difference]: Start difference. First operand has 198 places, 322 transitions, 4247 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:40:51,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 331 transitions, 4881 flow [2024-06-27 23:40:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 331 transitions, 4735 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 23:40:51,738 INFO L231 Difference]: Finished difference. Result has 202 places, 322 transitions, 4235 flow [2024-06-27 23:40:51,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4235, PETRI_PLACES=202, PETRI_TRANSITIONS=322} [2024-06-27 23:40:51,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 23:40:51,739 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 322 transitions, 4235 flow [2024-06-27 23:40:51,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:51,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:51,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:40:51,740 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:51,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 418969290, now seen corresponding path program 1 times [2024-06-27 23:40:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:51,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771361493] [2024-06-27 23:40:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771361493] [2024-06-27 23:40:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771361493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:53,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:53,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954151853] [2024-06-27 23:40:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:53,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:40:53,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 322 transitions, 4235 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-27 23:40:53,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:53,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:40:53,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:54,443 INFO L124 PetriNetUnfolderBase]: 3865/6625 cut-off events. [2024-06-27 23:40:54,444 INFO L125 PetriNetUnfolderBase]: For 210198/210198 co-relation queries the response was YES. [2024-06-27 23:40:54,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40576 conditions, 6625 events. 3865/6625 cut-off events. For 210198/210198 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46718 event pairs, 1833 based on Foata normal form. 1/6624 useless extension candidates. Maximal degree in co-relation 40488. Up to 6006 conditions per place. [2024-06-27 23:40:54,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 19 changer transitions 0/337 dead transitions. [2024-06-27 23:40:54,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 337 transitions, 4973 flow [2024-06-27 23:40:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:40:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:40:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:40:54,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:40:54,524 INFO L175 Difference]: Start difference. First operand has 202 places, 322 transitions, 4235 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:40:54,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 337 transitions, 4973 flow [2024-06-27 23:40:54,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 337 transitions, 4837 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:54,898 INFO L231 Difference]: Finished difference. Result has 204 places, 325 transitions, 4191 flow [2024-06-27 23:40:54,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4099, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=204, PETRI_TRANSITIONS=325} [2024-06-27 23:40:54,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 23:40:54,898 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 325 transitions, 4191 flow [2024-06-27 23:40:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-27 23:40:54,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:54,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:54,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:40:54,899 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:54,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash 418969476, now seen corresponding path program 1 times [2024-06-27 23:40:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:54,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955060992] [2024-06-27 23:40:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:54,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:55,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:55,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955060992] [2024-06-27 23:40:55,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955060992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:55,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:55,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:55,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726897263] [2024-06-27 23:40:55,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:55,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:56,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:40:56,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 325 transitions, 4191 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:56,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:56,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:40:56,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:57,245 INFO L124 PetriNetUnfolderBase]: 4037/6801 cut-off events. [2024-06-27 23:40:57,245 INFO L125 PetriNetUnfolderBase]: For 218155/218155 co-relation queries the response was YES. [2024-06-27 23:40:57,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42118 conditions, 6801 events. 4037/6801 cut-off events. For 218155/218155 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 47131 event pairs, 1927 based on Foata normal form. 2/6801 useless extension candidates. Maximal degree in co-relation 42029. Up to 6339 conditions per place. [2024-06-27 23:40:57,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 20 changer transitions 0/341 dead transitions. [2024-06-27 23:40:57,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 341 transitions, 4965 flow [2024-06-27 23:40:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:40:57,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:40:57,305 INFO L175 Difference]: Start difference. First operand has 204 places, 325 transitions, 4191 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:40:57,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 341 transitions, 4965 flow [2024-06-27 23:40:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 341 transitions, 4895 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:57,718 INFO L231 Difference]: Finished difference. Result has 205 places, 329 transitions, 4228 flow [2024-06-27 23:40:57,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4228, PETRI_PLACES=205, PETRI_TRANSITIONS=329} [2024-06-27 23:40:57,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 23:40:57,718 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 329 transitions, 4228 flow [2024-06-27 23:40:57,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:57,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:57,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:57,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:40:57,719 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:57,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash 423610920, now seen corresponding path program 2 times [2024-06-27 23:40:57,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:57,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770092753] [2024-06-27 23:40:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:57,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:59,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770092753] [2024-06-27 23:40:59,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770092753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:59,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:59,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:59,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321342714] [2024-06-27 23:40:59,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:59,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:59,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:59,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:40:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 329 transitions, 4228 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:40:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:00,415 INFO L124 PetriNetUnfolderBase]: 3892/6655 cut-off events. [2024-06-27 23:41:00,416 INFO L125 PetriNetUnfolderBase]: For 228545/228548 co-relation queries the response was YES. [2024-06-27 23:41:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42296 conditions, 6655 events. 3892/6655 cut-off events. For 228545/228548 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46867 event pairs, 1847 based on Foata normal form. 1/6652 useless extension candidates. Maximal degree in co-relation 42206. Up to 6023 conditions per place. [2024-06-27 23:41:00,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 300 selfloop transitions, 26 changer transitions 0/341 dead transitions. [2024-06-27 23:41:00,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 341 transitions, 4964 flow [2024-06-27 23:41:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:41:00,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:41:00,584 INFO L175 Difference]: Start difference. First operand has 205 places, 329 transitions, 4228 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:41:00,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 341 transitions, 4964 flow [2024-06-27 23:41:00,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 341 transitions, 4885 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:41:00,994 INFO L231 Difference]: Finished difference. Result has 208 places, 332 transitions, 4265 flow [2024-06-27 23:41:00,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4265, PETRI_PLACES=208, PETRI_TRANSITIONS=332} [2024-06-27 23:41:00,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 23:41:00,995 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 332 transitions, 4265 flow [2024-06-27 23:41:00,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:00,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:00,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:00,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:41:00,995 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:00,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1768715254, now seen corresponding path program 2 times [2024-06-27 23:41:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:00,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76096120] [2024-06-27 23:41:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:02,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76096120] [2024-06-27 23:41:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76096120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810052263] [2024-06-27 23:41:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:02,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:02,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:02,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:02,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 332 transitions, 4265 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:02,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:02,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:02,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:03,297 INFO L124 PetriNetUnfolderBase]: 3954/6721 cut-off events. [2024-06-27 23:41:03,297 INFO L125 PetriNetUnfolderBase]: For 237784/237787 co-relation queries the response was YES. [2024-06-27 23:41:03,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43284 conditions, 6721 events. 3954/6721 cut-off events. For 237784/237787 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 47007 event pairs, 1887 based on Foata normal form. 1/6718 useless extension candidates. Maximal degree in co-relation 43193. Up to 6167 conditions per place. [2024-06-27 23:41:03,365 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 32 changer transitions 0/348 dead transitions. [2024-06-27 23:41:03,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 348 transitions, 5169 flow [2024-06-27 23:41:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:41:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:41:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 23:41:03,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:41:03,366 INFO L175 Difference]: Start difference. First operand has 208 places, 332 transitions, 4265 flow. Second operand 7 states and 133 transitions. [2024-06-27 23:41:03,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 348 transitions, 5169 flow [2024-06-27 23:41:03,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 348 transitions, 5075 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:41:03,869 INFO L231 Difference]: Finished difference. Result has 209 places, 338 transitions, 4343 flow [2024-06-27 23:41:03,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4171, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4343, PETRI_PLACES=209, PETRI_TRANSITIONS=338} [2024-06-27 23:41:03,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-27 23:41:03,873 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 338 transitions, 4343 flow [2024-06-27 23:41:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:03,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:03,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:03,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:41:03,873 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:03,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1768952404, now seen corresponding path program 3 times [2024-06-27 23:41:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:03,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916553974] [2024-06-27 23:41:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:03,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:05,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:05,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916553974] [2024-06-27 23:41:05,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916553974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:05,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:05,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:05,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527794755] [2024-06-27 23:41:05,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:05,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:05,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:05,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:05,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:05,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:05,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 338 transitions, 4343 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:05,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:05,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:05,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:06,229 INFO L124 PetriNetUnfolderBase]: 3951/6715 cut-off events. [2024-06-27 23:41:06,229 INFO L125 PetriNetUnfolderBase]: For 246450/246453 co-relation queries the response was YES. [2024-06-27 23:41:06,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43778 conditions, 6715 events. 3951/6715 cut-off events. For 246450/246453 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46945 event pairs, 1887 based on Foata normal form. 1/6712 useless extension candidates. Maximal degree in co-relation 43686. Up to 6164 conditions per place. [2024-06-27 23:41:06,299 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 33 changer transitions 0/347 dead transitions. [2024-06-27 23:41:06,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 347 transitions, 5055 flow [2024-06-27 23:41:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:41:06,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 23:41:06,300 INFO L175 Difference]: Start difference. First operand has 209 places, 338 transitions, 4343 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:41:06,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 347 transitions, 5055 flow [2024-06-27 23:41:06,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 347 transitions, 4947 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 23:41:06,869 INFO L231 Difference]: Finished difference. Result has 214 places, 338 transitions, 4307 flow [2024-06-27 23:41:06,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4307, PETRI_PLACES=214, PETRI_TRANSITIONS=338} [2024-06-27 23:41:06,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 23:41:06,870 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 338 transitions, 4307 flow [2024-06-27 23:41:06,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:06,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:06,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:06,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:41:06,870 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:06,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1768961332, now seen corresponding path program 1 times [2024-06-27 23:41:06,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:06,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963891061] [2024-06-27 23:41:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:06,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:08,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963891061] [2024-06-27 23:41:08,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963891061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:08,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:08,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:08,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589052737] [2024-06-27 23:41:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:08,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:08,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:08,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:08,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 338 transitions, 4307 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:08,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:08,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:08,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:09,597 INFO L124 PetriNetUnfolderBase]: 3822/6515 cut-off events. [2024-06-27 23:41:09,597 INFO L125 PetriNetUnfolderBase]: For 252352/252366 co-relation queries the response was YES. [2024-06-27 23:41:09,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42922 conditions, 6515 events. 3822/6515 cut-off events. For 252352/252366 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45899 event pairs, 1867 based on Foata normal form. 7/6476 useless extension candidates. Maximal degree in co-relation 42828. Up to 5991 conditions per place. [2024-06-27 23:41:09,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 302 selfloop transitions, 19 changer transitions 0/351 dead transitions. [2024-06-27 23:41:09,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 351 transitions, 5037 flow [2024-06-27 23:41:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:41:09,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 23:41:09,669 INFO L175 Difference]: Start difference. First operand has 214 places, 338 transitions, 4307 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:41:09,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 351 transitions, 5037 flow [2024-06-27 23:41:10,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 351 transitions, 4963 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:41:10,077 INFO L231 Difference]: Finished difference. Result has 215 places, 341 transitions, 4337 flow [2024-06-27 23:41:10,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4337, PETRI_PLACES=215, PETRI_TRANSITIONS=341} [2024-06-27 23:41:10,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 23:41:10,078 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 341 transitions, 4337 flow [2024-06-27 23:41:10,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:10,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:10,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:10,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:41:10,079 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:10,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:10,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1655836183, now seen corresponding path program 1 times [2024-06-27 23:41:10,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:10,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284800364] [2024-06-27 23:41:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:11,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:11,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284800364] [2024-06-27 23:41:11,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284800364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:11,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:11,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:11,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61741618] [2024-06-27 23:41:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:11,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:11,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:11,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 341 transitions, 4337 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:11,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:11,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:11,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:12,378 INFO L124 PetriNetUnfolderBase]: 3981/6758 cut-off events. [2024-06-27 23:41:12,379 INFO L125 PetriNetUnfolderBase]: For 262562/262567 co-relation queries the response was YES. [2024-06-27 23:41:12,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44537 conditions, 6758 events. 3981/6758 cut-off events. For 262562/262567 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 47322 event pairs, 1529 based on Foata normal form. 5/6760 useless extension candidates. Maximal degree in co-relation 44442. Up to 6151 conditions per place. [2024-06-27 23:41:12,436 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 41 changer transitions 0/368 dead transitions. [2024-06-27 23:41:12,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 368 transitions, 5208 flow [2024-06-27 23:41:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:41:12,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:41:12,437 INFO L175 Difference]: Start difference. First operand has 215 places, 341 transitions, 4337 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:41:12,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 368 transitions, 5208 flow [2024-06-27 23:41:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 368 transitions, 5126 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 23:41:12,918 INFO L231 Difference]: Finished difference. Result has 218 places, 347 transitions, 4446 flow [2024-06-27 23:41:12,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4255, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4446, PETRI_PLACES=218, PETRI_TRANSITIONS=347} [2024-06-27 23:41:12,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 23:41:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 347 transitions, 4446 flow [2024-06-27 23:41:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:12,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:12,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:41:12,920 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:12,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -514298715, now seen corresponding path program 2 times [2024-06-27 23:41:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560306613] [2024-06-27 23:41:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560306613] [2024-06-27 23:41:13,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560306613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:13,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:13,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129601] [2024-06-27 23:41:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:13,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:14,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:14,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 347 transitions, 4446 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:14,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:14,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:14,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:15,447 INFO L124 PetriNetUnfolderBase]: 4002/6787 cut-off events. [2024-06-27 23:41:15,447 INFO L125 PetriNetUnfolderBase]: For 275404/275409 co-relation queries the response was YES. [2024-06-27 23:41:15,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45585 conditions, 6787 events. 4002/6787 cut-off events. For 275404/275409 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 47509 event pairs, 1545 based on Foata normal form. 3/6786 useless extension candidates. Maximal degree in co-relation 45488. Up to 6089 conditions per place. [2024-06-27 23:41:15,523 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 71 changer transitions 0/377 dead transitions. [2024-06-27 23:41:15,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 377 transitions, 5492 flow [2024-06-27 23:41:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:41:15,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 23:41:15,524 INFO L175 Difference]: Start difference. First operand has 218 places, 347 transitions, 4446 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:41:15,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 377 transitions, 5492 flow [2024-06-27 23:41:16,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 377 transitions, 5401 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 23:41:16,138 INFO L231 Difference]: Finished difference. Result has 223 places, 358 transitions, 4694 flow [2024-06-27 23:41:16,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4694, PETRI_PLACES=223, PETRI_TRANSITIONS=358} [2024-06-27 23:41:16,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 23:41:16,139 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 358 transitions, 4694 flow [2024-06-27 23:41:16,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:16,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:16,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:16,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:41:16,140 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:16,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1428576569, now seen corresponding path program 1 times [2024-06-27 23:41:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347149638] [2024-06-27 23:41:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:17,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347149638] [2024-06-27 23:41:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347149638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:17,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224784994] [2024-06-27 23:41:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:17,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:17,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:17,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 358 transitions, 4694 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:17,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:17,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:17,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:18,690 INFO L124 PetriNetUnfolderBase]: 3878/6591 cut-off events. [2024-06-27 23:41:18,690 INFO L125 PetriNetUnfolderBase]: For 284016/284021 co-relation queries the response was YES. [2024-06-27 23:41:18,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45709 conditions, 6591 events. 3878/6591 cut-off events. For 284016/284021 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46011 event pairs, 1195 based on Foata normal form. 3/6555 useless extension candidates. Maximal degree in co-relation 45610. Up to 5961 conditions per place. [2024-06-27 23:41:18,759 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 293 selfloop transitions, 54 changer transitions 0/380 dead transitions. [2024-06-27 23:41:18,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 380 transitions, 5508 flow [2024-06-27 23:41:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:41:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:41:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:41:18,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:41:18,761 INFO L175 Difference]: Start difference. First operand has 223 places, 358 transitions, 4694 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:41:18,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 380 transitions, 5508 flow [2024-06-27 23:41:19,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 380 transitions, 5382 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:41:19,434 INFO L231 Difference]: Finished difference. Result has 228 places, 361 transitions, 4739 flow [2024-06-27 23:41:19,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4739, PETRI_PLACES=228, PETRI_TRANSITIONS=361} [2024-06-27 23:41:19,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 23:41:19,435 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 361 transitions, 4739 flow [2024-06-27 23:41:19,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:19,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:19,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:41:19,436 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 886905607, now seen corresponding path program 3 times [2024-06-27 23:41:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451066491] [2024-06-27 23:41:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451066491] [2024-06-27 23:41:20,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451066491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:20,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:20,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:20,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392175905] [2024-06-27 23:41:20,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:20,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:20,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:20,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:20,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:20,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 361 transitions, 4739 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:20,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:20,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:20,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:21,793 INFO L124 PetriNetUnfolderBase]: 4033/6831 cut-off events. [2024-06-27 23:41:21,793 INFO L125 PetriNetUnfolderBase]: For 302771/302777 co-relation queries the response was YES. [2024-06-27 23:41:21,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 6831 events. 4033/6831 cut-off events. For 302771/302777 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 47704 event pairs, 1540 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 47661. Up to 6151 conditions per place. [2024-06-27 23:41:21,865 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 67 changer transitions 0/388 dead transitions. [2024-06-27 23:41:21,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 388 transitions, 5723 flow [2024-06-27 23:41:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:41:21,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:41:21,867 INFO L175 Difference]: Start difference. First operand has 228 places, 361 transitions, 4739 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:41:21,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 388 transitions, 5723 flow [2024-06-27 23:41:22,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 388 transitions, 5576 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 23:41:22,447 INFO L231 Difference]: Finished difference. Result has 229 places, 372 transitions, 4932 flow [2024-06-27 23:41:22,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4932, PETRI_PLACES=229, PETRI_TRANSITIONS=372} [2024-06-27 23:41:22,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 23:41:22,448 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 372 transitions, 4932 flow [2024-06-27 23:41:22,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:22,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:22,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:22,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:41:22,449 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:22,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash 236496811, now seen corresponding path program 4 times [2024-06-27 23:41:22,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:22,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369981242] [2024-06-27 23:41:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:22,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:23,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:23,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369981242] [2024-06-27 23:41:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369981242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:23,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279560111] [2024-06-27 23:41:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:23,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:23,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 372 transitions, 4932 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:23,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:23,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:23,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:24,801 INFO L124 PetriNetUnfolderBase]: 4049/6860 cut-off events. [2024-06-27 23:41:24,802 INFO L125 PetriNetUnfolderBase]: For 314432/314438 co-relation queries the response was YES. [2024-06-27 23:41:24,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6860 events. 4049/6860 cut-off events. For 314432/314438 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 47989 event pairs, 1534 based on Foata normal form. 5/6859 useless extension candidates. Maximal degree in co-relation 48996. Up to 6226 conditions per place. [2024-06-27 23:41:24,876 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 59 changer transitions 0/402 dead transitions. [2024-06-27 23:41:24,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 402 transitions, 6150 flow [2024-06-27 23:41:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:41:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:41:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:41:24,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 23:41:24,877 INFO L175 Difference]: Start difference. First operand has 229 places, 372 transitions, 4932 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:41:24,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 402 transitions, 6150 flow [2024-06-27 23:41:25,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 402 transitions, 5879 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-27 23:41:25,560 INFO L231 Difference]: Finished difference. Result has 231 places, 389 transitions, 5137 flow [2024-06-27 23:41:25,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5137, PETRI_PLACES=231, PETRI_TRANSITIONS=389} [2024-06-27 23:41:25,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 23:41:25,561 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 389 transitions, 5137 flow [2024-06-27 23:41:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:25,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:25,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:25,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:41:25,561 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:25,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:25,562 INFO L85 PathProgramCache]: Analyzing trace with hash 236504747, now seen corresponding path program 2 times [2024-06-27 23:41:25,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:25,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286915532] [2024-06-27 23:41:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:26,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:26,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286915532] [2024-06-27 23:41:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286915532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:26,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862238658] [2024-06-27 23:41:26,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:26,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:26,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:26,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 389 transitions, 5137 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:26,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:26,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:26,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:28,124 INFO L124 PetriNetUnfolderBase]: 3933/6671 cut-off events. [2024-06-27 23:41:28,124 INFO L125 PetriNetUnfolderBase]: For 321898/321910 co-relation queries the response was YES. [2024-06-27 23:41:28,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48498 conditions, 6671 events. 3933/6671 cut-off events. For 321898/321910 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46587 event pairs, 1202 based on Foata normal form. 6/6629 useless extension candidates. Maximal degree in co-relation 48394. Up to 6024 conditions per place. [2024-06-27 23:41:28,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 55 changer transitions 0/408 dead transitions. [2024-06-27 23:41:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 408 transitions, 5981 flow [2024-06-27 23:41:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:41:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:41:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:41:28,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:41:28,202 INFO L175 Difference]: Start difference. First operand has 231 places, 389 transitions, 5137 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:41:28,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 408 transitions, 5981 flow [2024-06-27 23:41:28,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 408 transitions, 5915 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-27 23:41:28,943 INFO L231 Difference]: Finished difference. Result has 239 places, 395 transitions, 5271 flow [2024-06-27 23:41:28,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5071, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5271, PETRI_PLACES=239, PETRI_TRANSITIONS=395} [2024-06-27 23:41:28,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 23:41:28,944 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 395 transitions, 5271 flow [2024-06-27 23:41:28,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:28,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:28,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:28,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:41:28,945 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:28,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1276475287, now seen corresponding path program 5 times [2024-06-27 23:41:28,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:28,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964554394] [2024-06-27 23:41:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:28,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:29,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964554394] [2024-06-27 23:41:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964554394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:29,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127216361] [2024-06-27 23:41:29,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:29,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:29,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:30,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:30,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 395 transitions, 5271 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:30,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:30,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:31,377 INFO L124 PetriNetUnfolderBase]: 4069/6885 cut-off events. [2024-06-27 23:41:31,377 INFO L125 PetriNetUnfolderBase]: For 339715/339721 co-relation queries the response was YES. [2024-06-27 23:41:31,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50455 conditions, 6885 events. 4069/6885 cut-off events. For 339715/339721 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48123 event pairs, 1531 based on Foata normal form. 8/6886 useless extension candidates. Maximal degree in co-relation 50348. Up to 6207 conditions per place. [2024-06-27 23:41:31,452 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 69 changer transitions 0/419 dead transitions. [2024-06-27 23:41:31,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 419 transitions, 6336 flow [2024-06-27 23:41:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:41:31,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:41:31,472 INFO L175 Difference]: Start difference. First operand has 239 places, 395 transitions, 5271 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:41:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 419 transitions, 6336 flow [2024-06-27 23:41:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 419 transitions, 6112 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 23:41:32,269 INFO L231 Difference]: Finished difference. Result has 240 places, 403 transitions, 5397 flow [2024-06-27 23:41:32,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5397, PETRI_PLACES=240, PETRI_TRANSITIONS=403} [2024-06-27 23:41:32,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 23:41:32,269 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 403 transitions, 5397 flow [2024-06-27 23:41:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:32,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:32,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:32,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:41:32,270 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:32,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2094443271, now seen corresponding path program 6 times [2024-06-27 23:41:32,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:32,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526234866] [2024-06-27 23:41:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:33,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:33,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526234866] [2024-06-27 23:41:33,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526234866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:33,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:33,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634745555] [2024-06-27 23:41:33,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:33,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:33,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:33,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 403 transitions, 5397 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:33,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:33,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:33,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:34,699 INFO L124 PetriNetUnfolderBase]: 4079/6903 cut-off events. [2024-06-27 23:41:34,699 INFO L125 PetriNetUnfolderBase]: For 349615/349621 co-relation queries the response was YES. [2024-06-27 23:41:34,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51284 conditions, 6903 events. 4079/6903 cut-off events. For 349615/349621 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48318 event pairs, 1527 based on Foata normal form. 6/6902 useless extension candidates. Maximal degree in co-relation 51176. Up to 6185 conditions per place. [2024-06-27 23:41:34,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 96 changer transitions 0/421 dead transitions. [2024-06-27 23:41:34,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 421 transitions, 6492 flow [2024-06-27 23:41:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:41:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:41:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:41:34,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 23:41:34,787 INFO L175 Difference]: Start difference. First operand has 240 places, 403 transitions, 5397 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:41:34,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 421 transitions, 6492 flow [2024-06-27 23:41:35,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 421 transitions, 6242 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 23:41:35,592 INFO L231 Difference]: Finished difference. Result has 242 places, 408 transitions, 5528 flow [2024-06-27 23:41:35,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5528, PETRI_PLACES=242, PETRI_TRANSITIONS=408} [2024-06-27 23:41:35,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 23:41:35,592 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 408 transitions, 5528 flow [2024-06-27 23:41:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:35,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:35,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:35,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:41:35,593 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:35,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1004414201, now seen corresponding path program 7 times [2024-06-27 23:41:35,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:35,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188111504] [2024-06-27 23:41:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:35,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:36,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:36,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188111504] [2024-06-27 23:41:36,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188111504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:36,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:36,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:36,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347847483] [2024-06-27 23:41:36,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:36,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:36,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:36,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 408 transitions, 5528 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:36,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:36,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:36,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:38,091 INFO L124 PetriNetUnfolderBase]: 4086/6915 cut-off events. [2024-06-27 23:41:38,091 INFO L125 PetriNetUnfolderBase]: For 364654/364663 co-relation queries the response was YES. [2024-06-27 23:41:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52446 conditions, 6915 events. 4086/6915 cut-off events. For 364654/364663 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48404 event pairs, 1544 based on Foata normal form. 7/6911 useless extension candidates. Maximal degree in co-relation 52336. Up to 6248 conditions per place. [2024-06-27 23:41:38,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 87 changer transitions 0/431 dead transitions. [2024-06-27 23:41:38,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 431 transitions, 6781 flow [2024-06-27 23:41:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:41:38,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:41:38,173 INFO L175 Difference]: Start difference. First operand has 242 places, 408 transitions, 5528 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:41:38,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 431 transitions, 6781 flow [2024-06-27 23:41:39,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 431 transitions, 6508 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 23:41:39,067 INFO L231 Difference]: Finished difference. Result has 247 places, 420 transitions, 5763 flow [2024-06-27 23:41:39,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5306, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5763, PETRI_PLACES=247, PETRI_TRANSITIONS=420} [2024-06-27 23:41:39,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 23:41:39,068 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 420 transitions, 5763 flow [2024-06-27 23:41:39,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:39,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:39,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:41:39,069 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:39,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 246822781, now seen corresponding path program 8 times [2024-06-27 23:41:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316981010] [2024-06-27 23:41:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:40,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:40,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316981010] [2024-06-27 23:41:40,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316981010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:40,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:40,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:40,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304192052] [2024-06-27 23:41:40,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:40,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:40,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 420 transitions, 5763 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:40,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:40,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:40,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:41,656 INFO L124 PetriNetUnfolderBase]: 4081/6911 cut-off events. [2024-06-27 23:41:41,656 INFO L125 PetriNetUnfolderBase]: For 375682/375691 co-relation queries the response was YES. [2024-06-27 23:41:41,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52878 conditions, 6911 events. 4081/6911 cut-off events. For 375682/375691 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48422 event pairs, 1543 based on Foata normal form. 7/6907 useless extension candidates. Maximal degree in co-relation 52766. Up to 6245 conditions per place. [2024-06-27 23:41:41,735 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 85 changer transitions 0/430 dead transitions. [2024-06-27 23:41:41,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 430 transitions, 6634 flow [2024-06-27 23:41:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:41:41,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 23:41:41,736 INFO L175 Difference]: Start difference. First operand has 247 places, 420 transitions, 5763 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:41:41,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 430 transitions, 6634 flow [2024-06-27 23:41:42,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 430 transitions, 6447 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-27 23:41:42,568 INFO L231 Difference]: Finished difference. Result has 253 places, 421 transitions, 5815 flow [2024-06-27 23:41:42,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5815, PETRI_PLACES=253, PETRI_TRANSITIONS=421} [2024-06-27 23:41:42,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 23:41:42,569 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 421 transitions, 5815 flow [2024-06-27 23:41:42,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:42,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:42,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:42,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:41:42,570 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:42,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:42,570 INFO L85 PathProgramCache]: Analyzing trace with hash -996787705, now seen corresponding path program 3 times [2024-06-27 23:41:42,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:42,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967065583] [2024-06-27 23:41:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:42,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:43,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:43,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967065583] [2024-06-27 23:41:43,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967065583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:43,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:43,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:43,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634910106] [2024-06-27 23:41:43,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:43,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:43,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:43,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:43,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 421 transitions, 5815 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:43,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:43,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:43,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:45,521 INFO L124 PetriNetUnfolderBase]: 3971/6717 cut-off events. [2024-06-27 23:41:45,521 INFO L125 PetriNetUnfolderBase]: For 380199/380222 co-relation queries the response was YES. [2024-06-27 23:41:45,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51924 conditions, 6717 events. 3971/6717 cut-off events. For 380199/380222 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 46810 event pairs, 1206 based on Foata normal form. 8/6666 useless extension candidates. Maximal degree in co-relation 51809. Up to 6009 conditions per place. [2024-06-27 23:41:45,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 297 selfloop transitions, 89 changer transitions 0/438 dead transitions. [2024-06-27 23:41:45,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 438 transitions, 6865 flow [2024-06-27 23:41:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:41:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:41:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:41:45,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:41:45,591 INFO L175 Difference]: Start difference. First operand has 253 places, 421 transitions, 5815 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:41:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 438 transitions, 6865 flow [2024-06-27 23:41:46,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 438 transitions, 6715 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:41:46,494 INFO L231 Difference]: Finished difference. Result has 257 places, 427 transitions, 5979 flow [2024-06-27 23:41:46,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5665, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5979, PETRI_PLACES=257, PETRI_TRANSITIONS=427} [2024-06-27 23:41:46,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 23:41:46,495 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 427 transitions, 5979 flow [2024-06-27 23:41:46,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:46,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:46,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:46,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:41:46,496 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:46,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -997233175, now seen corresponding path program 4 times [2024-06-27 23:41:46,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:46,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205183167] [2024-06-27 23:41:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:46,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:47,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205183167] [2024-06-27 23:41:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205183167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:47,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:47,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:47,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335067761] [2024-06-27 23:41:47,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:47,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:47,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:47,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:47,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 427 transitions, 5979 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:47,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:47,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:47,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:49,293 INFO L124 PetriNetUnfolderBase]: 3961/6709 cut-off events. [2024-06-27 23:41:49,293 INFO L125 PetriNetUnfolderBase]: For 392286/392329 co-relation queries the response was YES. [2024-06-27 23:41:49,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52464 conditions, 6709 events. 3961/6709 cut-off events. For 392286/392329 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 46878 event pairs, 1206 based on Foata normal form. 7/6657 useless extension candidates. Maximal degree in co-relation 52348. Up to 6003 conditions per place. [2024-06-27 23:41:49,371 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 88 changer transitions 0/441 dead transitions. [2024-06-27 23:41:49,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 441 transitions, 6981 flow [2024-06-27 23:41:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:41:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:41:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:41:49,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:41:49,372 INFO L175 Difference]: Start difference. First operand has 257 places, 427 transitions, 5979 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:41:49,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 441 transitions, 6981 flow [2024-06-27 23:41:50,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 441 transitions, 6819 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 23:41:50,236 INFO L231 Difference]: Finished difference. Result has 260 places, 430 transitions, 6067 flow [2024-06-27 23:41:50,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=260, PETRI_TRANSITIONS=430} [2024-06-27 23:41:50,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 23:41:50,237 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 430 transitions, 6067 flow [2024-06-27 23:41:50,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:50,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:50,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:50,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:41:50,237 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:50,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:50,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1445195621, now seen corresponding path program 5 times [2024-06-27 23:41:50,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120855202] [2024-06-27 23:41:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:50,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120855202] [2024-06-27 23:41:51,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120855202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:51,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:51,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695450009] [2024-06-27 23:41:51,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:51,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:51,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:51,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:51,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 430 transitions, 6067 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:51,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:51,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:52,974 INFO L124 PetriNetUnfolderBase]: 3957/6702 cut-off events. [2024-06-27 23:41:52,975 INFO L125 PetriNetUnfolderBase]: For 397910/397937 co-relation queries the response was YES. [2024-06-27 23:41:53,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52573 conditions, 6702 events. 3957/6702 cut-off events. For 397910/397937 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 46795 event pairs, 1205 based on Foata normal form. 7/6651 useless extension candidates. Maximal degree in co-relation 52455. Up to 6000 conditions per place. [2024-06-27 23:41:53,054 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 82 changer transitions 0/440 dead transitions. [2024-06-27 23:41:53,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 440 transitions, 6877 flow [2024-06-27 23:41:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:41:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:41:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:41:53,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:41:53,055 INFO L175 Difference]: Start difference. First operand has 260 places, 430 transitions, 6067 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:41:53,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 440 transitions, 6877 flow [2024-06-27 23:41:53,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 440 transitions, 6655 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 23:41:53,970 INFO L231 Difference]: Finished difference. Result has 264 places, 430 transitions, 6015 flow [2024-06-27 23:41:53,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6015, PETRI_PLACES=264, PETRI_TRANSITIONS=430} [2024-06-27 23:41:53,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 23:41:53,971 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 430 transitions, 6015 flow [2024-06-27 23:41:53,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:53,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:53,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:41:53,972 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:53,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2094451362, now seen corresponding path program 1 times [2024-06-27 23:41:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:53,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7181898] [2024-06-27 23:41:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:55,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7181898] [2024-06-27 23:41:55,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7181898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:55,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:55,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:55,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090463494] [2024-06-27 23:41:55,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:55,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:55,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:55,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:55,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:41:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 430 transitions, 6015 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:55,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:55,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:41:55,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:56,937 INFO L124 PetriNetUnfolderBase]: 4098/6922 cut-off events. [2024-06-27 23:41:56,937 INFO L125 PetriNetUnfolderBase]: For 415007/415007 co-relation queries the response was YES. [2024-06-27 23:41:56,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54258 conditions, 6922 events. 4098/6922 cut-off events. For 415007/415007 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48364 event pairs, 1877 based on Foata normal form. 1/6921 useless extension candidates. Maximal degree in co-relation 54139. Up to 6356 conditions per place. [2024-06-27 23:41:57,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 29 changer transitions 0/450 dead transitions. [2024-06-27 23:41:57,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 450 transitions, 7199 flow [2024-06-27 23:41:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:41:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:41:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:41:57,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:41:57,029 INFO L175 Difference]: Start difference. First operand has 264 places, 430 transitions, 6015 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:41:57,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 450 transitions, 7199 flow [2024-06-27 23:41:57,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 450 transitions, 6965 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 23:41:57,988 INFO L231 Difference]: Finished difference. Result has 264 places, 436 transitions, 5983 flow [2024-06-27 23:41:57,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5983, PETRI_PLACES=264, PETRI_TRANSITIONS=436} [2024-06-27 23:41:57,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 23:41:57,989 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 436 transitions, 5983 flow [2024-06-27 23:41:57,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:57,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:57,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:57,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:41:57,990 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:57,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2094457159, now seen corresponding path program 1 times [2024-06-27 23:41:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:57,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95086978] [2024-06-27 23:41:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:57,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:59,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95086978] [2024-06-27 23:41:59,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95086978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:59,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:59,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:41:59,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605721298] [2024-06-27 23:41:59,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:59,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:41:59,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:59,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:41:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:41:59,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:41:59,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 436 transitions, 5983 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:59,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:59,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:41:59,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:00,789 INFO L124 PetriNetUnfolderBase]: 4180/7006 cut-off events. [2024-06-27 23:42:00,789 INFO L125 PetriNetUnfolderBase]: For 430411/430411 co-relation queries the response was YES. [2024-06-27 23:42:00,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55451 conditions, 7006 events. 4180/7006 cut-off events. For 430411/430411 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48454 event pairs, 1922 based on Foata normal form. 1/7005 useless extension candidates. Maximal degree in co-relation 55331. Up to 6552 conditions per place. [2024-06-27 23:42:00,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 19 changer transitions 0/454 dead transitions. [2024-06-27 23:42:00,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 454 transitions, 7013 flow [2024-06-27 23:42:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 23:42:00,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 23:42:00,862 INFO L175 Difference]: Start difference. First operand has 264 places, 436 transitions, 5983 flow. Second operand 9 states and 147 transitions. [2024-06-27 23:42:00,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 454 transitions, 7013 flow [2024-06-27 23:42:01,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 454 transitions, 6914 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 23:42:01,761 INFO L231 Difference]: Finished difference. Result has 269 places, 441 transitions, 6022 flow [2024-06-27 23:42:01,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5886, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6022, PETRI_PLACES=269, PETRI_TRANSITIONS=441} [2024-06-27 23:42:01,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 23:42:01,761 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 441 transitions, 6022 flow [2024-06-27 23:42:01,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:01,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:01,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:01,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:42:01,762 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:01,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2094456942, now seen corresponding path program 2 times [2024-06-27 23:42:01,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:01,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584440082] [2024-06-27 23:42:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:03,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584440082] [2024-06-27 23:42:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584440082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:03,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:03,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:03,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090074827] [2024-06-27 23:42:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:03,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:03,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:03,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:03,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 441 transitions, 6022 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:03,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:03,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:03,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:04,786 INFO L124 PetriNetUnfolderBase]: 4110/6935 cut-off events. [2024-06-27 23:42:04,786 INFO L125 PetriNetUnfolderBase]: For 440859/440859 co-relation queries the response was YES. [2024-06-27 23:42:04,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55448 conditions, 6935 events. 4110/6935 cut-off events. For 440859/440859 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 48306 event pairs, 1878 based on Foata normal form. 1/6934 useless extension candidates. Maximal degree in co-relation 55325. Up to 6368 conditions per place. [2024-06-27 23:42:04,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 32 changer transitions 0/454 dead transitions. [2024-06-27 23:42:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 454 transitions, 6954 flow [2024-06-27 23:42:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:42:04,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:42:04,875 INFO L175 Difference]: Start difference. First operand has 269 places, 441 transitions, 6022 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:42:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 454 transitions, 6954 flow [2024-06-27 23:42:05,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 454 transitions, 6824 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 23:42:05,859 INFO L231 Difference]: Finished difference. Result has 273 places, 441 transitions, 5962 flow [2024-06-27 23:42:05,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5962, PETRI_PLACES=273, PETRI_TRANSITIONS=441} [2024-06-27 23:42:05,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 23:42:05,860 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 441 transitions, 5962 flow [2024-06-27 23:42:05,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:05,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:05,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:05,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:42:05,860 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:05,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:05,861 INFO L85 PathProgramCache]: Analyzing trace with hash -996781753, now seen corresponding path program 2 times [2024-06-27 23:42:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:05,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120717513] [2024-06-27 23:42:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:05,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:07,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120717513] [2024-06-27 23:42:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120717513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:07,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221950286] [2024-06-27 23:42:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:07,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:07,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:42:07,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 441 transitions, 5962 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:07,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:07,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:42:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:08,611 INFO L124 PetriNetUnfolderBase]: 4190/7022 cut-off events. [2024-06-27 23:42:08,611 INFO L125 PetriNetUnfolderBase]: For 454114/454117 co-relation queries the response was YES. [2024-06-27 23:42:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 7022 events. 4190/7022 cut-off events. For 454114/454117 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48640 event pairs, 1926 based on Foata normal form. 1/7019 useless extension candidates. Maximal degree in co-relation 56169. Up to 6520 conditions per place. [2024-06-27 23:42:08,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 405 selfloop transitions, 49 changer transitions 0/459 dead transitions. [2024-06-27 23:42:08,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 459 transitions, 7206 flow [2024-06-27 23:42:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:42:08,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:42:08,700 INFO L175 Difference]: Start difference. First operand has 273 places, 441 transitions, 5962 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:42:08,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 459 transitions, 7206 flow [2024-06-27 23:42:09,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 459 transitions, 7134 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:09,631 INFO L231 Difference]: Finished difference. Result has 275 places, 448 transitions, 6187 flow [2024-06-27 23:42:09,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5890, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6187, PETRI_PLACES=275, PETRI_TRANSITIONS=448} [2024-06-27 23:42:09,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 23:42:09,632 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 448 transitions, 6187 flow [2024-06-27 23:42:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:09,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:09,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:09,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:42:09,633 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:09,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash -997048663, now seen corresponding path program 3 times [2024-06-27 23:42:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:09,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365101356] [2024-06-27 23:42:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365101356] [2024-06-27 23:42:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365101356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:10,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691831785] [2024-06-27 23:42:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:11,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:11,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 448 transitions, 6187 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:11,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:11,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:11,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:12,387 INFO L124 PetriNetUnfolderBase]: 4141/6979 cut-off events. [2024-06-27 23:42:12,388 INFO L125 PetriNetUnfolderBase]: For 478947/478950 co-relation queries the response was YES. [2024-06-27 23:42:12,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57243 conditions, 6979 events. 4141/6979 cut-off events. For 478947/478950 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48611 event pairs, 1881 based on Foata normal form. 4/6980 useless extension candidates. Maximal degree in co-relation 57117. Up to 6393 conditions per place. [2024-06-27 23:42:12,479 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 48 changer transitions 0/472 dead transitions. [2024-06-27 23:42:12,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 472 transitions, 7706 flow [2024-06-27 23:42:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:42:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:42:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:42:12,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:42:12,481 INFO L175 Difference]: Start difference. First operand has 275 places, 448 transitions, 6187 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:42:12,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 472 transitions, 7706 flow [2024-06-27 23:42:13,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 472 transitions, 7551 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 23:42:13,602 INFO L231 Difference]: Finished difference. Result has 278 places, 460 transitions, 6449 flow [2024-06-27 23:42:13,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6449, PETRI_PLACES=278, PETRI_TRANSITIONS=460} [2024-06-27 23:42:13,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 23:42:13,603 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 460 transitions, 6449 flow [2024-06-27 23:42:13,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:13,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:13,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:13,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:42:13,604 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:13,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:13,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1004400530, now seen corresponding path program 3 times [2024-06-27 23:42:13,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:13,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331302569] [2024-06-27 23:42:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:13,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:15,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331302569] [2024-06-27 23:42:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331302569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:15,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:15,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343878622] [2024-06-27 23:42:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:15,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:15,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:15,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:15,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:15,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 460 transitions, 6449 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:15,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:15,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:15,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:16,707 INFO L124 PetriNetUnfolderBase]: 4154/6998 cut-off events. [2024-06-27 23:42:16,708 INFO L125 PetriNetUnfolderBase]: For 495162/495165 co-relation queries the response was YES. [2024-06-27 23:42:16,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58108 conditions, 6998 events. 4154/6998 cut-off events. For 495162/495165 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 48739 event pairs, 1886 based on Foata normal form. 1/6995 useless extension candidates. Maximal degree in co-relation 57980. Up to 6393 conditions per place. [2024-06-27 23:42:16,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 51 changer transitions 0/481 dead transitions. [2024-06-27 23:42:16,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 481 transitions, 7925 flow [2024-06-27 23:42:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:42:16,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:42:16,796 INFO L175 Difference]: Start difference. First operand has 278 places, 460 transitions, 6449 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:42:16,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 481 transitions, 7925 flow [2024-06-27 23:42:17,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 481 transitions, 7796 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 23:42:17,981 INFO L231 Difference]: Finished difference. Result has 284 places, 469 transitions, 6674 flow [2024-06-27 23:42:17,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6674, PETRI_PLACES=284, PETRI_TRANSITIONS=469} [2024-06-27 23:42:17,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 23:42:17,984 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 469 transitions, 6674 flow [2024-06-27 23:42:17,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:17,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:17,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:42:17,984 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:17,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1004400313, now seen corresponding path program 4 times [2024-06-27 23:42:17,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:17,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631482764] [2024-06-27 23:42:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:17,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:19,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:19,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631482764] [2024-06-27 23:42:19,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631482764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:19,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:19,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682191097] [2024-06-27 23:42:19,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:19,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:19,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:19,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:42:19,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 469 transitions, 6674 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:19,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:19,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:42:19,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:20,979 INFO L124 PetriNetUnfolderBase]: 4218/7062 cut-off events. [2024-06-27 23:42:20,979 INFO L125 PetriNetUnfolderBase]: For 508755/508758 co-relation queries the response was YES. [2024-06-27 23:42:21,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59178 conditions, 7062 events. 4218/7062 cut-off events. For 508755/508758 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48803 event pairs, 1926 based on Foata normal form. 3/7062 useless extension candidates. Maximal degree in co-relation 59048. Up to 6578 conditions per place. [2024-06-27 23:42:21,069 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 40 changer transitions 0/481 dead transitions. [2024-06-27 23:42:21,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 481 transitions, 7690 flow [2024-06-27 23:42:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 23:42:21,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 23:42:21,070 INFO L175 Difference]: Start difference. First operand has 284 places, 469 transitions, 6674 flow. Second operand 9 states and 150 transitions. [2024-06-27 23:42:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 481 transitions, 7690 flow [2024-06-27 23:42:22,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 481 transitions, 7547 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 23:42:22,414 INFO L231 Difference]: Finished difference. Result has 289 places, 471 transitions, 6649 flow [2024-06-27 23:42:22,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6531, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6649, PETRI_PLACES=289, PETRI_TRANSITIONS=471} [2024-06-27 23:42:22,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 23:42:22,415 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 471 transitions, 6649 flow [2024-06-27 23:42:22,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:22,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:22,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:42:22,416 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:22,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -997048880, now seen corresponding path program 4 times [2024-06-27 23:42:22,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675717193] [2024-06-27 23:42:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:23,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:23,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675717193] [2024-06-27 23:42:23,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675717193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:23,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:23,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:23,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044729528] [2024-06-27 23:42:23,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:23,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:23,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:23,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:23,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 471 transitions, 6649 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:23,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:23,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:25,501 INFO L124 PetriNetUnfolderBase]: 4148/6990 cut-off events. [2024-06-27 23:42:25,501 INFO L125 PetriNetUnfolderBase]: For 516992/516995 co-relation queries the response was YES. [2024-06-27 23:42:25,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58721 conditions, 6990 events. 4148/6990 cut-off events. For 516992/516995 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48727 event pairs, 1886 based on Foata normal form. 1/6987 useless extension candidates. Maximal degree in co-relation 58589. Up to 6387 conditions per place. [2024-06-27 23:42:25,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 54 changer transitions 0/482 dead transitions. [2024-06-27 23:42:25,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 482 transitions, 7751 flow [2024-06-27 23:42:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:42:25,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:42:25,591 INFO L175 Difference]: Start difference. First operand has 289 places, 471 transitions, 6649 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:42:25,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 482 transitions, 7751 flow [2024-06-27 23:42:27,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 482 transitions, 7610 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 23:42:27,070 INFO L231 Difference]: Finished difference. Result has 293 places, 471 transitions, 6622 flow [2024-06-27 23:42:27,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6508, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6622, PETRI_PLACES=293, PETRI_TRANSITIONS=471} [2024-06-27 23:42:27,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 23:42:27,070 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 471 transitions, 6622 flow [2024-06-27 23:42:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:27,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:27,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:42:27,071 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:27,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1004406110, now seen corresponding path program 5 times [2024-06-27 23:42:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:27,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684562803] [2024-06-27 23:42:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:28,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684562803] [2024-06-27 23:42:28,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684562803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:28,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:28,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026458818] [2024-06-27 23:42:28,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:28,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:28,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:28,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:28,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:28,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 471 transitions, 6622 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:28,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:28,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:28,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:30,348 INFO L124 PetriNetUnfolderBase]: 4145/6988 cut-off events. [2024-06-27 23:42:30,348 INFO L125 PetriNetUnfolderBase]: For 525048/525051 co-relation queries the response was YES. [2024-06-27 23:42:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58783 conditions, 6988 events. 4145/6988 cut-off events. For 525048/525051 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48770 event pairs, 1886 based on Foata normal form. 1/6985 useless extension candidates. Maximal degree in co-relation 58649. Up to 6384 conditions per place. [2024-06-27 23:42:30,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 52 changer transitions 0/481 dead transitions. [2024-06-27 23:42:30,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 481 transitions, 7582 flow [2024-06-27 23:42:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:42:30,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:42:30,446 INFO L175 Difference]: Start difference. First operand has 293 places, 471 transitions, 6622 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:42:30,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 481 transitions, 7582 flow [2024-06-27 23:42:31,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 481 transitions, 7396 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:31,748 INFO L231 Difference]: Finished difference. Result has 294 places, 471 transitions, 6546 flow [2024-06-27 23:42:31,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6436, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6546, PETRI_PLACES=294, PETRI_TRANSITIONS=471} [2024-06-27 23:42:31,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 23:42:31,749 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 471 transitions, 6546 flow [2024-06-27 23:42:31,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:31,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:31,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:42:31,749 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:31,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:31,750 INFO L85 PathProgramCache]: Analyzing trace with hash -996771833, now seen corresponding path program 1 times [2024-06-27 23:42:31,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:31,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298774749] [2024-06-27 23:42:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:31,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298774749] [2024-06-27 23:42:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298774749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:33,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:42:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437212011] [2024-06-27 23:42:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:33,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:42:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:42:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:42:33,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:33,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 471 transitions, 6546 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:33,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:33,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:33,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:35,354 INFO L124 PetriNetUnfolderBase]: 4004/6782 cut-off events. [2024-06-27 23:42:35,354 INFO L125 PetriNetUnfolderBase]: For 530867/530880 co-relation queries the response was YES. [2024-06-27 23:42:35,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57226 conditions, 6782 events. 4004/6782 cut-off events. For 530867/530880 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 47676 event pairs, 1862 based on Foata normal form. 6/6745 useless extension candidates. Maximal degree in co-relation 57091. Up to 6191 conditions per place. [2024-06-27 23:42:35,585 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 411 selfloop transitions, 22 changer transitions 0/485 dead transitions. [2024-06-27 23:42:35,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 485 transitions, 7522 flow [2024-06-27 23:42:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 23:42:35,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 23:42:35,586 INFO L175 Difference]: Start difference. First operand has 294 places, 471 transitions, 6546 flow. Second operand 10 states and 167 transitions. [2024-06-27 23:42:35,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 485 transitions, 7522 flow [2024-06-27 23:42:36,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 485 transitions, 7406 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:36,744 INFO L231 Difference]: Finished difference. Result has 296 places, 474 transitions, 6560 flow [2024-06-27 23:42:36,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6560, PETRI_PLACES=296, PETRI_TRANSITIONS=474} [2024-06-27 23:42:36,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 23:42:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 474 transitions, 6560 flow [2024-06-27 23:42:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:36,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:36,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:36,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:42:36,745 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:36,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1286408649, now seen corresponding path program 1 times [2024-06-27 23:42:36,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:36,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713453922] [2024-06-27 23:42:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:37,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713453922] [2024-06-27 23:42:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713453922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:37,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:37,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814514991] [2024-06-27 23:42:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:37,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:42:37,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 474 transitions, 6560 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:37,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:37,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:42:37,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:39,265 INFO L124 PetriNetUnfolderBase]: 3283/5905 cut-off events. [2024-06-27 23:42:39,265 INFO L125 PetriNetUnfolderBase]: For 537742/538019 co-relation queries the response was YES. [2024-06-27 23:42:39,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51211 conditions, 5905 events. 3283/5905 cut-off events. For 537742/538019 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 43870 event pairs, 844 based on Foata normal form. 55/5729 useless extension candidates. Maximal degree in co-relation 51075. Up to 4539 conditions per place. [2024-06-27 23:42:39,339 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 57 changer transitions 0/504 dead transitions. [2024-06-27 23:42:39,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 504 transitions, 7534 flow [2024-06-27 23:42:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:42:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:42:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 23:42:39,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 23:42:39,340 INFO L175 Difference]: Start difference. First operand has 296 places, 474 transitions, 6560 flow. Second operand 8 states and 174 transitions. [2024-06-27 23:42:39,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 504 transitions, 7534 flow [2024-06-27 23:42:40,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 504 transitions, 7426 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:40,346 INFO L231 Difference]: Finished difference. Result has 296 places, 480 transitions, 6705 flow [2024-06-27 23:42:40,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6452, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6705, PETRI_PLACES=296, PETRI_TRANSITIONS=480} [2024-06-27 23:42:40,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 23:42:40,346 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 480 transitions, 6705 flow [2024-06-27 23:42:40,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:40,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:40,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:42:40,347 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:40,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1092476265, now seen corresponding path program 1 times [2024-06-27 23:42:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213584511] [2024-06-27 23:42:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213584511] [2024-06-27 23:42:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213584511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:41,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460055930] [2024-06-27 23:42:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:41,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:41,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:41,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 480 transitions, 6705 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:41,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:41,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:41,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:43,229 INFO L124 PetriNetUnfolderBase]: 4169/7050 cut-off events. [2024-06-27 23:42:43,229 INFO L125 PetriNetUnfolderBase]: For 571596/571600 co-relation queries the response was YES. [2024-06-27 23:42:43,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60144 conditions, 7050 events. 4169/7050 cut-off events. For 571596/571600 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49468 event pairs, 1450 based on Foata normal form. 4/7042 useless extension candidates. Maximal degree in co-relation 60007. Up to 6311 conditions per place. [2024-06-27 23:42:43,322 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 418 selfloop transitions, 84 changer transitions 0/523 dead transitions. [2024-06-27 23:42:43,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 523 transitions, 8038 flow [2024-06-27 23:42:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:42:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:42:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 23:42:43,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-27 23:42:43,324 INFO L175 Difference]: Start difference. First operand has 296 places, 480 transitions, 6705 flow. Second operand 11 states and 212 transitions. [2024-06-27 23:42:43,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 523 transitions, 8038 flow [2024-06-27 23:42:44,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 523 transitions, 7879 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 23:42:44,671 INFO L231 Difference]: Finished difference. Result has 301 places, 484 transitions, 6854 flow [2024-06-27 23:42:44,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6854, PETRI_PLACES=301, PETRI_TRANSITIONS=484} [2024-06-27 23:42:44,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 23:42:44,671 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 484 transitions, 6854 flow [2024-06-27 23:42:44,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:44,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:44,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:42:44,672 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:44,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2030566743, now seen corresponding path program 2 times [2024-06-27 23:42:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717308317] [2024-06-27 23:42:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:45,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717308317] [2024-06-27 23:42:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717308317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:45,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:45,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:45,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078509797] [2024-06-27 23:42:45,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:45,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:45,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:45,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:45,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 484 transitions, 6854 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:45,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:45,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:45,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:47,485 INFO L124 PetriNetUnfolderBase]: 4179/7047 cut-off events. [2024-06-27 23:42:47,486 INFO L125 PetriNetUnfolderBase]: For 593257/593260 co-relation queries the response was YES. [2024-06-27 23:42:47,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61497 conditions, 7047 events. 4179/7047 cut-off events. For 593257/593260 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 49249 event pairs, 1473 based on Foata normal form. 3/7034 useless extension candidates. Maximal degree in co-relation 61359. Up to 6365 conditions per place. [2024-06-27 23:42:47,585 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 77 changer transitions 0/534 dead transitions. [2024-06-27 23:42:47,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 534 transitions, 8521 flow [2024-06-27 23:42:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:42:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:42:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:42:47,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:42:47,587 INFO L175 Difference]: Start difference. First operand has 301 places, 484 transitions, 6854 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:42:47,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 534 transitions, 8521 flow [2024-06-27 23:42:49,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 534 transitions, 8203 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:49,247 INFO L231 Difference]: Finished difference. Result has 306 places, 502 transitions, 7124 flow [2024-06-27 23:42:49,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7124, PETRI_PLACES=306, PETRI_TRANSITIONS=502} [2024-06-27 23:42:49,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 23:42:49,251 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 502 transitions, 7124 flow [2024-06-27 23:42:49,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:49,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:49,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:49,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:42:49,252 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:49,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2125447847, now seen corresponding path program 2 times [2024-06-27 23:42:49,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:49,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180324065] [2024-06-27 23:42:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:49,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:50,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:50,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180324065] [2024-06-27 23:42:50,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180324065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:50,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:50,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:50,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968569151] [2024-06-27 23:42:50,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:50,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:50,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:50,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:50,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 502 transitions, 7124 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:50,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:50,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:50,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:52,158 INFO L124 PetriNetUnfolderBase]: 4192/7060 cut-off events. [2024-06-27 23:42:52,158 INFO L125 PetriNetUnfolderBase]: For 611880/611882 co-relation queries the response was YES. [2024-06-27 23:42:52,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62307 conditions, 7060 events. 4192/7060 cut-off events. For 611880/611882 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49260 event pairs, 1232 based on Foata normal form. 4/7058 useless extension candidates. Maximal degree in co-relation 62166. Up to 6384 conditions per place. [2024-06-27 23:42:52,266 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 49 changer transitions 0/534 dead transitions. [2024-06-27 23:42:52,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 534 transitions, 8349 flow [2024-06-27 23:42:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:42:52,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 23:42:52,268 INFO L175 Difference]: Start difference. First operand has 306 places, 502 transitions, 7124 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:42:52,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 534 transitions, 8349 flow [2024-06-27 23:42:54,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 534 transitions, 8171 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 23:42:54,022 INFO L231 Difference]: Finished difference. Result has 310 places, 506 transitions, 7158 flow [2024-06-27 23:42:54,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7158, PETRI_PLACES=310, PETRI_TRANSITIONS=506} [2024-06-27 23:42:54,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 23:42:54,022 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 506 transitions, 7158 flow [2024-06-27 23:42:54,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:54,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:54,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:54,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:42:54,023 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:54,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2134018727, now seen corresponding path program 3 times [2024-06-27 23:42:54,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:54,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735065866] [2024-06-27 23:42:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:54,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:55,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:55,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735065866] [2024-06-27 23:42:55,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735065866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:55,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:55,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26850357] [2024-06-27 23:42:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:55,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:55,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:55,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:55,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 506 transitions, 7158 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:55,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:55,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:55,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:57,036 INFO L124 PetriNetUnfolderBase]: 4223/7107 cut-off events. [2024-06-27 23:42:57,036 INFO L125 PetriNetUnfolderBase]: For 624984/624986 co-relation queries the response was YES. [2024-06-27 23:42:57,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62994 conditions, 7107 events. 4223/7107 cut-off events. For 624984/624986 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49574 event pairs, 1258 based on Foata normal form. 4/7105 useless extension candidates. Maximal degree in co-relation 62851. Up to 6479 conditions per place. [2024-06-27 23:42:57,129 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 50 changer transitions 0/542 dead transitions. [2024-06-27 23:42:57,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 542 transitions, 8494 flow [2024-06-27 23:42:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:42:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:42:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:42:57,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:42:57,131 INFO L175 Difference]: Start difference. First operand has 310 places, 506 transitions, 7158 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:42:57,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 542 transitions, 8494 flow [2024-06-27 23:42:58,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 542 transitions, 8302 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:42:58,550 INFO L231 Difference]: Finished difference. Result has 313 places, 519 transitions, 7325 flow [2024-06-27 23:42:58,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7325, PETRI_PLACES=313, PETRI_TRANSITIONS=519} [2024-06-27 23:42:58,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 23:42:58,550 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 519 transitions, 7325 flow [2024-06-27 23:42:58,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:58,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:58,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:58,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:42:58,551 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:58,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1336568383, now seen corresponding path program 4 times [2024-06-27 23:42:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781310714] [2024-06-27 23:42:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:59,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:59,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781310714] [2024-06-27 23:42:59,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781310714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:59,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:59,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:42:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443704910] [2024-06-27 23:42:59,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:59,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:42:59,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:42:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:42:59,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:42:59,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 519 transitions, 7325 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:59,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:59,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:42:59,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:01,664 INFO L124 PetriNetUnfolderBase]: 4231/7114 cut-off events. [2024-06-27 23:43:01,665 INFO L125 PetriNetUnfolderBase]: For 636805/636805 co-relation queries the response was YES. [2024-06-27 23:43:01,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63314 conditions, 7114 events. 4231/7114 cut-off events. For 636805/636805 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49584 event pairs, 1214 based on Foata normal form. 2/7110 useless extension candidates. Maximal degree in co-relation 63169. Up to 6479 conditions per place. [2024-06-27 23:43:01,768 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 64 changer transitions 0/541 dead transitions. [2024-06-27 23:43:01,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 541 transitions, 8521 flow [2024-06-27 23:43:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:43:01,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:43:01,770 INFO L175 Difference]: Start difference. First operand has 313 places, 519 transitions, 7325 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:43:01,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 541 transitions, 8521 flow [2024-06-27 23:43:03,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 541 transitions, 8355 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 23:43:03,313 INFO L231 Difference]: Finished difference. Result has 317 places, 521 transitions, 7381 flow [2024-06-27 23:43:03,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7381, PETRI_PLACES=317, PETRI_TRANSITIONS=521} [2024-06-27 23:43:03,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 23:43:03,314 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 521 transitions, 7381 flow [2024-06-27 23:43:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:03,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:03,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:43:03,315 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:03,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -475293241, now seen corresponding path program 3 times [2024-06-27 23:43:03,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:03,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019787940] [2024-06-27 23:43:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:04,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019787940] [2024-06-27 23:43:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019787940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:04,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:04,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:04,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681899594] [2024-06-27 23:43:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:04,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:04,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:04,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:04,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 521 transitions, 7381 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:06,219 INFO L124 PetriNetUnfolderBase]: 4246/7143 cut-off events. [2024-06-27 23:43:06,220 INFO L125 PetriNetUnfolderBase]: For 650014/650016 co-relation queries the response was YES. [2024-06-27 23:43:06,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63718 conditions, 7143 events. 4246/7143 cut-off events. For 650014/650016 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49911 event pairs, 1254 based on Foata normal form. 4/7141 useless extension candidates. Maximal degree in co-relation 63572. Up to 6503 conditions per place. [2024-06-27 23:43:06,321 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 57 changer transitions 0/555 dead transitions. [2024-06-27 23:43:06,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 555 transitions, 8756 flow [2024-06-27 23:43:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:43:06,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 23:43:06,323 INFO L175 Difference]: Start difference. First operand has 317 places, 521 transitions, 7381 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:43:06,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 555 transitions, 8756 flow [2024-06-27 23:43:08,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 555 transitions, 8467 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 23:43:08,081 INFO L231 Difference]: Finished difference. Result has 321 places, 531 transitions, 7476 flow [2024-06-27 23:43:08,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7092, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7476, PETRI_PLACES=321, PETRI_TRANSITIONS=531} [2024-06-27 23:43:08,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-27 23:43:08,082 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 531 transitions, 7476 flow [2024-06-27 23:43:08,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:08,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:08,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:43:08,083 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:08,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1623452737, now seen corresponding path program 4 times [2024-06-27 23:43:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:08,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606728379] [2024-06-27 23:43:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:09,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606728379] [2024-06-27 23:43:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606728379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:09,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:09,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723087969] [2024-06-27 23:43:09,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:09,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:09,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 531 transitions, 7476 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:09,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:09,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:09,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:11,032 INFO L124 PetriNetUnfolderBase]: 4256/7157 cut-off events. [2024-06-27 23:43:11,032 INFO L125 PetriNetUnfolderBase]: For 666066/666068 co-relation queries the response was YES. [2024-06-27 23:43:11,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64440 conditions, 7157 events. 4256/7157 cut-off events. For 666066/666068 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 49879 event pairs, 1253 based on Foata normal form. 3/7154 useless extension candidates. Maximal degree in co-relation 64293. Up to 6500 conditions per place. [2024-06-27 23:43:11,139 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 72 changer transitions 0/562 dead transitions. [2024-06-27 23:43:11,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 562 transitions, 8775 flow [2024-06-27 23:43:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:43:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:43:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 23:43:11,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:43:11,142 INFO L175 Difference]: Start difference. First operand has 321 places, 531 transitions, 7476 flow. Second operand 10 states and 190 transitions. [2024-06-27 23:43:11,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 562 transitions, 8775 flow [2024-06-27 23:43:13,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 562 transitions, 8554 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-27 23:43:13,017 INFO L231 Difference]: Finished difference. Result has 326 places, 537 transitions, 7551 flow [2024-06-27 23:43:13,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7551, PETRI_PLACES=326, PETRI_TRANSITIONS=537} [2024-06-27 23:43:13,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 23:43:13,018 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 537 transitions, 7551 flow [2024-06-27 23:43:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:13,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:13,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:43:13,019 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:13,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2051189597, now seen corresponding path program 1 times [2024-06-27 23:43:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546910425] [2024-06-27 23:43:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546910425] [2024-06-27 23:43:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546910425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:14,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:14,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:14,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754748775] [2024-06-27 23:43:14,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:14,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:14,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:14,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:14,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 537 transitions, 7551 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:14,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:14,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:14,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:16,074 INFO L124 PetriNetUnfolderBase]: 4258/7171 cut-off events. [2024-06-27 23:43:16,074 INFO L125 PetriNetUnfolderBase]: For 683089/683094 co-relation queries the response was YES. [2024-06-27 23:43:16,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65060 conditions, 7171 events. 4258/7171 cut-off events. For 683089/683094 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 50217 event pairs, 1533 based on Foata normal form. 3/7166 useless extension candidates. Maximal degree in co-relation 64912. Up to 6479 conditions per place. [2024-06-27 23:43:16,174 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 67 changer transitions 0/565 dead transitions. [2024-06-27 23:43:16,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 565 transitions, 8777 flow [2024-06-27 23:43:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:43:16,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 23:43:16,175 INFO L175 Difference]: Start difference. First operand has 326 places, 537 transitions, 7551 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:43:16,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 565 transitions, 8777 flow [2024-06-27 23:43:18,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 565 transitions, 8493 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-27 23:43:18,197 INFO L231 Difference]: Finished difference. Result has 326 places, 540 transitions, 7449 flow [2024-06-27 23:43:18,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7267, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7449, PETRI_PLACES=326, PETRI_TRANSITIONS=540} [2024-06-27 23:43:18,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 23:43:18,198 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 540 transitions, 7449 flow [2024-06-27 23:43:18,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:18,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:18,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:18,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:43:18,199 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:18,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:18,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2051368343, now seen corresponding path program 5 times [2024-06-27 23:43:18,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:18,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252106138] [2024-06-27 23:43:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:18,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252106138] [2024-06-27 23:43:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252106138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:19,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:19,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275530903] [2024-06-27 23:43:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:19,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:19,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:19,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 540 transitions, 7449 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:19,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:19,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:19,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:20,996 INFO L124 PetriNetUnfolderBase]: 4263/7168 cut-off events. [2024-06-27 23:43:20,996 INFO L125 PetriNetUnfolderBase]: For 695567/695570 co-relation queries the response was YES. [2024-06-27 23:43:21,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65224 conditions, 7168 events. 4263/7168 cut-off events. For 695567/695570 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 49955 event pairs, 1174 based on Foata normal form. 3/7164 useless extension candidates. Maximal degree in co-relation 65075. Up to 6421 conditions per place. [2024-06-27 23:43:21,099 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 96 changer transitions 0/571 dead transitions. [2024-06-27 23:43:21,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 571 transitions, 8807 flow [2024-06-27 23:43:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:43:21,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 23:43:21,100 INFO L175 Difference]: Start difference. First operand has 326 places, 540 transitions, 7449 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:43:21,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 571 transitions, 8807 flow [2024-06-27 23:43:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 571 transitions, 8601 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 23:43:23,332 INFO L231 Difference]: Finished difference. Result has 328 places, 546 transitions, 7629 flow [2024-06-27 23:43:23,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7243, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7629, PETRI_PLACES=328, PETRI_TRANSITIONS=546} [2024-06-27 23:43:23,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 23:43:23,333 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 546 transitions, 7629 flow [2024-06-27 23:43:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:23,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:23,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:43:23,333 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:23,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2051069627, now seen corresponding path program 2 times [2024-06-27 23:43:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:23,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225275043] [2024-06-27 23:43:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:23,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:24,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225275043] [2024-06-27 23:43:24,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225275043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:24,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:24,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:24,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912092567] [2024-06-27 23:43:24,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:24,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:24,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:24,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:24,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:24,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 546 transitions, 7629 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:24,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:24,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:24,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:26,644 INFO L124 PetriNetUnfolderBase]: 4268/7189 cut-off events. [2024-06-27 23:43:26,644 INFO L125 PetriNetUnfolderBase]: For 718711/718716 co-relation queries the response was YES. [2024-06-27 23:43:26,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66244 conditions, 7189 events. 4268/7189 cut-off events. For 718711/718716 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 50349 event pairs, 1532 based on Foata normal form. 3/7184 useless extension candidates. Maximal degree in co-relation 66093. Up to 6482 conditions per place. [2024-06-27 23:43:26,739 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 74 changer transitions 0/571 dead transitions. [2024-06-27 23:43:26,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 571 transitions, 8927 flow [2024-06-27 23:43:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:43:26,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 23:43:26,740 INFO L175 Difference]: Start difference. First operand has 328 places, 546 transitions, 7629 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:43:26,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 571 transitions, 8927 flow [2024-06-27 23:43:29,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 571 transitions, 8636 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 23:43:29,139 INFO L231 Difference]: Finished difference. Result has 331 places, 549 transitions, 7609 flow [2024-06-27 23:43:29,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7338, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7609, PETRI_PLACES=331, PETRI_TRANSITIONS=549} [2024-06-27 23:43:29,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 23:43:29,140 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 549 transitions, 7609 flow [2024-06-27 23:43:29,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:29,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:29,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:43:29,140 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:29,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2051069441, now seen corresponding path program 1 times [2024-06-27 23:43:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996745166] [2024-06-27 23:43:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:30,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:30,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996745166] [2024-06-27 23:43:30,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996745166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:30,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:30,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114365111] [2024-06-27 23:43:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:30,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:43:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 549 transitions, 7609 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:30,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:30,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:43:30,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:32,122 INFO L124 PetriNetUnfolderBase]: 4347/7274 cut-off events. [2024-06-27 23:43:32,122 INFO L125 PetriNetUnfolderBase]: For 736953/736958 co-relation queries the response was YES. [2024-06-27 23:43:32,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67278 conditions, 7274 events. 4347/7274 cut-off events. For 736953/736958 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50526 event pairs, 1566 based on Foata normal form. 5/7276 useless extension candidates. Maximal degree in co-relation 67128. Up to 6731 conditions per place. [2024-06-27 23:43:32,239 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 522 selfloop transitions, 47 changer transitions 0/574 dead transitions. [2024-06-27 23:43:32,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 574 transitions, 8925 flow [2024-06-27 23:43:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:43:32,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:43:32,241 INFO L175 Difference]: Start difference. First operand has 331 places, 549 transitions, 7609 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:43:32,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 574 transitions, 8925 flow [2024-06-27 23:43:34,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 574 transitions, 8678 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 23:43:34,462 INFO L231 Difference]: Finished difference. Result has 333 places, 552 transitions, 7559 flow [2024-06-27 23:43:34,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7362, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7559, PETRI_PLACES=333, PETRI_TRANSITIONS=552} [2024-06-27 23:43:34,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 23:43:34,463 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 552 transitions, 7559 flow [2024-06-27 23:43:34,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:34,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:34,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:34,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:43:34,463 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:34,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2051069813, now seen corresponding path program 6 times [2024-06-27 23:43:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:34,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178061260] [2024-06-27 23:43:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:34,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:35,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:35,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178061260] [2024-06-27 23:43:35,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178061260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:35,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:35,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:35,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787002422] [2024-06-27 23:43:35,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:35,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:35,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 552 transitions, 7559 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:35,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:35,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:35,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:37,322 INFO L124 PetriNetUnfolderBase]: 4286/7201 cut-off events. [2024-06-27 23:43:37,322 INFO L125 PetriNetUnfolderBase]: For 756994/756997 co-relation queries the response was YES. [2024-06-27 23:43:37,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67457 conditions, 7201 events. 4286/7201 cut-off events. For 756994/756997 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 50146 event pairs, 1172 based on Foata normal form. 3/7197 useless extension candidates. Maximal degree in co-relation 67306. Up to 6421 conditions per place. [2024-06-27 23:43:37,428 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 440 selfloop transitions, 115 changer transitions 0/577 dead transitions. [2024-06-27 23:43:37,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 577 transitions, 8887 flow [2024-06-27 23:43:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:43:37,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 23:43:37,429 INFO L175 Difference]: Start difference. First operand has 333 places, 552 transitions, 7559 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:43:37,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 577 transitions, 8887 flow [2024-06-27 23:43:39,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 577 transitions, 8714 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 23:43:39,694 INFO L231 Difference]: Finished difference. Result has 335 places, 555 transitions, 7759 flow [2024-06-27 23:43:39,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7386, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7759, PETRI_PLACES=335, PETRI_TRANSITIONS=555} [2024-06-27 23:43:39,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 23:43:39,694 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 555 transitions, 7759 flow [2024-06-27 23:43:39,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:39,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:39,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:39,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:43:39,695 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:39,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1873938107, now seen corresponding path program 3 times [2024-06-27 23:43:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821164249] [2024-06-27 23:43:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:39,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:41,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821164249] [2024-06-27 23:43:41,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821164249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:41,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:41,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:41,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741246905] [2024-06-27 23:43:41,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:41,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:41,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:41,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 555 transitions, 7759 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:41,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:41,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:41,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:42,875 INFO L124 PetriNetUnfolderBase]: 4299/7235 cut-off events. [2024-06-27 23:43:42,876 INFO L125 PetriNetUnfolderBase]: For 785675/785680 co-relation queries the response was YES. [2024-06-27 23:43:42,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68764 conditions, 7235 events. 4299/7235 cut-off events. For 785675/785680 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50625 event pairs, 1543 based on Foata normal form. 3/7230 useless extension candidates. Maximal degree in co-relation 68612. Up to 6483 conditions per place. [2024-06-27 23:43:42,987 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 98 changer transitions 0/581 dead transitions. [2024-06-27 23:43:42,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 581 transitions, 9359 flow [2024-06-27 23:43:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:43:42,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 23:43:42,988 INFO L175 Difference]: Start difference. First operand has 335 places, 555 transitions, 7759 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:43:42,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 581 transitions, 9359 flow [2024-06-27 23:43:45,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 581 transitions, 9041 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 23:43:45,339 INFO L231 Difference]: Finished difference. Result has 338 places, 561 transitions, 7890 flow [2024-06-27 23:43:45,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7441, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7890, PETRI_PLACES=338, PETRI_TRANSITIONS=561} [2024-06-27 23:43:45,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 23:43:45,340 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 561 transitions, 7890 flow [2024-06-27 23:43:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:45,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:45,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:43:45,341 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1873937921, now seen corresponding path program 2 times [2024-06-27 23:43:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221706379] [2024-06-27 23:43:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:45,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:46,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:46,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221706379] [2024-06-27 23:43:46,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221706379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:46,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:46,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044578878] [2024-06-27 23:43:46,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:46,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:46,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:43:46,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 561 transitions, 7890 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:46,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:46,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:43:46,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:48,289 INFO L124 PetriNetUnfolderBase]: 4386/7335 cut-off events. [2024-06-27 23:43:48,289 INFO L125 PetriNetUnfolderBase]: For 813528/813533 co-relation queries the response was YES. [2024-06-27 23:43:48,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70348 conditions, 7335 events. 4386/7335 cut-off events. For 813528/813533 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 50991 event pairs, 1572 based on Foata normal form. 5/7337 useless extension candidates. Maximal degree in co-relation 70195. Up to 6744 conditions per place. [2024-06-27 23:43:48,395 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 520 selfloop transitions, 70 changer transitions 0/595 dead transitions. [2024-06-27 23:43:48,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 9824 flow [2024-06-27 23:43:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:43:48,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:43:48,397 INFO L175 Difference]: Start difference. First operand has 338 places, 561 transitions, 7890 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:43:48,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 9824 flow [2024-06-27 23:43:51,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 595 transitions, 9622 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 23:43:51,168 INFO L231 Difference]: Finished difference. Result has 343 places, 574 transitions, 8213 flow [2024-06-27 23:43:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8213, PETRI_PLACES=343, PETRI_TRANSITIONS=574} [2024-06-27 23:43:51,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 23:43:51,169 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 574 transitions, 8213 flow [2024-06-27 23:43:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:51,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:51,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:51,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:43:51,170 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:51,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1873938293, now seen corresponding path program 7 times [2024-06-27 23:43:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871199258] [2024-06-27 23:43:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:51,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:52,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871199258] [2024-06-27 23:43:52,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871199258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:52,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:52,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327703238] [2024-06-27 23:43:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:52,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:52,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:43:52,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 574 transitions, 8213 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:52,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:52,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:43:52,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:54,371 INFO L124 PetriNetUnfolderBase]: 4353/7288 cut-off events. [2024-06-27 23:43:54,371 INFO L125 PetriNetUnfolderBase]: For 854014/854017 co-relation queries the response was YES. [2024-06-27 23:43:54,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71747 conditions, 7288 events. 4353/7288 cut-off events. For 854014/854017 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 50615 event pairs, 1196 based on Foata normal form. 1/7281 useless extension candidates. Maximal degree in co-relation 71591. Up to 6184 conditions per place. [2024-06-27 23:43:54,467 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 354 selfloop transitions, 224 changer transitions 0/605 dead transitions. [2024-06-27 23:43:54,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 605 transitions, 10247 flow [2024-06-27 23:43:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:43:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:43:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:43:54,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 23:43:54,469 INFO L175 Difference]: Start difference. First operand has 343 places, 574 transitions, 8213 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:43:54,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 605 transitions, 10247 flow [2024-06-27 23:43:56,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 605 transitions, 10068 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 23:43:56,988 INFO L231 Difference]: Finished difference. Result has 349 places, 584 transitions, 9061 flow [2024-06-27 23:43:56,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8034, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9061, PETRI_PLACES=349, PETRI_TRANSITIONS=584} [2024-06-27 23:43:56,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 23:43:56,989 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 584 transitions, 9061 flow [2024-06-27 23:43:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:56,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:56,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:43:56,989 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:56,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1873700771, now seen corresponding path program 3 times [2024-06-27 23:43:56,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:56,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408252959] [2024-06-27 23:43:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:58,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408252959] [2024-06-27 23:43:58,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408252959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:58,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:58,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:43:58,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390047283] [2024-06-27 23:43:58,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:58,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:43:58,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:43:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:43:58,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:43:58,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 584 transitions, 9061 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:58,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:58,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:43:58,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:00,176 INFO L124 PetriNetUnfolderBase]: 4420/7381 cut-off events. [2024-06-27 23:44:00,177 INFO L125 PetriNetUnfolderBase]: For 883265/883270 co-relation queries the response was YES. [2024-06-27 23:44:00,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73972 conditions, 7381 events. 4420/7381 cut-off events. For 883265/883270 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 51308 event pairs, 1580 based on Foata normal form. 3/7380 useless extension candidates. Maximal degree in co-relation 73813. Up to 6706 conditions per place. [2024-06-27 23:44:00,289 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 492 selfloop transitions, 110 changer transitions 0/607 dead transitions. [2024-06-27 23:44:00,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 607 transitions, 10609 flow [2024-06-27 23:44:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:44:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:44:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:44:00,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:44:00,291 INFO L175 Difference]: Start difference. First operand has 349 places, 584 transitions, 9061 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:44:00,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 607 transitions, 10609 flow [2024-06-27 23:44:03,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 607 transitions, 10155 flow, removed 120 selfloop flow, removed 5 redundant places. [2024-06-27 23:44:03,127 INFO L231 Difference]: Finished difference. Result has 354 places, 587 transitions, 8964 flow [2024-06-27 23:44:03,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8607, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8964, PETRI_PLACES=354, PETRI_TRANSITIONS=587} [2024-06-27 23:44:03,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 23:44:03,127 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 587 transitions, 8964 flow [2024-06-27 23:44:03,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:03,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:03,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:03,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:44:03,128 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:03,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1336565407, now seen corresponding path program 8 times [2024-06-27 23:44:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:03,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494130060] [2024-06-27 23:44:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:03,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:04,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:04,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494130060] [2024-06-27 23:44:04,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494130060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:04,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:04,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:04,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382921092] [2024-06-27 23:44:04,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:04,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:04,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:04,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 587 transitions, 8964 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:04,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:04,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:04,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:06,296 INFO L124 PetriNetUnfolderBase]: 4355/7293 cut-off events. [2024-06-27 23:44:06,296 INFO L125 PetriNetUnfolderBase]: For 880042/880042 co-relation queries the response was YES. [2024-06-27 23:44:06,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72895 conditions, 7293 events. 4355/7293 cut-off events. For 880042/880042 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 50708 event pairs, 1211 based on Foata normal form. 1/7288 useless extension candidates. Maximal degree in co-relation 72734. Up to 6638 conditions per place. [2024-06-27 23:44:06,404 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 513 selfloop transitions, 65 changer transitions 0/606 dead transitions. [2024-06-27 23:44:06,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 606 transitions, 10190 flow [2024-06-27 23:44:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:44:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:44:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:44:06,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:44:06,406 INFO L175 Difference]: Start difference. First operand has 354 places, 587 transitions, 8964 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:44:06,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 606 transitions, 10190 flow [2024-06-27 23:44:08,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 606 transitions, 9840 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-27 23:44:08,952 INFO L231 Difference]: Finished difference. Result has 356 places, 587 transitions, 8751 flow [2024-06-27 23:44:08,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8614, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8751, PETRI_PLACES=356, PETRI_TRANSITIONS=587} [2024-06-27 23:44:08,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 23:44:08,953 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 587 transitions, 8751 flow [2024-06-27 23:44:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:08,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:08,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:08,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:44:08,954 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:08,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash 699363871, now seen corresponding path program 1 times [2024-06-27 23:44:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655691969] [2024-06-27 23:44:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:10,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:10,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655691969] [2024-06-27 23:44:10,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655691969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:10,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:10,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:44:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102416321] [2024-06-27 23:44:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:10,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:44:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:44:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:44:10,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:44:10,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 587 transitions, 8751 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:10,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:10,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:44:10,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:12,185 INFO L124 PetriNetUnfolderBase]: 4236/7125 cut-off events. [2024-06-27 23:44:12,185 INFO L125 PetriNetUnfolderBase]: For 877621/877626 co-relation queries the response was YES. [2024-06-27 23:44:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71374 conditions, 7125 events. 4236/7125 cut-off events. For 877621/877626 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 49731 event pairs, 1196 based on Foata normal form. 3/7089 useless extension candidates. Maximal degree in co-relation 71212. Up to 6355 conditions per place. [2024-06-27 23:44:12,292 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 86 changer transitions 0/606 dead transitions. [2024-06-27 23:44:12,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 606 transitions, 9987 flow [2024-06-27 23:44:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:44:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:44:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:44:12,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:44:12,294 INFO L175 Difference]: Start difference. First operand has 356 places, 587 transitions, 8751 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:44:12,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 606 transitions, 9987 flow [2024-06-27 23:44:15,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 606 transitions, 9807 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 23:44:15,785 INFO L231 Difference]: Finished difference. Result has 357 places, 590 transitions, 8843 flow [2024-06-27 23:44:15,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8571, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8843, PETRI_PLACES=357, PETRI_TRANSITIONS=590} [2024-06-27 23:44:15,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-27 23:44:15,785 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 590 transitions, 8843 flow [2024-06-27 23:44:15,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:15,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:15,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:15,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:44:15,786 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:15,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1554113349, now seen corresponding path program 5 times [2024-06-27 23:44:15,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:15,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815735225] [2024-06-27 23:44:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:15,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:16,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:16,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815735225] [2024-06-27 23:44:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815735225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:16,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061635072] [2024-06-27 23:44:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:16,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:16,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 590 transitions, 8843 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:16,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:16,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:16,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:18,958 INFO L124 PetriNetUnfolderBase]: 4389/7352 cut-off events. [2024-06-27 23:44:18,958 INFO L125 PetriNetUnfolderBase]: For 909049/909049 co-relation queries the response was YES. [2024-06-27 23:44:19,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73914 conditions, 7352 events. 4389/7352 cut-off events. For 909049/909049 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 51233 event pairs, 1239 based on Foata normal form. 2/7342 useless extension candidates. Maximal degree in co-relation 73751. Up to 6643 conditions per place. [2024-06-27 23:44:19,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 541 selfloop transitions, 49 changer transitions 0/618 dead transitions. [2024-06-27 23:44:19,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 618 transitions, 10242 flow [2024-06-27 23:44:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:44:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:44:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:44:19,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:44:19,060 INFO L175 Difference]: Start difference. First operand has 357 places, 590 transitions, 8843 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:44:19,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 618 transitions, 10242 flow [2024-06-27 23:44:21,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 618 transitions, 9996 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:44:21,878 INFO L231 Difference]: Finished difference. Result has 359 places, 596 transitions, 8861 flow [2024-06-27 23:44:21,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8597, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8861, PETRI_PLACES=359, PETRI_TRANSITIONS=596} [2024-06-27 23:44:21,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 23:44:21,879 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 596 transitions, 8861 flow [2024-06-27 23:44:21,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:21,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:21,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:21,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:44:21,880 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:21,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1614392543, now seen corresponding path program 6 times [2024-06-27 23:44:21,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:21,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762997463] [2024-06-27 23:44:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762997463] [2024-06-27 23:44:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762997463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:23,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:23,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122095262] [2024-06-27 23:44:23,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:23,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:23,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:23,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:23,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 596 transitions, 8861 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:23,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:23,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:23,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:25,139 INFO L124 PetriNetUnfolderBase]: 4420/7398 cut-off events. [2024-06-27 23:44:25,139 INFO L125 PetriNetUnfolderBase]: For 926443/926443 co-relation queries the response was YES. [2024-06-27 23:44:25,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74482 conditions, 7398 events. 4420/7398 cut-off events. For 926443/926443 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 51488 event pairs, 1266 based on Foata normal form. 2/7385 useless extension candidates. Maximal degree in co-relation 74318. Up to 6739 conditions per place. [2024-06-27 23:44:25,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 544 selfloop transitions, 50 changer transitions 0/622 dead transitions. [2024-06-27 23:44:25,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 622 transitions, 10283 flow [2024-06-27 23:44:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:44:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:44:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:44:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:44:25,249 INFO L175 Difference]: Start difference. First operand has 359 places, 596 transitions, 8861 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:44:25,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 622 transitions, 10283 flow [2024-06-27 23:44:29,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 622 transitions, 10067 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 23:44:29,179 INFO L231 Difference]: Finished difference. Result has 361 places, 605 transitions, 8964 flow [2024-06-27 23:44:29,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8645, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8964, PETRI_PLACES=361, PETRI_TRANSITIONS=605} [2024-06-27 23:44:29,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 23:44:29,180 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 605 transitions, 8964 flow [2024-06-27 23:44:29,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:29,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:29,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:29,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:44:29,181 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:29,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1901279873, now seen corresponding path program 7 times [2024-06-27 23:44:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631090543] [2024-06-27 23:44:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:30,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:30,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631090543] [2024-06-27 23:44:30,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631090543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350746037] [2024-06-27 23:44:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:30,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:30,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:30,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:30,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 605 transitions, 8964 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:30,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:30,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:30,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:32,373 INFO L124 PetriNetUnfolderBase]: 4434/7415 cut-off events. [2024-06-27 23:44:32,374 INFO L125 PetriNetUnfolderBase]: For 941255/941255 co-relation queries the response was YES. [2024-06-27 23:44:32,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74833 conditions, 7415 events. 4434/7415 cut-off events. For 941255/941255 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 51545 event pairs, 1216 based on Foata normal form. 2/7405 useless extension candidates. Maximal degree in co-relation 74667. Up to 6754 conditions per place. [2024-06-27 23:44:32,490 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 537 selfloop transitions, 58 changer transitions 0/623 dead transitions. [2024-06-27 23:44:32,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 623 transitions, 10318 flow [2024-06-27 23:44:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:44:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:44:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:44:32,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:44:32,491 INFO L175 Difference]: Start difference. First operand has 361 places, 605 transitions, 8964 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:44:32,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 623 transitions, 10318 flow [2024-06-27 23:44:36,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 623 transitions, 10121 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 23:44:36,389 INFO L231 Difference]: Finished difference. Result has 364 places, 609 transitions, 9017 flow [2024-06-27 23:44:36,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8767, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9017, PETRI_PLACES=364, PETRI_TRANSITIONS=609} [2024-06-27 23:44:36,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 23:44:36,390 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 609 transitions, 9017 flow [2024-06-27 23:44:36,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:36,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:36,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:36,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:44:36,390 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:36,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash 420703879, now seen corresponding path program 9 times [2024-06-27 23:44:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:36,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359583221] [2024-06-27 23:44:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:37,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:37,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359583221] [2024-06-27 23:44:37,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359583221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:37,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:37,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015937715] [2024-06-27 23:44:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:37,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:37,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:37,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 609 transitions, 9017 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:37,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:37,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:37,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:39,668 INFO L124 PetriNetUnfolderBase]: 4461/7466 cut-off events. [2024-06-27 23:44:39,668 INFO L125 PetriNetUnfolderBase]: For 964153/964153 co-relation queries the response was YES. [2024-06-27 23:44:39,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75369 conditions, 7466 events. 4461/7466 cut-off events. For 964153/964153 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 52108 event pairs, 1254 based on Foata normal form. 4/7458 useless extension candidates. Maximal degree in co-relation 75202. Up to 6757 conditions per place. [2024-06-27 23:44:39,789 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 541 selfloop transitions, 74 changer transitions 0/643 dead transitions. [2024-06-27 23:44:39,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 643 transitions, 10716 flow [2024-06-27 23:44:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:44:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:44:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:44:39,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:44:39,791 INFO L175 Difference]: Start difference. First operand has 364 places, 609 transitions, 9017 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:44:39,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 643 transitions, 10716 flow [2024-06-27 23:44:43,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 643 transitions, 10434 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-27 23:44:43,920 INFO L231 Difference]: Finished difference. Result has 367 places, 625 transitions, 9353 flow [2024-06-27 23:44:43,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8735, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9353, PETRI_PLACES=367, PETRI_TRANSITIONS=625} [2024-06-27 23:44:43,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 23:44:43,926 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 625 transitions, 9353 flow [2024-06-27 23:44:43,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:43,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:43,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:43,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:44:43,927 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)] === [2024-06-27 23:44:43,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1614395519, now seen corresponding path program 10 times [2024-06-27 23:44:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:43,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100495257] [2024-06-27 23:44:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:45,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:45,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100495257] [2024-06-27 23:44:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100495257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:45,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:45,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269924437] [2024-06-27 23:44:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:45,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:45,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:45,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 625 transitions, 9353 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:45,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:45,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:45,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:47,333 INFO L124 PetriNetUnfolderBase]: 4478/7490 cut-off events. [2024-06-27 23:44:47,334 INFO L125 PetriNetUnfolderBase]: For 981543/981543 co-relation queries the response was YES. [2024-06-27 23:44:47,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76636 conditions, 7490 events. 4478/7490 cut-off events. For 981543/981543 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 52221 event pairs, 1252 based on Foata normal form. 1/7476 useless extension candidates. Maximal degree in co-relation 76469. Up to 6763 conditions per place. [2024-06-27 23:44:47,442 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 533 selfloop transitions, 92 changer transitions 0/653 dead transitions. [2024-06-27 23:44:47,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 653 transitions, 10860 flow [2024-06-27 23:44:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:44:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:44:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:44:47,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:44:47,443 INFO L175 Difference]: Start difference. First operand has 367 places, 625 transitions, 9353 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:44:47,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 653 transitions, 10860 flow [2024-06-27 23:44:51,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 653 transitions, 10475 flow, removed 132 selfloop flow, removed 7 redundant places. [2024-06-27 23:44:51,345 INFO L231 Difference]: Finished difference. Result has 370 places, 634 transitions, 9379 flow [2024-06-27 23:44:51,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9379, PETRI_PLACES=370, PETRI_TRANSITIONS=634} [2024-06-27 23:44:51,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 23:44:51,346 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 634 transitions, 9379 flow [2024-06-27 23:44:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:51,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:51,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:51,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:44:51,347 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)] === [2024-06-27 23:44:51,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1723972769, now seen corresponding path program 11 times [2024-06-27 23:44:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:51,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000687009] [2024-06-27 23:44:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:52,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:52,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000687009] [2024-06-27 23:44:52,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000687009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:52,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:52,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36970121] [2024-06-27 23:44:52,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:52,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:52,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:44:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 634 transitions, 9379 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:44:52,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:54,572 INFO L124 PetriNetUnfolderBase]: 4501/7515 cut-off events. [2024-06-27 23:44:54,572 INFO L125 PetriNetUnfolderBase]: For 1021895/1021898 co-relation queries the response was YES. [2024-06-27 23:44:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77774 conditions, 7515 events. 4501/7515 cut-off events. For 1021895/1021898 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 52315 event pairs, 1201 based on Foata normal form. 4/7501 useless extension candidates. Maximal degree in co-relation 77606. Up to 6537 conditions per place. [2024-06-27 23:44:54,690 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 490 selfloop transitions, 148 changer transitions 0/666 dead transitions. [2024-06-27 23:44:54,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 666 transitions, 11160 flow [2024-06-27 23:44:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:44:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:44:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 23:44:54,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 23:44:54,692 INFO L175 Difference]: Start difference. First operand has 370 places, 634 transitions, 9379 flow. Second operand 8 states and 164 transitions. [2024-06-27 23:44:54,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 666 transitions, 11160 flow [2024-06-27 23:44:58,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 666 transitions, 10856 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 23:44:58,477 INFO L231 Difference]: Finished difference. Result has 370 places, 645 transitions, 9806 flow [2024-06-27 23:44:58,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9075, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9806, PETRI_PLACES=370, PETRI_TRANSITIONS=645} [2024-06-27 23:44:58,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 23:44:58,478 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 645 transitions, 9806 flow [2024-06-27 23:44:58,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:58,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:58,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:58,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:44:58,478 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)] === [2024-06-27 23:44:58,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:58,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1724271671, now seen corresponding path program 4 times [2024-06-27 23:44:58,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:58,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812255320] [2024-06-27 23:44:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:58,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812255320] [2024-06-27 23:44:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812255320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:59,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:59,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:59,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393350898] [2024-06-27 23:44:59,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:59,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:59,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:59,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:44:59,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 645 transitions, 9806 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:59,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:59,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:44:59,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:01,747 INFO L124 PetriNetUnfolderBase]: 4588/7628 cut-off events. [2024-06-27 23:45:01,747 INFO L125 PetriNetUnfolderBase]: For 1053916/1053922 co-relation queries the response was YES. [2024-06-27 23:45:01,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79891 conditions, 7628 events. 4588/7628 cut-off events. For 1053916/1053922 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 52940 event pairs, 1591 based on Foata normal form. 6/7627 useless extension candidates. Maximal degree in co-relation 79722. Up to 6988 conditions per place. [2024-06-27 23:45:01,869 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 583 selfloop transitions, 87 changer transitions 0/675 dead transitions. [2024-06-27 23:45:01,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 675 transitions, 11558 flow [2024-06-27 23:45:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:45:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:45:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:45:01,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:45:01,871 INFO L175 Difference]: Start difference. First operand has 370 places, 645 transitions, 9806 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:45:01,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 675 transitions, 11558 flow [2024-06-27 23:45:05,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 675 transitions, 10957 flow, removed 161 selfloop flow, removed 6 redundant places. [2024-06-27 23:45:05,746 INFO L231 Difference]: Finished difference. Result has 373 places, 658 transitions, 9760 flow [2024-06-27 23:45:05,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9205, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9760, PETRI_PLACES=373, PETRI_TRANSITIONS=658} [2024-06-27 23:45:05,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 23:45:05,749 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 658 transitions, 9760 flow [2024-06-27 23:45:05,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:05,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:05,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:05,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:45:05,749 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)] === [2024-06-27 23:45:05,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1724271299, now seen corresponding path program 12 times [2024-06-27 23:45:05,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:05,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040173266] [2024-06-27 23:45:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:06,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:06,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040173266] [2024-06-27 23:45:06,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040173266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:06,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:06,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:06,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292202018] [2024-06-27 23:45:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:07,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:45:07,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 658 transitions, 9760 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:07,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:07,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:45:07,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:09,284 INFO L124 PetriNetUnfolderBase]: 4549/7590 cut-off events. [2024-06-27 23:45:09,284 INFO L125 PetriNetUnfolderBase]: For 1086501/1086504 co-relation queries the response was YES. [2024-06-27 23:45:09,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80557 conditions, 7590 events. 4549/7590 cut-off events. For 1086501/1086504 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 52915 event pairs, 1198 based on Foata normal form. 4/7576 useless extension candidates. Maximal degree in co-relation 80387. Up to 6539 conditions per place. [2024-06-27 23:45:09,403 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 190 changer transitions 0/688 dead transitions. [2024-06-27 23:45:09,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 688 transitions, 11588 flow [2024-06-27 23:45:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:45:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:45:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:45:09,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 23:45:09,405 INFO L175 Difference]: Start difference. First operand has 373 places, 658 transitions, 9760 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:45:09,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 688 transitions, 11588 flow [2024-06-27 23:45:13,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 688 transitions, 11199 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-27 23:45:13,246 INFO L231 Difference]: Finished difference. Result has 375 places, 669 transitions, 10203 flow [2024-06-27 23:45:13,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9371, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10203, PETRI_PLACES=375, PETRI_TRANSITIONS=669} [2024-06-27 23:45:13,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 23:45:13,247 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 669 transitions, 10203 flow [2024-06-27 23:45:13,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:13,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:13,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:13,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:45:13,248 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)] === [2024-06-27 23:45:13,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1724271485, now seen corresponding path program 4 times [2024-06-27 23:45:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:13,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738422387] [2024-06-27 23:45:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:14,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:14,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738422387] [2024-06-27 23:45:14,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738422387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:14,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:14,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:14,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207061576] [2024-06-27 23:45:14,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:45:14,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 669 transitions, 10203 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:14,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:14,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:45:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:16,821 INFO L124 PetriNetUnfolderBase]: 4564/7632 cut-off events. [2024-06-27 23:45:16,822 INFO L125 PetriNetUnfolderBase]: For 1112770/1112776 co-relation queries the response was YES. [2024-06-27 23:45:16,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82158 conditions, 7632 events. 4564/7632 cut-off events. For 1112770/1112776 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 53474 event pairs, 1553 based on Foata normal form. 4/7625 useless extension candidates. Maximal degree in co-relation 81987. Up to 6868 conditions per place. [2024-06-27 23:45:16,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 83 changer transitions 0/695 dead transitions. [2024-06-27 23:45:16,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 695 transitions, 11895 flow [2024-06-27 23:45:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:45:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:45:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:45:16,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 23:45:16,946 INFO L175 Difference]: Start difference. First operand has 375 places, 669 transitions, 10203 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:45:16,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 695 transitions, 11895 flow [2024-06-27 23:45:21,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 695 transitions, 11190 flow, removed 171 selfloop flow, removed 7 redundant places. [2024-06-27 23:45:21,058 INFO L231 Difference]: Finished difference. Result has 377 places, 678 transitions, 9984 flow [2024-06-27 23:45:21,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9498, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9984, PETRI_PLACES=377, PETRI_TRANSITIONS=678} [2024-06-27 23:45:21,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 23:45:21,059 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 678 transitions, 9984 flow [2024-06-27 23:45:21,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:21,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:21,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:21,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:45:21,060 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)] === [2024-06-27 23:45:21,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash 137866389, now seen corresponding path program 5 times [2024-06-27 23:45:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:21,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130455650] [2024-06-27 23:45:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:22,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130455650] [2024-06-27 23:45:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130455650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:22,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:22,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919993777] [2024-06-27 23:45:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:22,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:45:22,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 678 transitions, 9984 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:22,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:22,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:45:22,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:24,715 INFO L124 PetriNetUnfolderBase]: 4675/7769 cut-off events. [2024-06-27 23:45:24,716 INFO L125 PetriNetUnfolderBase]: For 1147850/1147856 co-relation queries the response was YES. [2024-06-27 23:45:24,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83794 conditions, 7769 events. 4675/7769 cut-off events. For 1147850/1147856 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 54076 event pairs, 1593 based on Foata normal form. 3/7765 useless extension candidates. Maximal degree in co-relation 83622. Up to 7046 conditions per place. [2024-06-27 23:45:24,834 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 587 selfloop transitions, 123 changer transitions 0/715 dead transitions. [2024-06-27 23:45:24,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 715 transitions, 12428 flow [2024-06-27 23:45:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:45:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:45:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:45:24,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:45:24,836 INFO L175 Difference]: Start difference. First operand has 377 places, 678 transitions, 9984 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:45:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 715 transitions, 12428 flow [2024-06-27 23:45:29,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 715 transitions, 12040 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-27 23:45:29,166 INFO L231 Difference]: Finished difference. Result has 380 places, 700 transitions, 10541 flow [2024-06-27 23:45:29,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9596, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10541, PETRI_PLACES=380, PETRI_TRANSITIONS=700} [2024-06-27 23:45:29,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 23:45:29,167 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 700 transitions, 10541 flow [2024-06-27 23:45:29,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:29,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:29,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:45:29,168 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)] === [2024-06-27 23:45:29,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1901403005, now seen corresponding path program 5 times [2024-06-27 23:45:29,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:29,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152939770] [2024-06-27 23:45:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:30,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:30,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152939770] [2024-06-27 23:45:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152939770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:30,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:30,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:30,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741347494] [2024-06-27 23:45:30,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:30,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:30,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:30,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:30,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:30,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:45:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 700 transitions, 10541 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:45:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:32,796 INFO L124 PetriNetUnfolderBase]: 4633/7734 cut-off events. [2024-06-27 23:45:32,796 INFO L125 PetriNetUnfolderBase]: For 1192982/1192988 co-relation queries the response was YES. [2024-06-27 23:45:32,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85109 conditions, 7734 events. 4633/7734 cut-off events. For 1192982/1192988 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 54207 event pairs, 1555 based on Foata normal form. 3/7726 useless extension candidates. Maximal degree in co-relation 84934. Up to 6900 conditions per place. [2024-06-27 23:45:32,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 572 selfloop transitions, 112 changer transitions 0/723 dead transitions. [2024-06-27 23:45:32,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 723 transitions, 12508 flow [2024-06-27 23:45:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:45:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:45:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:45:32,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:45:32,927 INFO L175 Difference]: Start difference. First operand has 380 places, 700 transitions, 10541 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:45:32,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 723 transitions, 12508 flow [2024-06-27 23:45:38,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 723 transitions, 12298 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 23:45:38,014 INFO L231 Difference]: Finished difference. Result has 386 places, 709 transitions, 10928 flow [2024-06-27 23:45:38,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10331, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10928, PETRI_PLACES=386, PETRI_TRANSITIONS=709} [2024-06-27 23:45:38,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 23:45:38,015 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 709 transitions, 10928 flow [2024-06-27 23:45:38,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:38,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:38,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:38,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:45:38,016 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)] === [2024-06-27 23:45:38,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1901402819, now seen corresponding path program 13 times [2024-06-27 23:45:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:38,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674373371] [2024-06-27 23:45:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:39,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:39,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674373371] [2024-06-27 23:45:39,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674373371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:39,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:39,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151159111] [2024-06-27 23:45:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:39,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:39,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:39,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:39,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:45:39,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 709 transitions, 10928 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:39,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:39,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:45:39,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:41,649 INFO L124 PetriNetUnfolderBase]: 4664/7770 cut-off events. [2024-06-27 23:45:41,649 INFO L125 PetriNetUnfolderBase]: For 1242220/1242226 co-relation queries the response was YES. [2024-06-27 23:45:41,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86943 conditions, 7770 events. 4664/7770 cut-off events. For 1242220/1242226 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 54281 event pairs, 1174 based on Foata normal form. 6/7764 useless extension candidates. Maximal degree in co-relation 86766. Up to 6840 conditions per place. [2024-06-27 23:45:41,768 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 541 selfloop transitions, 171 changer transitions 0/751 dead transitions. [2024-06-27 23:45:41,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 751 transitions, 13562 flow [2024-06-27 23:45:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:45:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:45:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 23:45:41,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 23:45:41,770 INFO L175 Difference]: Start difference. First operand has 386 places, 709 transitions, 10928 flow. Second operand 8 states and 157 transitions. [2024-06-27 23:45:41,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 751 transitions, 13562 flow [2024-06-27 23:45:46,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 751 transitions, 13322 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-27 23:45:46,516 INFO L231 Difference]: Finished difference. Result has 391 places, 736 transitions, 11948 flow [2024-06-27 23:45:46,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11948, PETRI_PLACES=391, PETRI_TRANSITIONS=736} [2024-06-27 23:45:46,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 23:45:46,517 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 736 transitions, 11948 flow [2024-06-27 23:45:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:46,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:46,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:45:46,518 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)] === [2024-06-27 23:45:46,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1901282849, now seen corresponding path program 14 times [2024-06-27 23:45:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:46,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142536513] [2024-06-27 23:45:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:47,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142536513] [2024-06-27 23:45:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142536513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:47,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:47,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388106839] [2024-06-27 23:45:47,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:47,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:47,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:45:47,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 736 transitions, 11948 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:47,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:47,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:45:47,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:50,144 INFO L124 PetriNetUnfolderBase]: 4661/7757 cut-off events. [2024-06-27 23:45:50,144 INFO L125 PetriNetUnfolderBase]: For 1265342/1265345 co-relation queries the response was YES. [2024-06-27 23:45:50,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87979 conditions, 7757 events. 4661/7757 cut-off events. For 1265342/1265345 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 54111 event pairs, 1225 based on Foata normal form. 4/7753 useless extension candidates. Maximal degree in co-relation 87798. Up to 7048 conditions per place. [2024-06-27 23:45:50,284 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 650 selfloop transitions, 60 changer transitions 0/749 dead transitions. [2024-06-27 23:45:50,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 749 transitions, 13412 flow [2024-06-27 23:45:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:45:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:45:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:45:50,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:45:50,286 INFO L175 Difference]: Start difference. First operand has 391 places, 736 transitions, 11948 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:45:50,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 749 transitions, 13412 flow [2024-06-27 23:45:55,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 749 transitions, 13063 flow, removed 156 selfloop flow, removed 2 redundant places. [2024-06-27 23:45:55,016 INFO L231 Difference]: Finished difference. Result has 397 places, 736 transitions, 11729 flow [2024-06-27 23:45:55,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11599, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11729, PETRI_PLACES=397, PETRI_TRANSITIONS=736} [2024-06-27 23:45:55,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 23:45:55,017 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 736 transitions, 11729 flow [2024-06-27 23:45:55,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:55,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:55,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:55,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:45:55,017 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)] === [2024-06-27 23:45:55,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1901640341, now seen corresponding path program 6 times [2024-06-27 23:45:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946769600] [2024-06-27 23:45:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:56,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:56,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946769600] [2024-06-27 23:45:56,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946769600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:56,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:56,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:45:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495291554] [2024-06-27 23:45:56,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:45:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:45:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:45:56,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:45:56,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 736 transitions, 11729 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:56,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:56,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:45:56,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:58,619 INFO L124 PetriNetUnfolderBase]: 4718/7839 cut-off events. [2024-06-27 23:45:58,619 INFO L125 PetriNetUnfolderBase]: For 1266673/1266679 co-relation queries the response was YES. [2024-06-27 23:45:58,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88122 conditions, 7839 events. 4718/7839 cut-off events. For 1266673/1266679 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 54666 event pairs, 1585 based on Foata normal form. 5/7838 useless extension candidates. Maximal degree in co-relation 87939. Up to 7204 conditions per place. [2024-06-27 23:45:58,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 659 selfloop transitions, 90 changer transitions 0/754 dead transitions. [2024-06-27 23:45:58,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 754 transitions, 13573 flow [2024-06-27 23:45:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:45:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:45:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:45:58,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:45:58,745 INFO L175 Difference]: Start difference. First operand has 397 places, 736 transitions, 11729 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:45:58,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 754 transitions, 13573 flow [2024-06-27 23:46:03,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 754 transitions, 13327 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:03,251 INFO L231 Difference]: Finished difference. Result has 400 places, 740 transitions, 11807 flow [2024-06-27 23:46:03,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11483, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11807, PETRI_PLACES=400, PETRI_TRANSITIONS=740} [2024-06-27 23:46:03,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 23:46:03,252 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 740 transitions, 11807 flow [2024-06-27 23:46:03,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:03,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:03,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:03,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:46:03,253 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)] === [2024-06-27 23:46:03,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1249322367, now seen corresponding path program 8 times [2024-06-27 23:46:03,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:03,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336731213] [2024-06-27 23:46:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:03,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336731213] [2024-06-27 23:46:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336731213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:04,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359725294] [2024-06-27 23:46:04,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:04,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:04,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 740 transitions, 11807 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:04,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:04,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:04,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:06,795 INFO L124 PetriNetUnfolderBase]: 4653/7748 cut-off events. [2024-06-27 23:46:06,796 INFO L125 PetriNetUnfolderBase]: For 1284996/1284999 co-relation queries the response was YES. [2024-06-27 23:46:06,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87608 conditions, 7748 events. 4653/7748 cut-off events. For 1284996/1284999 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 54046 event pairs, 1227 based on Foata normal form. 5/7740 useless extension candidates. Maximal degree in co-relation 87423. Up to 7014 conditions per place. [2024-06-27 23:46:06,934 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 636 selfloop transitions, 76 changer transitions 0/753 dead transitions. [2024-06-27 23:46:06,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 753 transitions, 13395 flow [2024-06-27 23:46:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 23:46:06,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:46:06,936 INFO L175 Difference]: Start difference. First operand has 400 places, 740 transitions, 11807 flow. Second operand 8 states and 147 transitions. [2024-06-27 23:46:06,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 753 transitions, 13395 flow [2024-06-27 23:46:12,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 753 transitions, 13207 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:12,197 INFO L231 Difference]: Finished difference. Result has 401 places, 742 transitions, 11908 flow [2024-06-27 23:46:12,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11619, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11908, PETRI_PLACES=401, PETRI_TRANSITIONS=742} [2024-06-27 23:46:12,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 23:46:12,198 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 742 transitions, 11908 flow [2024-06-27 23:46:12,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:12,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:12,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:12,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:46:12,199 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)] === [2024-06-27 23:46:12,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 148959949, now seen corresponding path program 15 times [2024-06-27 23:46:12,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:12,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127479879] [2024-06-27 23:46:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:12,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127479879] [2024-06-27 23:46:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127479879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:13,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:13,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:13,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632146247] [2024-06-27 23:46:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:13,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:13,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:13,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:13,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:13,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:13,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 742 transitions, 11908 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:13,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:13,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:13,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:15,879 INFO L124 PetriNetUnfolderBase]: 4673/7778 cut-off events. [2024-06-27 23:46:15,879 INFO L125 PetriNetUnfolderBase]: For 1322584/1322584 co-relation queries the response was YES. [2024-06-27 23:46:15,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88538 conditions, 7778 events. 4673/7778 cut-off events. For 1322584/1322584 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 54256 event pairs, 1151 based on Foata normal form. 4/7765 useless extension candidates. Maximal degree in co-relation 88353. Up to 6750 conditions per place. [2024-06-27 23:46:16,015 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 581 selfloop transitions, 153 changer transitions 0/775 dead transitions. [2024-06-27 23:46:16,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 775 transitions, 14161 flow [2024-06-27 23:46:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:46:16,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:46:16,017 INFO L175 Difference]: Start difference. First operand has 401 places, 742 transitions, 11908 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:46:16,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 775 transitions, 14161 flow [2024-06-27 23:46:20,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 775 transitions, 13884 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 23:46:20,729 INFO L231 Difference]: Finished difference. Result has 405 places, 754 transitions, 12647 flow [2024-06-27 23:46:20,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11631, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12647, PETRI_PLACES=405, PETRI_TRANSITIONS=754} [2024-06-27 23:46:20,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 23:46:20,730 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 754 transitions, 12647 flow [2024-06-27 23:46:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:20,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:20,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:20,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:46:20,731 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)] === [2024-06-27 23:46:20,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash 148970365, now seen corresponding path program 6 times [2024-06-27 23:46:20,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:20,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863539299] [2024-06-27 23:46:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:22,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:22,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863539299] [2024-06-27 23:46:22,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863539299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:22,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658821741] [2024-06-27 23:46:22,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:22,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 754 transitions, 12647 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:22,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:22,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:24,546 INFO L124 PetriNetUnfolderBase]: 4665/7783 cut-off events. [2024-06-27 23:46:24,547 INFO L125 PetriNetUnfolderBase]: For 1326727/1326736 co-relation queries the response was YES. [2024-06-27 23:46:24,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89133 conditions, 7783 events. 4665/7783 cut-off events. For 1326727/1326736 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 54560 event pairs, 1541 based on Foata normal form. 9/7785 useless extension candidates. Maximal degree in co-relation 88947. Up to 6996 conditions per place. [2024-06-27 23:46:24,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 655 selfloop transitions, 75 changer transitions 0/771 dead transitions. [2024-06-27 23:46:24,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 771 transitions, 14193 flow [2024-06-27 23:46:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:46:24,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:46:24,680 INFO L175 Difference]: Start difference. First operand has 405 places, 754 transitions, 12647 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:46:24,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 771 transitions, 14193 flow [2024-06-27 23:46:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 771 transitions, 13175 flow, removed 365 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:29,438 INFO L231 Difference]: Finished difference. Result has 407 places, 754 transitions, 11789 flow [2024-06-27 23:46:29,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11629, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11789, PETRI_PLACES=407, PETRI_TRANSITIONS=754} [2024-06-27 23:46:29,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 23:46:29,439 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 754 transitions, 11789 flow [2024-06-27 23:46:29,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:29,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:29,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:29,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:46:29,440 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)] === [2024-06-27 23:46:29,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 491269141, now seen corresponding path program 7 times [2024-06-27 23:46:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:29,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852613782] [2024-06-27 23:46:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852613782] [2024-06-27 23:46:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852613782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:30,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482385966] [2024-06-27 23:46:30,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:30,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:30,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 754 transitions, 11789 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:30,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:30,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:30,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:32,928 INFO L124 PetriNetUnfolderBase]: 4715/7832 cut-off events. [2024-06-27 23:46:32,929 INFO L125 PetriNetUnfolderBase]: For 1316829/1316835 co-relation queries the response was YES. [2024-06-27 23:46:33,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88070 conditions, 7832 events. 4715/7832 cut-off events. For 1316829/1316835 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 54651 event pairs, 1579 based on Foata normal form. 8/7833 useless extension candidates. Maximal degree in co-relation 87883. Up to 7173 conditions per place. [2024-06-27 23:46:33,073 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 687 selfloop transitions, 81 changer transitions 0/773 dead transitions. [2024-06-27 23:46:33,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 773 transitions, 13484 flow [2024-06-27 23:46:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:46:33,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:46:33,074 INFO L175 Difference]: Start difference. First operand has 407 places, 754 transitions, 11789 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:46:33,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 773 transitions, 13484 flow [2024-06-27 23:46:39,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 773 transitions, 12940 flow, removed 171 selfloop flow, removed 8 redundant places. [2024-06-27 23:46:39,078 INFO L231 Difference]: Finished difference. Result has 408 places, 756 transitions, 11502 flow [2024-06-27 23:46:39,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11287, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11502, PETRI_PLACES=408, PETRI_TRANSITIONS=756} [2024-06-27 23:46:39,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-27 23:46:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 756 transitions, 11502 flow [2024-06-27 23:46:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:46:39,079 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)] === [2024-06-27 23:46:39,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash 148970179, now seen corresponding path program 16 times [2024-06-27 23:46:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309126654] [2024-06-27 23:46:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:40,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309126654] [2024-06-27 23:46:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309126654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:40,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:40,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:40,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136733430] [2024-06-27 23:46:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:40,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:40,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:40,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:40,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 756 transitions, 11502 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:40,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:40,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:42,654 INFO L124 PetriNetUnfolderBase]: 4657/7763 cut-off events. [2024-06-27 23:46:42,655 INFO L125 PetriNetUnfolderBase]: For 1330195/1330198 co-relation queries the response was YES. [2024-06-27 23:46:42,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87469 conditions, 7763 events. 4657/7763 cut-off events. For 1330195/1330198 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 54218 event pairs, 1148 based on Foata normal form. 7/7757 useless extension candidates. Maximal degree in co-relation 87281. Up to 6708 conditions per place. [2024-06-27 23:46:42,788 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 569 selfloop transitions, 171 changer transitions 0/781 dead transitions. [2024-06-27 23:46:42,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 781 transitions, 13434 flow [2024-06-27 23:46:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:46:42,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:46:42,790 INFO L175 Difference]: Start difference. First operand has 408 places, 756 transitions, 11502 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:46:42,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 781 transitions, 13434 flow [2024-06-27 23:46:48,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 781 transitions, 13064 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:48,671 INFO L231 Difference]: Finished difference. Result has 410 places, 762 transitions, 11843 flow [2024-06-27 23:46:48,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11843, PETRI_PLACES=410, PETRI_TRANSITIONS=762} [2024-06-27 23:46:48,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 23:46:48,672 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 762 transitions, 11843 flow [2024-06-27 23:46:48,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:48,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:48,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:46:48,672 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)] === [2024-06-27 23:46:48,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1097399831, now seen corresponding path program 7 times [2024-06-27 23:46:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914774950] [2024-06-27 23:46:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:50,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:50,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914774950] [2024-06-27 23:46:50,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914774950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:50,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:50,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994050090] [2024-06-27 23:46:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:50,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:50,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 762 transitions, 11843 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:50,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:50,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:50,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:52,477 INFO L124 PetriNetUnfolderBase]: 4672/7804 cut-off events. [2024-06-27 23:46:52,477 INFO L125 PetriNetUnfolderBase]: For 1351932/1351941 co-relation queries the response was YES. [2024-06-27 23:46:52,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89073 conditions, 7804 events. 4672/7804 cut-off events. For 1351932/1351941 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 54853 event pairs, 1540 based on Foata normal form. 8/7805 useless extension candidates. Maximal degree in co-relation 88884. Up to 6950 conditions per place. [2024-06-27 23:46:52,623 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 613 selfloop transitions, 128 changer transitions 0/782 dead transitions. [2024-06-27 23:46:52,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 782 transitions, 13971 flow [2024-06-27 23:46:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:46:52,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:46:52,625 INFO L175 Difference]: Start difference. First operand has 410 places, 762 transitions, 11843 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:46:52,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 782 transitions, 13971 flow [2024-06-27 23:46:57,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 782 transitions, 13157 flow, removed 244 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:57,952 INFO L231 Difference]: Finished difference. Result has 412 places, 768 transitions, 11669 flow [2024-06-27 23:46:57,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11029, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11669, PETRI_PLACES=412, PETRI_TRANSITIONS=768} [2024-06-27 23:46:57,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 23:46:57,953 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 768 transitions, 11669 flow [2024-06-27 23:46:57,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:57,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:57,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:57,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:46:57,953 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)] === [2024-06-27 23:46:57,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 503649301, now seen corresponding path program 8 times [2024-06-27 23:46:57,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:57,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200456917] [2024-06-27 23:46:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:59,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200456917] [2024-06-27 23:46:59,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200456917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:59,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116861007] [2024-06-27 23:46:59,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:59,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:59,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:59,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:59,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 768 transitions, 11669 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:59,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:59,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:59,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:01,621 INFO L124 PetriNetUnfolderBase]: 4745/7879 cut-off events. [2024-06-27 23:47:01,621 INFO L125 PetriNetUnfolderBase]: For 1381877/1381883 co-relation queries the response was YES. [2024-06-27 23:47:01,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89979 conditions, 7879 events. 4745/7879 cut-off events. For 1381877/1381883 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 54958 event pairs, 1583 based on Foata normal form. 5/7877 useless extension candidates. Maximal degree in co-relation 89789. Up to 7253 conditions per place. [2024-06-27 23:47:01,748 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 697 selfloop transitions, 86 changer transitions 0/788 dead transitions. [2024-06-27 23:47:01,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 788 transitions, 13779 flow [2024-06-27 23:47:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:47:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:47:01,749 INFO L175 Difference]: Start difference. First operand has 412 places, 768 transitions, 11669 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:47:01,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 788 transitions, 13779 flow [2024-06-27 23:47:07,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 788 transitions, 13437 flow, removed 109 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:07,601 INFO L231 Difference]: Finished difference. Result has 416 places, 774 transitions, 11779 flow [2024-06-27 23:47:07,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11327, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11779, PETRI_PLACES=416, PETRI_TRANSITIONS=774} [2024-06-27 23:47:07,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 23:47:07,602 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 774 transitions, 11779 flow [2024-06-27 23:47:07,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:07,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:07,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:07,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:47:07,603 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)] === [2024-06-27 23:47:07,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1097636981, now seen corresponding path program 8 times [2024-06-27 23:47:07,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:07,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438946711] [2024-06-27 23:47:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:07,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:08,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438946711] [2024-06-27 23:47:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438946711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:08,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:08,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619587296] [2024-06-27 23:47:08,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:09,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:09,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 774 transitions, 11779 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:09,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:09,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:09,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:11,484 INFO L124 PetriNetUnfolderBase]: 4682/7816 cut-off events. [2024-06-27 23:47:11,484 INFO L125 PetriNetUnfolderBase]: For 1401139/1401145 co-relation queries the response was YES. [2024-06-27 23:47:11,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89971 conditions, 7816 events. 4682/7816 cut-off events. For 1401139/1401145 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54865 event pairs, 1540 based on Foata normal form. 5/7810 useless extension candidates. Maximal degree in co-relation 89779. Up to 6960 conditions per place. [2024-06-27 23:47:11,632 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 621 selfloop transitions, 123 changer transitions 0/787 dead transitions. [2024-06-27 23:47:11,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 787 transitions, 13319 flow [2024-06-27 23:47:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:47:11,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:47:11,633 INFO L175 Difference]: Start difference. First operand has 416 places, 774 transitions, 11779 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:47:11,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 787 transitions, 13319 flow [2024-06-27 23:47:17,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 787 transitions, 13036 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-06-27 23:47:17,319 INFO L231 Difference]: Finished difference. Result has 422 places, 774 transitions, 11748 flow [2024-06-27 23:47:17,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11496, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11748, PETRI_PLACES=422, PETRI_TRANSITIONS=774} [2024-06-27 23:47:17,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 23:47:17,320 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 774 transitions, 11748 flow [2024-06-27 23:47:17,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:17,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:17,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:47:17,321 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)] === [2024-06-27 23:47:17,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash 159147541, now seen corresponding path program 9 times [2024-06-27 23:47:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:17,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483192285] [2024-06-27 23:47:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:18,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:18,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483192285] [2024-06-27 23:47:18,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483192285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:18,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:18,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63227404] [2024-06-27 23:47:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:18,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:18,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 774 transitions, 11748 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:18,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:18,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:18,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:20,982 INFO L124 PetriNetUnfolderBase]: 4752/7894 cut-off events. [2024-06-27 23:47:20,982 INFO L125 PetriNetUnfolderBase]: For 1422536/1422542 co-relation queries the response was YES. [2024-06-27 23:47:21,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90842 conditions, 7894 events. 4752/7894 cut-off events. For 1422536/1422542 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 55124 event pairs, 1577 based on Foata normal form. 6/7893 useless extension candidates. Maximal degree in co-relation 90648. Up to 7146 conditions per place. [2024-06-27 23:47:21,129 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 650 selfloop transitions, 140 changer transitions 0/795 dead transitions. [2024-06-27 23:47:21,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 795 transitions, 14116 flow [2024-06-27 23:47:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:47:21,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:47:21,130 INFO L175 Difference]: Start difference. First operand has 422 places, 774 transitions, 11748 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:47:21,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 795 transitions, 14116 flow [2024-06-27 23:47:26,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 795 transitions, 13752 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 23:47:26,510 INFO L231 Difference]: Finished difference. Result has 423 places, 780 transitions, 11960 flow [2024-06-27 23:47:26,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11384, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11960, PETRI_PLACES=423, PETRI_TRANSITIONS=780} [2024-06-27 23:47:26,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-27 23:47:26,510 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 780 transitions, 11960 flow [2024-06-27 23:47:26,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:26,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:26,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:26,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:47:26,511 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)] === [2024-06-27 23:47:26,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash 712109703, now seen corresponding path program 17 times [2024-06-27 23:47:26,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:26,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430404639] [2024-06-27 23:47:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:26,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:27,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430404639] [2024-06-27 23:47:27,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430404639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:27,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:27,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:27,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372230994] [2024-06-27 23:47:27,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:27,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:27,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:27,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:27,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 780 transitions, 11960 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:27,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:27,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:27,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:30,022 INFO L124 PetriNetUnfolderBase]: 4702/7832 cut-off events. [2024-06-27 23:47:30,022 INFO L125 PetriNetUnfolderBase]: For 1467475/1467475 co-relation queries the response was YES. [2024-06-27 23:47:30,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91554 conditions, 7832 events. 4702/7832 cut-off events. For 1467475/1467475 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 54752 event pairs, 1148 based on Foata normal form. 2/7817 useless extension candidates. Maximal degree in co-relation 91359. Up to 6627 conditions per place. [2024-06-27 23:47:30,157 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 272 changer transitions 0/798 dead transitions. [2024-06-27 23:47:30,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 798 transitions, 14006 flow [2024-06-27 23:47:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:47:30,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:47:30,159 INFO L175 Difference]: Start difference. First operand has 423 places, 780 transitions, 11960 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:47:30,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 798 transitions, 14006 flow [2024-06-27 23:47:35,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 798 transitions, 13716 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:35,707 INFO L231 Difference]: Finished difference. Result has 428 places, 784 transitions, 12488 flow [2024-06-27 23:47:35,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11670, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12488, PETRI_PLACES=428, PETRI_TRANSITIONS=784} [2024-06-27 23:47:35,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 23:47:35,708 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 784 transitions, 12488 flow [2024-06-27 23:47:35,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:35,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:35,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:47:35,709 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)] === [2024-06-27 23:47:35,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash -849464589, now seen corresponding path program 10 times [2024-06-27 23:47:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:35,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009129451] [2024-06-27 23:47:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:37,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009129451] [2024-06-27 23:47:37,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009129451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:37,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:37,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:37,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814705551] [2024-06-27 23:47:37,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:37,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:37,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 784 transitions, 12488 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:37,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:37,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:37,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:39,571 INFO L124 PetriNetUnfolderBase]: 4775/7932 cut-off events. [2024-06-27 23:47:39,571 INFO L125 PetriNetUnfolderBase]: For 1508681/1508690 co-relation queries the response was YES. [2024-06-27 23:47:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94041 conditions, 7932 events. 4775/7932 cut-off events. For 1508681/1508690 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 55530 event pairs, 1604 based on Foata normal form. 5/7922 useless extension candidates. Maximal degree in co-relation 93844. Up to 7086 conditions per place. [2024-06-27 23:47:39,724 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 586 selfloop transitions, 218 changer transitions 0/809 dead transitions. [2024-06-27 23:47:39,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 809 transitions, 15058 flow [2024-06-27 23:47:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:47:39,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:47:39,726 INFO L175 Difference]: Start difference. First operand has 428 places, 784 transitions, 12488 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:47:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 809 transitions, 15058 flow [2024-06-27 23:47:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 809 transitions, 14441 flow, removed 127 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:46,444 INFO L231 Difference]: Finished difference. Result has 433 places, 796 transitions, 12907 flow [2024-06-27 23:47:46,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11871, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12907, PETRI_PLACES=433, PETRI_TRANSITIONS=796} [2024-06-27 23:47:46,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 23:47:46,445 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 796 transitions, 12907 flow [2024-06-27 23:47:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:46,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:46,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:46,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:47:46,446 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)] === [2024-06-27 23:47:46,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:46,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2038372011, now seen corresponding path program 11 times [2024-06-27 23:47:46,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:46,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129394117] [2024-06-27 23:47:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:46,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:47,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:47,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129394117] [2024-06-27 23:47:47,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129394117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:47,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:47,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278194068] [2024-06-27 23:47:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:47,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:47,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:47,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:47,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 796 transitions, 12907 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:47,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:47,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:47,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:50,426 INFO L124 PetriNetUnfolderBase]: 4788/7951 cut-off events. [2024-06-27 23:47:50,427 INFO L125 PetriNetUnfolderBase]: For 1537430/1537439 co-relation queries the response was YES. [2024-06-27 23:47:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94913 conditions, 7951 events. 4788/7951 cut-off events. For 1537430/1537439 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 55635 event pairs, 1610 based on Foata normal form. 5/7941 useless extension candidates. Maximal degree in co-relation 94713. Up to 7101 conditions per place. [2024-06-27 23:47:50,566 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 585 selfloop transitions, 225 changer transitions 0/815 dead transitions. [2024-06-27 23:47:50,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 815 transitions, 15345 flow [2024-06-27 23:47:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:47:50,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:47:50,576 INFO L175 Difference]: Start difference. First operand has 433 places, 796 transitions, 12907 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:47:50,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 815 transitions, 15345 flow [2024-06-27 23:47:58,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 815 transitions, 14883 flow, removed 158 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:58,430 INFO L231 Difference]: Finished difference. Result has 439 places, 803 transitions, 13327 flow [2024-06-27 23:47:58,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12521, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13327, PETRI_PLACES=439, PETRI_TRANSITIONS=803} [2024-06-27 23:47:58,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-27 23:47:58,430 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 803 transitions, 13327 flow [2024-06-27 23:47:58,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:58,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:58,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:58,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:47:58,431 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)] === [2024-06-27 23:47:58,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1072067715, now seen corresponding path program 9 times [2024-06-27 23:47:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:58,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500699754] [2024-06-27 23:47:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500699754] [2024-06-27 23:47:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500699754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:59,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:59,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292432863] [2024-06-27 23:47:59,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:59,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:59,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:59,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 803 transitions, 13327 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:59,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:02,244 INFO L124 PetriNetUnfolderBase]: 4746/7918 cut-off events. [2024-06-27 23:48:02,244 INFO L125 PetriNetUnfolderBase]: For 1538569/1538578 co-relation queries the response was YES. [2024-06-27 23:48:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94416 conditions, 7918 events. 4746/7918 cut-off events. For 1538569/1538578 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 55791 event pairs, 1572 based on Foata normal form. 5/7908 useless extension candidates. Maximal degree in co-relation 94213. Up to 6977 conditions per place. [2024-06-27 23:48:02,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 609 selfloop transitions, 163 changer transitions 0/824 dead transitions. [2024-06-27 23:48:02,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 824 transitions, 15971 flow [2024-06-27 23:48:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:48:02,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:48:02,401 INFO L175 Difference]: Start difference. First operand has 439 places, 803 transitions, 13327 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:48:02,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 824 transitions, 15971 flow [2024-06-27 23:48:09,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 824 transitions, 15551 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:09,205 INFO L231 Difference]: Finished difference. Result has 442 places, 812 transitions, 13839 flow [2024-06-27 23:48:09,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12907, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13839, PETRI_PLACES=442, PETRI_TRANSITIONS=812} [2024-06-27 23:48:09,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-27 23:48:09,221 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 812 transitions, 13839 flow [2024-06-27 23:48:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:09,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:09,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:48:09,221 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)] === [2024-06-27 23:48:09,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1072067529, now seen corresponding path program 12 times [2024-06-27 23:48:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143772117] [2024-06-27 23:48:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:09,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143772117] [2024-06-27 23:48:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143772117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:10,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:10,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514019879] [2024-06-27 23:48:10,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:10,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:10,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:10,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:10,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:10,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:10,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 812 transitions, 13839 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:10,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:10,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:10,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:13,070 INFO L124 PetriNetUnfolderBase]: 4806/7974 cut-off events. [2024-06-27 23:48:13,070 INFO L125 PetriNetUnfolderBase]: For 1568527/1568536 co-relation queries the response was YES. [2024-06-27 23:48:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95362 conditions, 7974 events. 4806/7974 cut-off events. For 1568527/1568536 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 55810 event pairs, 1607 based on Foata normal form. 5/7964 useless extension candidates. Maximal degree in co-relation 95158. Up to 7125 conditions per place. [2024-06-27 23:48:13,210 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 614 selfloop transitions, 211 changer transitions 0/830 dead transitions. [2024-06-27 23:48:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 830 transitions, 16454 flow [2024-06-27 23:48:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:48:13,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:48:13,212 INFO L175 Difference]: Start difference. First operand has 442 places, 812 transitions, 13839 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:48:13,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 830 transitions, 16454 flow [2024-06-27 23:48:21,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 830 transitions, 15916 flow, removed 145 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:21,661 INFO L231 Difference]: Finished difference. Result has 447 places, 817 transitions, 13946 flow [2024-06-27 23:48:21,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13301, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13946, PETRI_PLACES=447, PETRI_TRANSITIONS=817} [2024-06-27 23:48:21,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-27 23:48:21,661 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 817 transitions, 13946 flow [2024-06-27 23:48:21,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:21,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:21,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:21,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:48:21,662 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)] === [2024-06-27 23:48:21,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1071651819, now seen corresponding path program 13 times [2024-06-27 23:48:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:21,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160689899] [2024-06-27 23:48:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:21,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160689899] [2024-06-27 23:48:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160689899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:23,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:23,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518168832] [2024-06-27 23:48:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:23,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:23,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 817 transitions, 13946 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:23,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:23,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:23,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:25,464 INFO L124 PetriNetUnfolderBase]: 4803/7972 cut-off events. [2024-06-27 23:48:25,464 INFO L125 PetriNetUnfolderBase]: For 1545475/1545484 co-relation queries the response was YES. [2024-06-27 23:48:25,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94124 conditions, 7972 events. 4803/7972 cut-off events. For 1545475/1545484 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 55755 event pairs, 1607 based on Foata normal form. 5/7962 useless extension candidates. Maximal degree in co-relation 93919. Up to 7122 conditions per place. [2024-06-27 23:48:25,609 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 611 selfloop transitions, 214 changer transitions 0/830 dead transitions. [2024-06-27 23:48:25,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 830 transitions, 16350 flow [2024-06-27 23:48:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:48:25,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:48:25,610 INFO L175 Difference]: Start difference. First operand has 447 places, 817 transitions, 13946 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:48:25,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 830 transitions, 16350 flow [2024-06-27 23:48:34,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 830 transitions, 15905 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:34,210 INFO L231 Difference]: Finished difference. Result has 452 places, 817 transitions, 13935 flow [2024-06-27 23:48:34,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13501, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13935, PETRI_PLACES=452, PETRI_TRANSITIONS=817} [2024-06-27 23:48:34,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-27 23:48:34,211 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 817 transitions, 13935 flow [2024-06-27 23:48:34,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:34,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:34,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:34,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:48:34,212 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)] === [2024-06-27 23:48:34,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1072067901, now seen corresponding path program 18 times [2024-06-27 23:48:34,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:34,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069006608] [2024-06-27 23:48:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:34,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:35,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:35,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069006608] [2024-06-27 23:48:35,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069006608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:35,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:35,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:35,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513334512] [2024-06-27 23:48:35,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:35,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:35,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:35,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:35,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:35,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:35,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 817 transitions, 13935 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:35,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:35,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:35,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:37,931 INFO L124 PetriNetUnfolderBase]: 4753/7911 cut-off events. [2024-06-27 23:48:37,932 INFO L125 PetriNetUnfolderBase]: For 1576344/1576347 co-relation queries the response was YES. [2024-06-27 23:48:38,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94071 conditions, 7911 events. 4753/7911 cut-off events. For 1576344/1576347 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 55462 event pairs, 1244 based on Foata normal form. 1/7881 useless extension candidates. Maximal degree in co-relation 93865. Up to 6577 conditions per place. [2024-06-27 23:48:38,072 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 354 changer transitions 0/835 dead transitions. [2024-06-27 23:48:38,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 835 transitions, 16409 flow [2024-06-27 23:48:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:48:38,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 23:48:38,074 INFO L175 Difference]: Start difference. First operand has 452 places, 817 transitions, 13935 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:48:38,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 835 transitions, 16409 flow [2024-06-27 23:48:46,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 835 transitions, 15993 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:48:46,332 INFO L231 Difference]: Finished difference. Result has 453 places, 823 transitions, 14631 flow [2024-06-27 23:48:46,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13519, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14631, PETRI_PLACES=453, PETRI_TRANSITIONS=823} [2024-06-27 23:48:46,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-27 23:48:46,333 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 823 transitions, 14631 flow [2024-06-27 23:48:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:46,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:46,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:48:46,334 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)] === [2024-06-27 23:48:46,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1071830565, now seen corresponding path program 10 times [2024-06-27 23:48:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352299766] [2024-06-27 23:48:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:46,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:48,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:48,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352299766] [2024-06-27 23:48:48,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352299766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:48,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:48,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:48,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377691820] [2024-06-27 23:48:48,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:48,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:48,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:48,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:48,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:48,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 823 transitions, 14631 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:48,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:48,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:48,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:50,758 INFO L124 PetriNetUnfolderBase]: 4749/7918 cut-off events. [2024-06-27 23:48:50,759 INFO L125 PetriNetUnfolderBase]: For 1595129/1595138 co-relation queries the response was YES. [2024-06-27 23:48:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94982 conditions, 7918 events. 4749/7918 cut-off events. For 1595129/1595138 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 55731 event pairs, 1572 based on Foata normal form. 5/7908 useless extension candidates. Maximal degree in co-relation 94775. Up to 6982 conditions per place. [2024-06-27 23:48:50,902 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 614 selfloop transitions, 167 changer transitions 0/834 dead transitions. [2024-06-27 23:48:50,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 834 transitions, 16471 flow [2024-06-27 23:48:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:48:50,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:48:50,903 INFO L175 Difference]: Start difference. First operand has 453 places, 823 transitions, 14631 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:48:50,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 834 transitions, 16471 flow [2024-06-27 23:48:56,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 834 transitions, 15783 flow, removed 163 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:56,977 INFO L231 Difference]: Finished difference. Result has 458 places, 823 transitions, 14283 flow [2024-06-27 23:48:56,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13943, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14283, PETRI_PLACES=458, PETRI_TRANSITIONS=823} [2024-06-27 23:48:56,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-27 23:48:56,978 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 823 transitions, 14283 flow [2024-06-27 23:48:56,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:56,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:56,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:48:56,978 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)] === [2024-06-27 23:48:56,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -938431773, now seen corresponding path program 19 times [2024-06-27 23:48:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327293353] [2024-06-27 23:48:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:58,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327293353] [2024-06-27 23:48:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327293353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:58,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:58,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471850587] [2024-06-27 23:48:58,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:58,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:58,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:58,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:58,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 823 transitions, 14283 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:58,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:58,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:58,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:00,929 INFO L124 PetriNetUnfolderBase]: 4755/7914 cut-off events. [2024-06-27 23:49:00,929 INFO L125 PetriNetUnfolderBase]: For 1616570/1616570 co-relation queries the response was YES. [2024-06-27 23:49:01,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95287 conditions, 7914 events. 4755/7914 cut-off events. For 1616570/1616570 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 55397 event pairs, 1229 based on Foata normal form. 1/7902 useless extension candidates. Maximal degree in co-relation 95078. Up to 7143 conditions per place. [2024-06-27 23:49:01,081 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 706 selfloop transitions, 77 changer transitions 0/836 dead transitions. [2024-06-27 23:49:01,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 836 transitions, 16079 flow [2024-06-27 23:49:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:49:01,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:49:01,083 INFO L175 Difference]: Start difference. First operand has 458 places, 823 transitions, 14283 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:49:01,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 836 transitions, 16079 flow [2024-06-27 23:49:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 836 transitions, 15741 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:10,888 INFO L231 Difference]: Finished difference. Result has 460 places, 826 transitions, 14307 flow [2024-06-27 23:49:10,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13945, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14307, PETRI_PLACES=460, PETRI_TRANSITIONS=826} [2024-06-27 23:49:10,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-27 23:49:10,889 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 826 transitions, 14307 flow [2024-06-27 23:49:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:10,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:10,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:10,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:49:10,889 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)] === [2024-06-27 23:49:10,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1248961899, now seen corresponding path program 14 times [2024-06-27 23:49:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448929916] [2024-06-27 23:49:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:12,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:12,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448929916] [2024-06-27 23:49:12,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448929916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:12,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:12,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689399964] [2024-06-27 23:49:12,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:12,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:12,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 826 transitions, 14307 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:12,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:12,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:14,891 INFO L124 PetriNetUnfolderBase]: 4807/7985 cut-off events. [2024-06-27 23:49:14,892 INFO L125 PetriNetUnfolderBase]: For 1617206/1617215 co-relation queries the response was YES. [2024-06-27 23:49:14,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95338 conditions, 7985 events. 4807/7985 cut-off events. For 1617206/1617215 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 55996 event pairs, 1607 based on Foata normal form. 5/7975 useless extension candidates. Maximal degree in co-relation 95128. Up to 7129 conditions per place. [2024-06-27 23:49:15,038 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 623 selfloop transitions, 211 changer transitions 0/839 dead transitions. [2024-06-27 23:49:15,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 839 transitions, 16753 flow [2024-06-27 23:49:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:49:15,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:49:15,039 INFO L175 Difference]: Start difference. First operand has 460 places, 826 transitions, 14307 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:49:15,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 839 transitions, 16753 flow [2024-06-27 23:49:24,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 839 transitions, 16331 flow, removed 136 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:24,102 INFO L231 Difference]: Finished difference. Result has 462 places, 826 transitions, 14313 flow [2024-06-27 23:49:24,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13885, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14313, PETRI_PLACES=462, PETRI_TRANSITIONS=826} [2024-06-27 23:49:24,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-27 23:49:24,103 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 826 transitions, 14313 flow [2024-06-27 23:49:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:24,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:24,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:49:24,103 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)] === [2024-06-27 23:49:24,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 63926779, now seen corresponding path program 15 times [2024-06-27 23:49:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:24,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837214103] [2024-06-27 23:49:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837214103] [2024-06-27 23:49:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837214103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:25,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344848978] [2024-06-27 23:49:25,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:25,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:25,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 826 transitions, 14313 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:25,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:25,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:25,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:27,853 INFO L124 PetriNetUnfolderBase]: 4804/7976 cut-off events. [2024-06-27 23:49:27,853 INFO L125 PetriNetUnfolderBase]: For 1600992/1601001 co-relation queries the response was YES. [2024-06-27 23:49:27,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94173 conditions, 7976 events. 4804/7976 cut-off events. For 1600992/1601001 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 55832 event pairs, 1607 based on Foata normal form. 5/7966 useless extension candidates. Maximal degree in co-relation 93962. Up to 7126 conditions per place. [2024-06-27 23:49:27,999 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 624 selfloop transitions, 209 changer transitions 0/838 dead transitions. [2024-06-27 23:49:27,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 838 transitions, 16513 flow [2024-06-27 23:49:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:49:28,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:49:28,001 INFO L175 Difference]: Start difference. First operand has 462 places, 826 transitions, 14313 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:49:28,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 838 transitions, 16513 flow [2024-06-27 23:49:37,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 838 transitions, 15717 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-27 23:49:37,188 INFO L231 Difference]: Finished difference. Result has 461 places, 826 transitions, 13941 flow [2024-06-27 23:49:37,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13517, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13941, PETRI_PLACES=461, PETRI_TRANSITIONS=826} [2024-06-27 23:49:37,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 23:49:37,189 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 826 transitions, 13941 flow [2024-06-27 23:49:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:37,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:37,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 23:49:37,190 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)] === [2024-06-27 23:49:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1249199235, now seen corresponding path program 11 times [2024-06-27 23:49:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116630634] [2024-06-27 23:49:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:38,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:38,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116630634] [2024-06-27 23:49:38,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116630634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:38,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639440833] [2024-06-27 23:49:38,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:38,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:38,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 826 transitions, 13941 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:38,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:38,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:38,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:41,022 INFO L124 PetriNetUnfolderBase]: 4745/7914 cut-off events. [2024-06-27 23:49:41,022 INFO L125 PetriNetUnfolderBase]: For 1615164/1615173 co-relation queries the response was YES. [2024-06-27 23:49:41,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93390 conditions, 7914 events. 4745/7914 cut-off events. For 1615164/1615173 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 55778 event pairs, 1572 based on Foata normal form. 5/7904 useless extension candidates. Maximal degree in co-relation 93179. Up to 6980 conditions per place. [2024-06-27 23:49:41,168 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 620 selfloop transitions, 163 changer transitions 0/836 dead transitions. [2024-06-27 23:49:41,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 836 transitions, 15541 flow [2024-06-27 23:49:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 23:49:41,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 23:49:41,169 INFO L175 Difference]: Start difference. First operand has 461 places, 826 transitions, 13941 flow. Second operand 9 states and 161 transitions. [2024-06-27 23:49:41,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 836 transitions, 15541 flow [2024-06-27 23:49:52,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 836 transitions, 14967 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:52,990 INFO L231 Difference]: Finished difference. Result has 463 places, 826 transitions, 13699 flow [2024-06-27 23:49:52,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13367, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13699, PETRI_PLACES=463, PETRI_TRANSITIONS=826} [2024-06-27 23:49:52,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-27 23:49:52,991 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 826 transitions, 13699 flow [2024-06-27 23:49:52,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:52,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:52,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 23:49:52,992 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)] === [2024-06-27 23:49:52,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1249199421, now seen corresponding path program 20 times [2024-06-27 23:49:52,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:52,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404062085] [2024-06-27 23:49:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404062085] [2024-06-27 23:49:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404062085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:54,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492582797] [2024-06-27 23:49:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:54,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:54,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 826 transitions, 13699 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:54,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:54,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:54,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:56,806 INFO L124 PetriNetUnfolderBase]: 4743/7900 cut-off events. [2024-06-27 23:49:56,807 INFO L125 PetriNetUnfolderBase]: For 1628948/1628951 co-relation queries the response was YES. [2024-06-27 23:49:56,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93077 conditions, 7900 events. 4743/7900 cut-off events. For 1628948/1628951 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 55338 event pairs, 1242 based on Foata normal form. 1/7870 useless extension candidates. Maximal degree in co-relation 92865. Up to 6566 conditions per place. [2024-06-27 23:49:56,959 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 347 changer transitions 0/837 dead transitions. [2024-06-27 23:49:56,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 837 transitions, 15555 flow [2024-06-27 23:49:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:49:56,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:49:56,960 INFO L175 Difference]: Start difference. First operand has 463 places, 826 transitions, 13699 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:49:56,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 837 transitions, 15555 flow [2024-06-27 23:50:05,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 837 transitions, 14941 flow, removed 75 selfloop flow, removed 10 redundant places. [2024-06-27 23:50:05,976 INFO L231 Difference]: Finished difference. Result has 461 places, 826 transitions, 13785 flow [2024-06-27 23:50:05,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13085, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13785, PETRI_PLACES=461, PETRI_TRANSITIONS=826} [2024-06-27 23:50:05,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 23:50:05,977 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 826 transitions, 13785 flow [2024-06-27 23:50:05,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:05,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:05,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:05,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 23:50:05,978 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)] === [2024-06-27 23:50:05,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -835170861, now seen corresponding path program 2 times [2024-06-27 23:50:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:05,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623473609] [2024-06-27 23:50:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:05,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:07,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:07,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623473609] [2024-06-27 23:50:07,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623473609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:07,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:07,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:07,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696364690] [2024-06-27 23:50:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:07,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:07,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:07,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:07,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 826 transitions, 13785 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:07,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:07,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:07,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:10,356 INFO L124 PetriNetUnfolderBase]: 4616/7699 cut-off events. [2024-06-27 23:50:10,357 INFO L125 PetriNetUnfolderBase]: For 1658038/1658048 co-relation queries the response was YES. [2024-06-27 23:50:10,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91406 conditions, 7699 events. 4616/7699 cut-off events. For 1658038/1658048 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 54260 event pairs, 1921 based on Foata normal form. 6/7642 useless extension candidates. Maximal degree in co-relation 91194. Up to 6941 conditions per place. [2024-06-27 23:50:10,490 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 719 selfloop transitions, 22 changer transitions 0/840 dead transitions. [2024-06-27 23:50:10,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 840 transitions, 15417 flow [2024-06-27 23:50:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 23:50:10,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 23:50:10,491 INFO L175 Difference]: Start difference. First operand has 461 places, 826 transitions, 13785 flow. Second operand 9 states and 156 transitions. [2024-06-27 23:50:10,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 840 transitions, 15417 flow [2024-06-27 23:50:18,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 840 transitions, 14601 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:18,340 INFO L231 Difference]: Finished difference. Result has 463 places, 829 transitions, 13139 flow [2024-06-27 23:50:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12969, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13139, PETRI_PLACES=463, PETRI_TRANSITIONS=829} [2024-06-27 23:50:18,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-27 23:50:18,341 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 829 transitions, 13139 flow [2024-06-27 23:50:18,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:18,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 23:50:18,342 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)] === [2024-06-27 23:50:18,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1248952971, now seen corresponding path program 3 times [2024-06-27 23:50:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978893808] [2024-06-27 23:50:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:19,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978893808] [2024-06-27 23:50:19,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978893808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:19,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:19,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:19,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448001646] [2024-06-27 23:50:19,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:19,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:19,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:20,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:50:20,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 829 transitions, 13139 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:20,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:20,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:50:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:22,302 INFO L124 PetriNetUnfolderBase]: 4615/7706 cut-off events. [2024-06-27 23:50:22,303 INFO L125 PetriNetUnfolderBase]: For 1682003/1682006 co-relation queries the response was YES. [2024-06-27 23:50:22,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91162 conditions, 7706 events. 4615/7706 cut-off events. For 1682003/1682006 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 54291 event pairs, 1207 based on Foata normal form. 4/7643 useless extension candidates. Maximal degree in co-relation 90949. Up to 6784 conditions per place. [2024-06-27 23:50:22,459 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 643 selfloop transitions, 105 changer transitions 0/847 dead transitions. [2024-06-27 23:50:22,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 847 transitions, 15169 flow [2024-06-27 23:50:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:50:22,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 23:50:22,460 INFO L175 Difference]: Start difference. First operand has 463 places, 829 transitions, 13139 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:50:22,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 847 transitions, 15169 flow [2024-06-27 23:50:30,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 847 transitions, 15021 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:30,423 INFO L231 Difference]: Finished difference. Result has 464 places, 835 transitions, 13453 flow [2024-06-27 23:50:30,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12991, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13453, PETRI_PLACES=464, PETRI_TRANSITIONS=835} [2024-06-27 23:50:30,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 23:50:30,424 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 835 transitions, 13453 flow [2024-06-27 23:50:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:30,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:30,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:30,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 23:50:30,425 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)] === [2024-06-27 23:50:30,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -849455661, now seen corresponding path program 4 times [2024-06-27 23:50:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624799905] [2024-06-27 23:50:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624799905] [2024-06-27 23:50:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624799905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:32,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:32,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736411961] [2024-06-27 23:50:32,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:32,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:50:32,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 835 transitions, 13453 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:32,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:32,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:50:32,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:34,472 INFO L124 PetriNetUnfolderBase]: 4618/7712 cut-off events. [2024-06-27 23:50:34,472 INFO L125 PetriNetUnfolderBase]: For 1711595/1711626 co-relation queries the response was YES. [2024-06-27 23:50:34,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91937 conditions, 7712 events. 4618/7712 cut-off events. For 1711595/1711626 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 54348 event pairs, 1208 based on Foata normal form. 4/7648 useless extension candidates. Maximal degree in co-relation 91724. Up to 6788 conditions per place. [2024-06-27 23:50:34,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 631 selfloop transitions, 120 changer transitions 0/850 dead transitions. [2024-06-27 23:50:34,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 850 transitions, 15377 flow [2024-06-27 23:50:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:50:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:50:34,618 INFO L175 Difference]: Start difference. First operand has 464 places, 835 transitions, 13453 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:50:34,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 850 transitions, 15377 flow [2024-06-27 23:50:42,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 850 transitions, 15157 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:42,096 INFO L231 Difference]: Finished difference. Result has 468 places, 838 transitions, 13605 flow [2024-06-27 23:50:42,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13237, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13605, PETRI_PLACES=468, PETRI_TRANSITIONS=838} [2024-06-27 23:50:42,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-27 23:50:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 838 transitions, 13605 flow [2024-06-27 23:50:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:42,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:42,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 23:50:42,098 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)] === [2024-06-27 23:50:42,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash -835646091, now seen corresponding path program 5 times [2024-06-27 23:50:42,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:42,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478623174] [2024-06-27 23:50:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478623174] [2024-06-27 23:50:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478623174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:43,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:43,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:43,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002984796] [2024-06-27 23:50:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:43,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:43,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:50:43,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 838 transitions, 13605 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:43,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:43,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:50:43,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:46,046 INFO L124 PetriNetUnfolderBase]: 4613/7706 cut-off events. [2024-06-27 23:50:46,046 INFO L125 PetriNetUnfolderBase]: For 1712330/1712361 co-relation queries the response was YES. [2024-06-27 23:50:46,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91838 conditions, 7706 events. 4613/7706 cut-off events. For 1712330/1712361 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 54332 event pairs, 1207 based on Foata normal form. 7/7646 useless extension candidates. Maximal degree in co-relation 91623. Up to 6785 conditions per place. [2024-06-27 23:50:46,190 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 622 selfloop transitions, 128 changer transitions 0/849 dead transitions. [2024-06-27 23:50:46,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 849 transitions, 15141 flow [2024-06-27 23:50:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:50:46,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:50:46,192 INFO L175 Difference]: Start difference. First operand has 468 places, 838 transitions, 13605 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:50:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 849 transitions, 15141 flow [2024-06-27 23:50:54,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 849 transitions, 14690 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:54,626 INFO L231 Difference]: Finished difference. Result has 470 places, 838 transitions, 13416 flow [2024-06-27 23:50:54,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13154, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13416, PETRI_PLACES=470, PETRI_TRANSITIONS=838} [2024-06-27 23:50:54,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 23:50:54,632 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 838 transitions, 13416 flow [2024-06-27 23:50:54,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:54,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:54,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:54,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 23:50:54,633 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)] === [2024-06-27 23:50:54,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 385331353, now seen corresponding path program 1 times [2024-06-27 23:50:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:54,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350563539] [2024-06-27 23:50:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:54,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:55,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:55,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350563539] [2024-06-27 23:50:55,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350563539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:55,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:55,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485614831] [2024-06-27 23:50:55,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:55,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:55,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:56,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:50:56,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 838 transitions, 13416 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:56,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:56,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:50:56,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:58,533 INFO L124 PetriNetUnfolderBase]: 4700/7870 cut-off events. [2024-06-27 23:50:58,533 INFO L125 PetriNetUnfolderBase]: For 1750161/1750161 co-relation queries the response was YES. [2024-06-27 23:50:58,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93509 conditions, 7870 events. 4700/7870 cut-off events. For 1750161/1750161 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 55780 event pairs, 1859 based on Foata normal form. 2/7862 useless extension candidates. Maximal degree in co-relation 93293. Up to 7066 conditions per place. [2024-06-27 23:50:58,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 778 selfloop transitions, 17 changer transitions 0/861 dead transitions. [2024-06-27 23:50:58,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 861 transitions, 15220 flow [2024-06-27 23:50:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:50:58,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:50:58,679 INFO L175 Difference]: Start difference. First operand has 470 places, 838 transitions, 13416 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:50:58,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 861 transitions, 15220 flow [2024-06-27 23:51:07,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 861 transitions, 14938 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:07,192 INFO L231 Difference]: Finished difference. Result has 472 places, 840 transitions, 13299 flow [2024-06-27 23:51:07,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13134, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13299, PETRI_PLACES=472, PETRI_TRANSITIONS=840} [2024-06-27 23:51:07,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-27 23:51:07,193 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 840 transitions, 13299 flow [2024-06-27 23:51:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:07,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:07,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:07,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 23:51:07,194 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)] === [2024-06-27 23:51:07,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash 140667473, now seen corresponding path program 2 times [2024-06-27 23:51:07,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:07,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390008822] [2024-06-27 23:51:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390008822] [2024-06-27 23:51:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390008822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:08,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:08,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120507127] [2024-06-27 23:51:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:08,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:08,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:51:08,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 840 transitions, 13299 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:08,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:08,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:51:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:11,139 INFO L124 PetriNetUnfolderBase]: 4707/7881 cut-off events. [2024-06-27 23:51:11,139 INFO L125 PetriNetUnfolderBase]: For 1773905/1773905 co-relation queries the response was YES. [2024-06-27 23:51:11,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93777 conditions, 7881 events. 4707/7881 cut-off events. For 1773905/1773905 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 55826 event pairs, 1895 based on Foata normal form. 2/7877 useless extension candidates. Maximal degree in co-relation 93559. Up to 7094 conditions per place. [2024-06-27 23:51:11,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 775 selfloop transitions, 18 changer transitions 0/859 dead transitions. [2024-06-27 23:51:11,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 859 transitions, 15083 flow [2024-06-27 23:51:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 23:51:11,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 23:51:11,286 INFO L175 Difference]: Start difference. First operand has 472 places, 840 transitions, 13299 flow. Second operand 9 states and 166 transitions. [2024-06-27 23:51:11,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 859 transitions, 15083 flow [2024-06-27 23:51:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 859 transitions, 14942 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:21,882 INFO L231 Difference]: Finished difference. Result has 476 places, 842 transitions, 13329 flow [2024-06-27 23:51:21,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13158, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13329, PETRI_PLACES=476, PETRI_TRANSITIONS=842} [2024-06-27 23:51:21,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-27 23:51:21,883 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 842 transitions, 13329 flow [2024-06-27 23:51:21,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:21,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:21,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:21,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 23:51:21,883 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)] === [2024-06-27 23:51:21,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1212677113, now seen corresponding path program 1 times [2024-06-27 23:51:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:21,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809789402] [2024-06-27 23:51:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:23,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809789402] [2024-06-27 23:51:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809789402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:51:23,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133961408] [2024-06-27 23:51:23,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:51:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:51:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:51:23,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:23,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 842 transitions, 13329 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:23,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:23,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:23,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:26,186 INFO L124 PetriNetUnfolderBase]: 4764/7941 cut-off events. [2024-06-27 23:51:26,186 INFO L125 PetriNetUnfolderBase]: For 1785673/1785673 co-relation queries the response was YES. [2024-06-27 23:51:26,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94042 conditions, 7941 events. 4764/7941 cut-off events. For 1785673/1785673 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 55971 event pairs, 1936 based on Foata normal form. 2/7937 useless extension candidates. Maximal degree in co-relation 93823. Up to 7306 conditions per place. [2024-06-27 23:51:26,333 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 820 selfloop transitions, 24 changer transitions 0/862 dead transitions. [2024-06-27 23:51:26,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 862 transitions, 15207 flow [2024-06-27 23:51:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:51:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:51:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 23:51:26,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-27 23:51:26,334 INFO L175 Difference]: Start difference. First operand has 476 places, 842 transitions, 13329 flow. Second operand 10 states and 173 transitions. [2024-06-27 23:51:26,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 862 transitions, 15207 flow [2024-06-27 23:51:34,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 862 transitions, 14950 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-27 23:51:35,007 INFO L231 Difference]: Finished difference. Result has 478 places, 845 transitions, 13252 flow [2024-06-27 23:51:35,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13072, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13252, PETRI_PLACES=478, PETRI_TRANSITIONS=845} [2024-06-27 23:51:35,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 23:51:35,008 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 845 transitions, 13252 flow [2024-06-27 23:51:35,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:35,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:35,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 23:51:35,009 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)] === [2024-06-27 23:51:35,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:35,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1097390903, now seen corresponding path program 3 times [2024-06-27 23:51:35,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820833019] [2024-06-27 23:51:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:36,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820833019] [2024-06-27 23:51:36,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820833019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:36,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:36,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124462516] [2024-06-27 23:51:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:36,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:51:36,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 845 transitions, 13252 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:36,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:36,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:51:36,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:40,029 INFO L124 PetriNetUnfolderBase]: 4717/7898 cut-off events. [2024-06-27 23:51:40,029 INFO L125 PetriNetUnfolderBase]: For 1819537/1819537 co-relation queries the response was YES. [2024-06-27 23:51:40,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94391 conditions, 7898 events. 4717/7898 cut-off events. For 1819537/1819537 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 55976 event pairs, 1894 based on Foata normal form. 2/7894 useless extension candidates. Maximal degree in co-relation 94172. Up to 7104 conditions per place. [2024-06-27 23:51:40,190 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 772 selfloop transitions, 23 changer transitions 0/861 dead transitions. [2024-06-27 23:51:40,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 861 transitions, 15028 flow [2024-06-27 23:51:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:51:40,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:51:40,191 INFO L175 Difference]: Start difference. First operand has 478 places, 845 transitions, 13252 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:51:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 861 transitions, 15028 flow [2024-06-27 23:51:49,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 861 transitions, 14868 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:49,589 INFO L231 Difference]: Finished difference. Result has 478 places, 847 transitions, 13279 flow [2024-06-27 23:51:49,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13092, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13279, PETRI_PLACES=478, PETRI_TRANSITIONS=847} [2024-06-27 23:51:49,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 23:51:49,590 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 847 transitions, 13279 flow [2024-06-27 23:51:49,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:49,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:49,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:49,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 23:51:49,591 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)] === [2024-06-27 23:51:49,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:49,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1097206205, now seen corresponding path program 1 times [2024-06-27 23:51:49,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:49,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749304971] [2024-06-27 23:51:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:49,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:51,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:51,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749304971] [2024-06-27 23:51:51,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749304971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:51,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:51,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:51:51,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357969514] [2024-06-27 23:51:51,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:51,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:51:51,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:51:51,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:51:51,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:51,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 847 transitions, 13279 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:51,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:51,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:51,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:54,349 INFO L124 PetriNetUnfolderBase]: 4853/8038 cut-off events. [2024-06-27 23:51:54,350 INFO L125 PetriNetUnfolderBase]: For 1832034/1832034 co-relation queries the response was YES. [2024-06-27 23:51:54,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95748 conditions, 8038 events. 4853/8038 cut-off events. For 1832034/1832034 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 56278 event pairs, 1980 based on Foata normal form. 1/8037 useless extension candidates. Maximal degree in co-relation 95529. Up to 7485 conditions per place. [2024-06-27 23:51:54,620 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 823 selfloop transitions, 36 changer transitions 0/864 dead transitions. [2024-06-27 23:51:54,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 864 transitions, 15115 flow [2024-06-27 23:51:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 23:51:54,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 23:51:54,621 INFO L175 Difference]: Start difference. First operand has 478 places, 847 transitions, 13279 flow. Second operand 9 states and 156 transitions. [2024-06-27 23:51:54,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 864 transitions, 15115 flow [2024-06-27 23:52:02,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 864 transitions, 14944 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 23:52:02,447 INFO L231 Difference]: Finished difference. Result has 480 places, 850 transitions, 13260 flow [2024-06-27 23:52:02,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13108, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13260, PETRI_PLACES=480, PETRI_TRANSITIONS=850} [2024-06-27 23:52:02,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-27 23:52:02,448 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 850 transitions, 13260 flow [2024-06-27 23:52:02,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:02,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:02,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:02,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 23:52:02,449 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)] === [2024-06-27 23:52:02,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1097206453, now seen corresponding path program 2 times [2024-06-27 23:52:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091879442] [2024-06-27 23:52:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:03,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:03,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091879442] [2024-06-27 23:52:03,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091879442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:03,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:03,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:52:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764600312] [2024-06-27 23:52:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:03,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:52:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:52:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:52:04,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:04,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 850 transitions, 13260 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:04,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:04,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:04,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:07,217 INFO L124 PetriNetUnfolderBase]: 4796/7991 cut-off events. [2024-06-27 23:52:07,217 INFO L125 PetriNetUnfolderBase]: For 1874578/1874578 co-relation queries the response was YES. [2024-06-27 23:52:07,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95637 conditions, 7991 events. 4796/7991 cut-off events. For 1874578/1874578 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 56373 event pairs, 1936 based on Foata normal form. 2/7987 useless extension candidates. Maximal degree in co-relation 95417. Up to 7319 conditions per place. [2024-06-27 23:52:07,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 806 selfloop transitions, 47 changer transitions 0/871 dead transitions. [2024-06-27 23:52:07,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 871 transitions, 15546 flow [2024-06-27 23:52:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 23:52:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 23:52:07,399 INFO L175 Difference]: Start difference. First operand has 480 places, 850 transitions, 13260 flow. Second operand 10 states and 175 transitions. [2024-06-27 23:52:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 871 transitions, 15546 flow [2024-06-27 23:52:15,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 871 transitions, 15424 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:15,088 INFO L231 Difference]: Finished difference. Result has 484 places, 856 transitions, 13497 flow [2024-06-27 23:52:15,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13138, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13497, PETRI_PLACES=484, PETRI_TRANSITIONS=856} [2024-06-27 23:52:15,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-27 23:52:15,088 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 856 transitions, 13497 flow [2024-06-27 23:52:15,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:15,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:15,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:15,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 23:52:15,089 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)] === [2024-06-27 23:52:15,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1097385943, now seen corresponding path program 3 times [2024-06-27 23:52:15,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922542713] [2024-06-27 23:52:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:16,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:16,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922542713] [2024-06-27 23:52:16,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922542713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:16,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:16,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:16,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358760749] [2024-06-27 23:52:16,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:16,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:16,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:16,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 856 transitions, 13497 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:16,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:19,811 INFO L124 PetriNetUnfolderBase]: 4803/8002 cut-off events. [2024-06-27 23:52:19,811 INFO L125 PetriNetUnfolderBase]: For 1910672/1910672 co-relation queries the response was YES. [2024-06-27 23:52:19,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96513 conditions, 8002 events. 4803/8002 cut-off events. For 1910672/1910672 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 56503 event pairs, 1936 based on Foata normal form. 2/7998 useless extension candidates. Maximal degree in co-relation 96292. Up to 7327 conditions per place. [2024-06-27 23:52:19,977 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 809 selfloop transitions, 47 changer transitions 0/874 dead transitions. [2024-06-27 23:52:19,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 874 transitions, 15671 flow [2024-06-27 23:52:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 23:52:19,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 23:52:19,979 INFO L175 Difference]: Start difference. First operand has 484 places, 856 transitions, 13497 flow. Second operand 10 states and 177 transitions. [2024-06-27 23:52:19,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 874 transitions, 15671 flow [2024-06-27 23:52:28,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 874 transitions, 15458 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:28,320 INFO L231 Difference]: Finished difference. Result has 488 places, 859 transitions, 13516 flow [2024-06-27 23:52:28,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13314, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13516, PETRI_PLACES=488, PETRI_TRANSITIONS=859} [2024-06-27 23:52:28,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-27 23:52:28,321 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 859 transitions, 13516 flow [2024-06-27 23:52:28,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:28,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:28,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:28,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 23:52:28,322 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)] === [2024-06-27 23:52:28,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1097212963, now seen corresponding path program 4 times [2024-06-27 23:52:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069347437] [2024-06-27 23:52:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:28,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:30,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:30,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069347437] [2024-06-27 23:52:30,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069347437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:30,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:30,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551267770] [2024-06-27 23:52:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:30,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:30,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:30,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:30,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:30,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 859 transitions, 13516 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:30,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:30,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:30,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:33,322 INFO L124 PetriNetUnfolderBase]: 4797/7994 cut-off events. [2024-06-27 23:52:33,322 INFO L125 PetriNetUnfolderBase]: For 1909923/1909923 co-relation queries the response was YES. [2024-06-27 23:52:33,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96133 conditions, 7994 events. 4797/7994 cut-off events. For 1909923/1909923 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 56416 event pairs, 1935 based on Foata normal form. 2/7990 useless extension candidates. Maximal degree in co-relation 95910. Up to 7322 conditions per place. [2024-06-27 23:52:33,618 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 807 selfloop transitions, 48 changer transitions 0/873 dead transitions. [2024-06-27 23:52:33,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 873 transitions, 15280 flow [2024-06-27 23:52:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:52:33,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:52:33,620 INFO L175 Difference]: Start difference. First operand has 488 places, 859 transitions, 13516 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:52:33,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 873 transitions, 15280 flow [2024-06-27 23:52:41,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 873 transitions, 15037 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-27 23:52:41,953 INFO L231 Difference]: Finished difference. Result has 490 places, 859 transitions, 13375 flow [2024-06-27 23:52:41,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13273, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13375, PETRI_PLACES=490, PETRI_TRANSITIONS=859} [2024-06-27 23:52:41,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-27 23:52:41,954 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 859 transitions, 13375 flow [2024-06-27 23:52:41,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:41,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:41,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:41,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 23:52:41,954 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)] === [2024-06-27 23:52:41,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:41,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1071821637, now seen corresponding path program 4 times [2024-06-27 23:52:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:41,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229033958] [2024-06-27 23:52:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:41,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:43,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:43,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229033958] [2024-06-27 23:52:43,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229033958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:43,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:43,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248988656] [2024-06-27 23:52:43,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:43,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:43,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:43,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:43,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:52:43,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 859 transitions, 13375 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:43,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:43,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:52:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:46,661 INFO L124 PetriNetUnfolderBase]: 4738/7935 cut-off events. [2024-06-27 23:52:46,661 INFO L125 PetriNetUnfolderBase]: For 1913665/1913668 co-relation queries the response was YES. [2024-06-27 23:52:46,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95394 conditions, 7935 events. 4738/7935 cut-off events. For 1913665/1913668 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 56316 event pairs, 1900 based on Foata normal form. 2/7929 useless extension candidates. Maximal degree in co-relation 95170. Up to 7122 conditions per place. [2024-06-27 23:52:46,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 776 selfloop transitions, 30 changer transitions 0/872 dead transitions. [2024-06-27 23:52:46,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 872 transitions, 15161 flow [2024-06-27 23:52:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:52:46,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:52:46,838 INFO L175 Difference]: Start difference. First operand has 490 places, 859 transitions, 13375 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:52:46,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 872 transitions, 15161 flow Killed by 15