./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe012_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe012_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:05:09,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:05:09,825 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:05:09,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:05:09,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:05:09,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:05:09,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:05:09,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:05:09,872 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:05:09,875 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:05:09,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:05:09,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:05:09,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:05:09,877 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:05:09,878 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:05:09,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:05:09,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:05:09,879 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:05:09,879 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:05:09,879 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:05:09,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:05:09,880 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:05:09,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:05:09,881 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:05:09,881 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:05:09,881 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:05:09,881 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:05:09,882 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:05:09,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:05:09,882 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:05:09,883 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:05:09,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:05:09,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:05:09,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:05:09,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:05:09,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:05:09,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:05:09,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:05:09,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:05:09,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:05:09,885 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:05:09,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:05:09,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:05:09,886 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:05:10,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:05:10,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:05:10,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:05:10,144 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:05:10,144 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:05:10,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-27 21:05:11,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:05:11,627 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:05:11,628 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-27 21:05:11,642 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07b613bd7/43d467fb6f504adeabf71dd3f4ce6f5b/FLAGe55d5ed60 [2024-06-27 21:05:11,657 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07b613bd7/43d467fb6f504adeabf71dd3f4ce6f5b [2024-06-27 21:05:11,659 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:05:11,659 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:05:11,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe012_power.oepc.yml/witness.yml [2024-06-27 21:05:11,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:05:11,872 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:05:11,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:05:11,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:05:11,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:05:11,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:05:11" (1/2) ... [2024-06-27 21:05:11,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1015d8cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:11, skipping insertion in model container [2024-06-27 21:05:11,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:05:11" (1/2) ... [2024-06-27 21:05:11,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@406609f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:11, skipping insertion in model container [2024-06-27 21:05:11,884 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:05:11" (2/2) ... [2024-06-27 21:05:11,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1015d8cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:05:11, skipping insertion in model container [2024-06-27 21:05:11,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:05:11" (2/2) ... [2024-06-27 21:05:11,885 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:05:12,029 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:05:12,030 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:05:12,030 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:05:12,031 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:05:12,031 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:05:12,031 INFO L106 edCorrectnessWitness]: ghost_update [L838-L838] multithreaded = 1; [2024-06-27 21:05:12,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:05:12,416 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:05:12,427 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:05:12,588 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:05:12,648 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:05:12,649 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:05:12 WrapperNode [2024-06-27 21:05:12,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:05:12,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:05:12,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:05:12,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:05:12,657 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,693 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,734 INFO L138 Inliner]: procedures = 175, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 173 [2024-06-27 21:05:12,742 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:05:12,743 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:05:12,743 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:05:12,743 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:05:12,753 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,754 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,769 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,820 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 21:05:12,820 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,820 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,863 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,876 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,878 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,887 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:05:12,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:05:12,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:05:12,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:05:12,897 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 09:05:12" (1/1) ... [2024-06-27 21:05:12,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:05:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:05:12,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:05:12,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:05:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:05:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:05:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:05:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:05:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:05:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:05:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:05:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:05:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:05:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:05:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:05:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:05:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:05:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:05:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:05:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:05:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:05:12,979 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:05:13,160 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:05:13,163 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:05:13,697 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:05:13,697 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:05:14,074 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:05:14,074 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:05:14,075 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:05:14 BoogieIcfgContainer [2024-06-27 21:05:14,075 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:05:14,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:05:14,078 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:05:14,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:05:14,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:05:11" (1/4) ... [2024-06-27 21:05:14,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a14ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:05:14, skipping insertion in model container [2024-06-27 21:05:14,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:05:11" (2/4) ... [2024-06-27 21:05:14,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a14ebc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:05:14, skipping insertion in model container [2024-06-27 21:05:14,083 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 09:05:12" (3/4) ... [2024-06-27 21:05:14,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a14ebc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:05:14, skipping insertion in model container [2024-06-27 21:05:14,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:05:14" (4/4) ... [2024-06-27 21:05:14,085 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.oepc.i [2024-06-27 21:05:14,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:05:14,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:05:14,102 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:05:14,167 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:05:14,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:05:14,243 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:05:14,243 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:05:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:05:14,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:05:14,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:05:14,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:05:14,270 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;@58c30f1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:05:14,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:05:14,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:05:14,280 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:05:14,280 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:05:14,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:14,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:05:14,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:14,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash 656494942, now seen corresponding path program 1 times [2024-06-27 21:05:14,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:14,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924322587] [2024-06-27 21:05:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924322587] [2024-06-27 21:05:16,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924322587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:16,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:16,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:05:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758488889] [2024-06-27 21:05:16,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:16,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:05:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:05:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:05:16,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:05:16,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:16,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:16,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:05:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:17,146 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-27 21:05:17,147 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 21:05:17,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5930 event pairs, 479 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-27 21:05:17,158 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:05:17,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-27 21:05:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:05:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:05:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-27 21:05:17,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-27 21:05:17,172 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-27 21:05:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-27 21:05:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:17,178 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:05:17,180 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 21:05:17,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:05:17,187 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:05:17,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:17,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:17,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:17,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:05:17,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:17,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash -468496483, now seen corresponding path program 1 times [2024-06-27 21:05:17,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:17,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330989959] [2024-06-27 21:05:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:17,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330989959] [2024-06-27 21:05:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330989959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:20,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:05:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844080360] [2024-06-27 21:05:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:05:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:05:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:05:20,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:05:20,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:20,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:20,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:05:20,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:21,011 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-27 21:05:21,011 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-27 21:05:21,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5881 event pairs, 369 based on Foata normal form. 6/1232 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-27 21:05:21,021 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 21:05:21,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-27 21:05:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:05:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:05:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-27 21:05:21,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 21:05:21,024 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-27 21:05:21,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-27 21:05:21,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:05:21,026 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 21:05:21,026 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 21:05:21,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 21:05:21,027 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 21:05:21,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:21,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:21,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:21,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:05:21,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:21,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1666810125, now seen corresponding path program 1 times [2024-06-27 21:05:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:21,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797773793] [2024-06-27 21:05:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:24,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:24,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797773793] [2024-06-27 21:05:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797773793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:24,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:24,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:05:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938384189] [2024-06-27 21:05:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:24,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:05:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:05:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:05:24,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 21:05:24,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:24,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:24,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 21:05:24,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:25,566 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-27 21:05:25,566 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-27 21:05:25,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7140 event pairs, 305 based on Foata normal form. 12/1530 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-27 21:05:25,579 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 21:05:25,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-27 21:05:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 21:05:25,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 21:05:25,586 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-27 21:05:25,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-27 21:05:25,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:25,590 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 21:05:25,590 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 21:05:25,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 21:05:25,592 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 21:05:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:25,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:05:25,593 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 21:05:25,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1899358389, now seen corresponding path program 1 times [2024-06-27 21:05:25,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:25,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809949453] [2024-06-27 21:05:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809949453] [2024-06-27 21:05:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809949453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:27,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:05:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957812876] [2024-06-27 21:05:27,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:27,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:05:27,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:27,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:05:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:05:27,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:05:27,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:27,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:27,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:05:27,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:28,521 INFO L124 PetriNetUnfolderBase]: 964/1518 cut-off events. [2024-06-27 21:05:28,521 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-27 21:05:28,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 1518 events. 964/1518 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7112 event pairs, 382 based on Foata normal form. 8/1523 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-27 21:05:28,532 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 21:05:28,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-27 21:05:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:05:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:05:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 21:05:28,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:05:28,535 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-27 21:05:28,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-27 21:05:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:28,542 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 21:05:28,542 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=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:05:28,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-27 21:05:28,544 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 21:05:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:28,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:28,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:28,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:05:28,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:28,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1249430784, now seen corresponding path program 1 times [2024-06-27 21:05:28,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243988730] [2024-06-27 21:05:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:28,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243988730] [2024-06-27 21:05:30,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243988730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:30,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993240678] [2024-06-27 21:05:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:30,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:05:30,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:30,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:30,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:05:30,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:31,816 INFO L124 PetriNetUnfolderBase]: 1112/1732 cut-off events. [2024-06-27 21:05:31,816 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-27 21:05:31,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 1732 events. 1112/1732 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8125 event pairs, 451 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-27 21:05:31,832 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 21:05:31,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 424 flow [2024-06-27 21:05:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:05:31,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:05:31,837 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:05:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 424 flow [2024-06-27 21:05:31,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 397 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:31,848 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-27 21:05:31,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-27 21:05:31,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 21:05:31,851 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-27 21:05:31,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:31,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:31,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:31,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:05:31,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:31,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 781011896, now seen corresponding path program 1 times [2024-06-27 21:05:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694216604] [2024-06-27 21:05:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:34,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694216604] [2024-06-27 21:05:34,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694216604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:34,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:34,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:34,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729626208] [2024-06-27 21:05:34,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:34,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:34,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:34,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:34,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:05:34,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:34,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:34,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:05:34,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:35,915 INFO L124 PetriNetUnfolderBase]: 1067/1677 cut-off events. [2024-06-27 21:05:35,916 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-27 21:05:35,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1677 events. 1067/1677 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7955 event pairs, 390 based on Foata normal form. 14/1679 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-27 21:05:35,930 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-27 21:05:35,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 535 flow [2024-06-27 21:05:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 21:05:35,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 21:05:35,931 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 118 transitions. [2024-06-27 21:05:35,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 535 flow [2024-06-27 21:05:35,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 529 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:05:35,937 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-27 21:05:35,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 21:05:35,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 21:05:35,941 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-27 21:05:35,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:35,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:35,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:05:35,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:35,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash 809818646, now seen corresponding path program 2 times [2024-06-27 21:05:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:35,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5620237] [2024-06-27 21:05:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:35,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:38,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:38,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5620237] [2024-06-27 21:05:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5620237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:38,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:38,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339340290] [2024-06-27 21:05:38,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:38,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:38,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:38,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:05:38,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:38,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:38,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:05:38,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:40,071 INFO L124 PetriNetUnfolderBase]: 1122/1759 cut-off events. [2024-06-27 21:05:40,071 INFO L125 PetriNetUnfolderBase]: For 4769/4772 co-relation queries the response was YES. [2024-06-27 21:05:40,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6221 conditions, 1759 events. 1122/1759 cut-off events. For 4769/4772 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8478 event pairs, 392 based on Foata normal form. 5/1761 useless extension candidates. Maximal degree in co-relation 6196. Up to 1618 conditions per place. [2024-06-27 21:05:40,086 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 21:05:40,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 561 flow [2024-06-27 21:05:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:05:40,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:05:40,088 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:05:40,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 561 flow [2024-06-27 21:05:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 528 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:40,097 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-27 21:05:40,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-27 21:05:40,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 21:05:40,098 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-27 21:05:40,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:05:40,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:40,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash 550421219, now seen corresponding path program 1 times [2024-06-27 21:05:40,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699617877] [2024-06-27 21:05:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:40,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:42,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:42,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699617877] [2024-06-27 21:05:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699617877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:42,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:42,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427781474] [2024-06-27 21:05:42,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:42,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:05:42,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:42,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:42,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:05:42,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:44,296 INFO L124 PetriNetUnfolderBase]: 1210/1901 cut-off events. [2024-06-27 21:05:44,296 INFO L125 PetriNetUnfolderBase]: For 6368/6408 co-relation queries the response was YES. [2024-06-27 21:05:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6974 conditions, 1901 events. 1210/1901 cut-off events. For 6368/6408 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9109 event pairs, 395 based on Foata normal form. 20/1910 useless extension candidates. Maximal degree in co-relation 6947. Up to 1668 conditions per place. [2024-06-27 21:05:44,318 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 86 selfloop transitions, 36 changer transitions 0/131 dead transitions. [2024-06-27 21:05:44,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 131 transitions, 873 flow [2024-06-27 21:05:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:05:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:05:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 21:05:44,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 21:05:44,322 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 11 states and 203 transitions. [2024-06-27 21:05:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 131 transitions, 873 flow [2024-06-27 21:05:44,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 131 transitions, 809 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:44,332 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 542 flow [2024-06-27 21:05:44,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=542, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-27 21:05:44,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 21:05:44,335 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 542 flow [2024-06-27 21:05:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:44,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:44,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:44,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:05:44,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:44,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1710519677, now seen corresponding path program 2 times [2024-06-27 21:05:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128173282] [2024-06-27 21:05:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:44,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:47,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:47,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128173282] [2024-06-27 21:05:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128173282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:47,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:47,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423069504] [2024-06-27 21:05:47,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:47,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:47,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:47,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:05:47,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:47,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:47,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:05:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:48,739 INFO L124 PetriNetUnfolderBase]: 1223/1926 cut-off events. [2024-06-27 21:05:48,739 INFO L125 PetriNetUnfolderBase]: For 9475/9525 co-relation queries the response was YES. [2024-06-27 21:05:48,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 1926 events. 1223/1926 cut-off events. For 9475/9525 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9266 event pairs, 385 based on Foata normal form. 28/1943 useless extension candidates. Maximal degree in co-relation 7973. Up to 1738 conditions per place. [2024-06-27 21:05:48,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-27 21:05:48,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 906 flow [2024-06-27 21:05:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:05:48,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 21:05:48,757 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 542 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:05:48,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 906 flow [2024-06-27 21:05:48,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 888 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:48,776 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 642 flow [2024-06-27 21:05:48,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=642, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-27 21:05:48,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 21:05:48,778 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 642 flow [2024-06-27 21:05:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:48,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:48,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:05:48,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:48,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash -865793135, now seen corresponding path program 3 times [2024-06-27 21:05:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:48,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835369559] [2024-06-27 21:05:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835369559] [2024-06-27 21:05:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835369559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:51,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:51,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:51,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380252087] [2024-06-27 21:05:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:51,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:51,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:51,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:05:51,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 642 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:51,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:05:51,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:53,110 INFO L124 PetriNetUnfolderBase]: 1238/1954 cut-off events. [2024-06-27 21:05:53,111 INFO L125 PetriNetUnfolderBase]: For 11981/12038 co-relation queries the response was YES. [2024-06-27 21:05:53,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8696 conditions, 1954 events. 1238/1954 cut-off events. For 11981/12038 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9436 event pairs, 395 based on Foata normal form. 16/1955 useless extension candidates. Maximal degree in co-relation 8663. Up to 1692 conditions per place. [2024-06-27 21:05:53,126 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 39 changer transitions 0/125 dead transitions. [2024-06-27 21:05:53,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 1056 flow [2024-06-27 21:05:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 21:05:53,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 21:05:53,128 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 642 flow. Second operand 7 states and 137 transitions. [2024-06-27 21:05:53,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 1056 flow [2024-06-27 21:05:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 988 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:53,143 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 730 flow [2024-06-27 21:05:53,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=730, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-27 21:05:53,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 21:05:53,144 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 730 flow [2024-06-27 21:05:53,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:53,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:53,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:53,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:05:53,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:53,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1881226943, now seen corresponding path program 1 times [2024-06-27 21:05:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:53,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649411095] [2024-06-27 21:05:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:53,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:56,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649411095] [2024-06-27 21:05:56,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649411095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:56,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:56,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:56,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730123943] [2024-06-27 21:05:56,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:56,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:56,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:05:56,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 730 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:56,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:56,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:05:56,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:57,315 INFO L124 PetriNetUnfolderBase]: 1341/2092 cut-off events. [2024-06-27 21:05:57,315 INFO L125 PetriNetUnfolderBase]: For 14551/14555 co-relation queries the response was YES. [2024-06-27 21:05:57,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 2092 events. 1341/2092 cut-off events. For 14551/14555 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10059 event pairs, 423 based on Foata normal form. 6/2095 useless extension candidates. Maximal degree in co-relation 9497. Up to 1902 conditions per place. [2024-06-27 21:05:57,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-27 21:05:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 142 transitions, 1234 flow [2024-06-27 21:05:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:05:57,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 21:05:57,333 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 730 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:05:57,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 142 transitions, 1234 flow [2024-06-27 21:05:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1174 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:57,354 INFO L231 Difference]: Finished difference. Result has 88 places, 110 transitions, 849 flow [2024-06-27 21:05:57,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=849, PETRI_PLACES=88, PETRI_TRANSITIONS=110} [2024-06-27 21:05:57,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 21:05:57,355 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 110 transitions, 849 flow [2024-06-27 21:05:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:57,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:57,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:57,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:05:57,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:57,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:57,357 INFO L85 PathProgramCache]: Analyzing trace with hash -665187299, now seen corresponding path program 2 times [2024-06-27 21:05:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:57,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643035536] [2024-06-27 21:05:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643035536] [2024-06-27 21:05:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643035536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:59,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:59,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109550930] [2024-06-27 21:05:59,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:59,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:59,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:05:59,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 849 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:59,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:59,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:05:59,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:01,169 INFO L124 PetriNetUnfolderBase]: 1354/2119 cut-off events. [2024-06-27 21:06:01,169 INFO L125 PetriNetUnfolderBase]: For 16868/16887 co-relation queries the response was YES. [2024-06-27 21:06:01,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10146 conditions, 2119 events. 1354/2119 cut-off events. For 16868/16887 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10231 event pairs, 420 based on Foata normal form. 16/2131 useless extension candidates. Maximal degree in co-relation 10108. Up to 1916 conditions per place. [2024-06-27 21:06:01,183 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2024-06-27 21:06:01,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 144 transitions, 1301 flow [2024-06-27 21:06:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:06:01,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:06:01,186 INFO L175 Difference]: Start difference. First operand has 88 places, 110 transitions, 849 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:06:01,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 144 transitions, 1301 flow [2024-06-27 21:06:01,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 144 transitions, 1259 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:01,209 INFO L231 Difference]: Finished difference. Result has 93 places, 116 transitions, 930 flow [2024-06-27 21:06:01,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=93, PETRI_TRANSITIONS=116} [2024-06-27 21:06:01,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-27 21:06:01,210 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 116 transitions, 930 flow [2024-06-27 21:06:01,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:01,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:01,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:01,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:06:01,211 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:01,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1887656033, now seen corresponding path program 3 times [2024-06-27 21:06:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:01,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517189143] [2024-06-27 21:06:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:01,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:03,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517189143] [2024-06-27 21:06:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517189143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:03,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:03,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109924821] [2024-06-27 21:06:03,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:03,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:03,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 116 transitions, 930 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:03,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:03,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:03,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:04,975 INFO L124 PetriNetUnfolderBase]: 1349/2112 cut-off events. [2024-06-27 21:06:04,975 INFO L125 PetriNetUnfolderBase]: For 18780/18799 co-relation queries the response was YES. [2024-06-27 21:06:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10296 conditions, 2112 events. 1349/2112 cut-off events. For 18780/18799 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10181 event pairs, 420 based on Foata normal form. 16/2124 useless extension candidates. Maximal degree in co-relation 10256. Up to 1911 conditions per place. [2024-06-27 21:06:05,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 109 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-06-27 21:06:05,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1284 flow [2024-06-27 21:06:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:06:05,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:06:05,022 INFO L175 Difference]: Start difference. First operand has 93 places, 116 transitions, 930 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:06:05,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1284 flow [2024-06-27 21:06:05,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1253 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:06:05,047 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 963 flow [2024-06-27 21:06:05,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=963, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-27 21:06:05,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 21:06:05,048 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 963 flow [2024-06-27 21:06:05,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:05,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:05,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:06:05,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:05,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1887655847, now seen corresponding path program 4 times [2024-06-27 21:06:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:05,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934707300] [2024-06-27 21:06:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:07,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:07,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934707300] [2024-06-27 21:06:07,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934707300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:07,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:07,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:07,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571601851] [2024-06-27 21:06:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:07,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:07,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:07,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:06:07,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 963 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:07,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:07,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:06:07,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:09,051 INFO L124 PetriNetUnfolderBase]: 1277/2026 cut-off events. [2024-06-27 21:06:09,051 INFO L125 PetriNetUnfolderBase]: For 21192/21304 co-relation queries the response was YES. [2024-06-27 21:06:09,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 2026 events. 1277/2026 cut-off events. For 21192/21304 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9924 event pairs, 379 based on Foata normal form. 20/1999 useless extension candidates. Maximal degree in co-relation 10151. Up to 1720 conditions per place. [2024-06-27 21:06:09,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-06-27 21:06:09,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 140 transitions, 1281 flow [2024-06-27 21:06:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:06:09,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 21:06:09,065 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 963 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:06:09,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 140 transitions, 1281 flow [2024-06-27 21:06:09,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 1209 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:09,087 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 988 flow [2024-06-27 21:06:09,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=988, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-27 21:06:09,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 21:06:09,089 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 988 flow [2024-06-27 21:06:09,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:09,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:09,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:06:09,090 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:09,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1887902111, now seen corresponding path program 1 times [2024-06-27 21:06:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:09,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056410607] [2024-06-27 21:06:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:11,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:11,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056410607] [2024-06-27 21:06:11,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056410607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:11,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:11,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:11,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105922728] [2024-06-27 21:06:11,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:11,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:11,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:11,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:11,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:11,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 988 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:11,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:11,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:11,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:12,579 INFO L124 PetriNetUnfolderBase]: 1333/2085 cut-off events. [2024-06-27 21:06:12,579 INFO L125 PetriNetUnfolderBase]: For 22899/22901 co-relation queries the response was YES. [2024-06-27 21:06:12,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10500 conditions, 2085 events. 1333/2085 cut-off events. For 22899/22901 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10017 event pairs, 412 based on Foata normal form. 4/2087 useless extension candidates. Maximal degree in co-relation 10457. Up to 1953 conditions per place. [2024-06-27 21:06:12,592 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-06-27 21:06:12,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1346 flow [2024-06-27 21:06:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:06:12,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:06:12,600 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 988 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:06:12,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1346 flow [2024-06-27 21:06:12,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 143 transitions, 1228 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:12,625 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 919 flow [2024-06-27 21:06:12,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-27 21:06:12,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 21:06:12,627 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 919 flow [2024-06-27 21:06:12,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:12,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:12,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:12,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:06:12,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:12,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -714206238, now seen corresponding path program 1 times [2024-06-27 21:06:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879212073] [2024-06-27 21:06:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:15,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:15,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879212073] [2024-06-27 21:06:15,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879212073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:15,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:15,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:15,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256333111] [2024-06-27 21:06:15,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:15,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:15,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:15,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:15,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 919 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:15,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:15,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:15,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:16,881 INFO L124 PetriNetUnfolderBase]: 1346/2112 cut-off events. [2024-06-27 21:06:16,882 INFO L125 PetriNetUnfolderBase]: For 24338/24346 co-relation queries the response was YES. [2024-06-27 21:06:16,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10695 conditions, 2112 events. 1346/2112 cut-off events. For 24338/24346 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10180 event pairs, 390 based on Foata normal form. 10/2120 useless extension candidates. Maximal degree in co-relation 10651. Up to 1904 conditions per place. [2024-06-27 21:06:16,898 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-27 21:06:16,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1479 flow [2024-06-27 21:06:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:06:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:06:16,900 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 919 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:06:16,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1479 flow [2024-06-27 21:06:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 1448 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:16,931 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1110 flow [2024-06-27 21:06:16,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1110, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-27 21:06:16,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 21:06:16,932 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1110 flow [2024-06-27 21:06:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:16,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:16,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:16,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:06:16,932 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:16,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:16,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1486653466, now seen corresponding path program 2 times [2024-06-27 21:06:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:16,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195689369] [2024-06-27 21:06:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195689369] [2024-06-27 21:06:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195689369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:20,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043646925] [2024-06-27 21:06:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:20,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:20,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:20,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:20,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:20,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:21,557 INFO L124 PetriNetUnfolderBase]: 1377/2166 cut-off events. [2024-06-27 21:06:21,558 INFO L125 PetriNetUnfolderBase]: For 28314/28316 co-relation queries the response was YES. [2024-06-27 21:06:21,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11513 conditions, 2166 events. 1377/2166 cut-off events. For 28314/28316 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10546 event pairs, 395 based on Foata normal form. 2/2165 useless extension candidates. Maximal degree in co-relation 11466. Up to 1795 conditions per place. [2024-06-27 21:06:21,574 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 50 changer transitions 0/183 dead transitions. [2024-06-27 21:06:21,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 183 transitions, 1808 flow [2024-06-27 21:06:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:06:21,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:06:21,578 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1110 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:06:21,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 183 transitions, 1808 flow [2024-06-27 21:06:21,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 183 transitions, 1754 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:21,623 INFO L231 Difference]: Finished difference. Result has 112 places, 146 transitions, 1320 flow [2024-06-27 21:06:21,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=112, PETRI_TRANSITIONS=146} [2024-06-27 21:06:21,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 21:06:21,624 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 146 transitions, 1320 flow [2024-06-27 21:06:21,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:21,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:21,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:06:21,625 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:21,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash -710487168, now seen corresponding path program 3 times [2024-06-27 21:06:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058260007] [2024-06-27 21:06:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:24,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058260007] [2024-06-27 21:06:24,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058260007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:24,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42655107] [2024-06-27 21:06:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:24,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:24,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 146 transitions, 1320 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:24,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:24,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:24,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:26,122 INFO L124 PetriNetUnfolderBase]: 1372/2159 cut-off events. [2024-06-27 21:06:26,122 INFO L125 PetriNetUnfolderBase]: For 31931/31933 co-relation queries the response was YES. [2024-06-27 21:06:26,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 2159 events. 1372/2159 cut-off events. For 31931/31933 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10485 event pairs, 395 based on Foata normal form. 2/2158 useless extension candidates. Maximal degree in co-relation 12117. Up to 1790 conditions per place. [2024-06-27 21:06:26,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 48 changer transitions 0/181 dead transitions. [2024-06-27 21:06:26,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 181 transitions, 1841 flow [2024-06-27 21:06:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 21:06:26,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 21:06:26,141 INFO L175 Difference]: Start difference. First operand has 112 places, 146 transitions, 1320 flow. Second operand 8 states and 151 transitions. [2024-06-27 21:06:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 181 transitions, 1841 flow [2024-06-27 21:06:26,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 181 transitions, 1793 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 21:06:26,190 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1376 flow [2024-06-27 21:06:26,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-27 21:06:26,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 21:06:26,191 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1376 flow [2024-06-27 21:06:26,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:26,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:26,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:26,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:06:26,192 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:26,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash 854031326, now seen corresponding path program 4 times [2024-06-27 21:06:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:26,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085418036] [2024-06-27 21:06:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:28,921 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 21:06:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:28,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085418036] [2024-06-27 21:06:28,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085418036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:28,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:28,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015470738] [2024-06-27 21:06:28,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:28,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:28,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:28,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1376 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:28,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:28,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:30,359 INFO L124 PetriNetUnfolderBase]: 1385/2183 cut-off events. [2024-06-27 21:06:30,359 INFO L125 PetriNetUnfolderBase]: For 35421/35438 co-relation queries the response was YES. [2024-06-27 21:06:30,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12587 conditions, 2183 events. 1385/2183 cut-off events. For 35421/35438 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10586 event pairs, 399 based on Foata normal form. 6/2182 useless extension candidates. Maximal degree in co-relation 12535. Up to 1804 conditions per place. [2024-06-27 21:06:30,374 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 56 changer transitions 0/182 dead transitions. [2024-06-27 21:06:30,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 182 transitions, 1951 flow [2024-06-27 21:06:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:06:30,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:06:30,376 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1376 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:06:30,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 182 transitions, 1951 flow [2024-06-27 21:06:30,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 182 transitions, 1832 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:30,418 INFO L231 Difference]: Finished difference. Result has 121 places, 151 transitions, 1463 flow [2024-06-27 21:06:30,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1463, PETRI_PLACES=121, PETRI_TRANSITIONS=151} [2024-06-27 21:06:30,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 21:06:30,419 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 151 transitions, 1463 flow [2024-06-27 21:06:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:30,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:30,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:06:30,420 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 21:06:30,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash -867507088, now seen corresponding path program 5 times [2024-06-27 21:06:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409754704] [2024-06-27 21:06:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:30,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:33,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:33,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409754704] [2024-06-27 21:06:33,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409754704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:33,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:33,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:33,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663732520] [2024-06-27 21:06:33,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:33,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:33,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:33,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 151 transitions, 1463 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:33,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:33,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:33,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:34,651 INFO L124 PetriNetUnfolderBase]: 1398/2208 cut-off events. [2024-06-27 21:06:34,652 INFO L125 PetriNetUnfolderBase]: For 38716/38733 co-relation queries the response was YES. [2024-06-27 21:06:34,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12967 conditions, 2208 events. 1398/2208 cut-off events. For 38716/38733 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10775 event pairs, 399 based on Foata normal form. 6/2207 useless extension candidates. Maximal degree in co-relation 12913. Up to 1818 conditions per place. [2024-06-27 21:06:34,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 124 selfloop transitions, 56 changer transitions 0/185 dead transitions. [2024-06-27 21:06:34,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 185 transitions, 2030 flow [2024-06-27 21:06:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:06:34,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 21:06:34,671 INFO L175 Difference]: Start difference. First operand has 121 places, 151 transitions, 1463 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:06:34,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 185 transitions, 2030 flow [2024-06-27 21:06:34,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 185 transitions, 1936 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:34,727 INFO L231 Difference]: Finished difference. Result has 125 places, 154 transitions, 1532 flow [2024-06-27 21:06:34,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1532, PETRI_PLACES=125, PETRI_TRANSITIONS=154} [2024-06-27 21:06:34,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-27 21:06:34,728 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 154 transitions, 1532 flow [2024-06-27 21:06:34,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:34,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:34,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:34,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:06:34,729 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:34,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1612204006, now seen corresponding path program 6 times [2024-06-27 21:06:34,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058771761] [2024-06-27 21:06:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:37,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058771761] [2024-06-27 21:06:37,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058771761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:37,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:37,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657976936] [2024-06-27 21:06:37,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:37,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:37,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:37,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:37,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 154 transitions, 1532 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:37,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:37,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:37,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:39,042 INFO L124 PetriNetUnfolderBase]: 1393/2201 cut-off events. [2024-06-27 21:06:39,042 INFO L125 PetriNetUnfolderBase]: For 41363/41380 co-relation queries the response was YES. [2024-06-27 21:06:39,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2201 events. 1393/2201 cut-off events. For 41363/41380 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10756 event pairs, 399 based on Foata normal form. 6/2200 useless extension candidates. Maximal degree in co-relation 12975. Up to 1813 conditions per place. [2024-06-27 21:06:39,057 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 55 changer transitions 0/183 dead transitions. [2024-06-27 21:06:39,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 183 transitions, 1970 flow [2024-06-27 21:06:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:06:39,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:06:39,059 INFO L175 Difference]: Start difference. First operand has 125 places, 154 transitions, 1532 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:06:39,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 183 transitions, 1970 flow [2024-06-27 21:06:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 183 transitions, 1789 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:39,100 INFO L231 Difference]: Finished difference. Result has 126 places, 154 transitions, 1469 flow [2024-06-27 21:06:39,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1469, PETRI_PLACES=126, PETRI_TRANSITIONS=154} [2024-06-27 21:06:39,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 21:06:39,101 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 154 transitions, 1469 flow [2024-06-27 21:06:39,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:39,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:39,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:06:39,101 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:39,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:39,102 INFO L85 PathProgramCache]: Analyzing trace with hash -870935226, now seen corresponding path program 1 times [2024-06-27 21:06:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117744111] [2024-06-27 21:06:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:39,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117744111] [2024-06-27 21:06:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117744111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:42,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:42,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695550025] [2024-06-27 21:06:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:42,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:06:42,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 154 transitions, 1469 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:42,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:42,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:06:42,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:43,696 INFO L124 PetriNetUnfolderBase]: 1399/2236 cut-off events. [2024-06-27 21:06:43,696 INFO L125 PetriNetUnfolderBase]: For 49175/49201 co-relation queries the response was YES. [2024-06-27 21:06:43,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13528 conditions, 2236 events. 1399/2236 cut-off events. For 49175/49201 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11299 event pairs, 227 based on Foata normal form. 20/2210 useless extension candidates. Maximal degree in co-relation 13473. Up to 1805 conditions per place. [2024-06-27 21:06:43,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 47 changer transitions 0/204 dead transitions. [2024-06-27 21:06:43,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2099 flow [2024-06-27 21:06:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:06:43,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 21:06:43,712 INFO L175 Difference]: Start difference. First operand has 126 places, 154 transitions, 1469 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:06:43,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2099 flow [2024-06-27 21:06:43,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 1976 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:43,744 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1507 flow [2024-06-27 21:06:43,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1507, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-27 21:06:43,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 21:06:43,745 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1507 flow [2024-06-27 21:06:43,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:43,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:43,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:43,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:06:43,746 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:43,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1273850588, now seen corresponding path program 2 times [2024-06-27 21:06:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246072281] [2024-06-27 21:06:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:47,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246072281] [2024-06-27 21:06:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246072281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:47,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688647200] [2024-06-27 21:06:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:47,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:47,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:06:47,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1507 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:47,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:47,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:06:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:48,309 INFO L124 PetriNetUnfolderBase]: 1387/2218 cut-off events. [2024-06-27 21:06:48,309 INFO L125 PetriNetUnfolderBase]: For 52001/52034 co-relation queries the response was YES. [2024-06-27 21:06:48,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13561 conditions, 2218 events. 1387/2218 cut-off events. For 52001/52034 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11223 event pairs, 312 based on Foata normal form. 18/2191 useless extension candidates. Maximal degree in co-relation 13505. Up to 1886 conditions per place. [2024-06-27 21:06:48,325 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 127 selfloop transitions, 43 changer transitions 0/196 dead transitions. [2024-06-27 21:06:48,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 196 transitions, 1959 flow [2024-06-27 21:06:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:06:48,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:06:48,327 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1507 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:06:48,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 196 transitions, 1959 flow [2024-06-27 21:06:48,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 196 transitions, 1859 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:48,371 INFO L231 Difference]: Finished difference. Result has 132 places, 158 transitions, 1503 flow [2024-06-27 21:06:48,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1503, PETRI_PLACES=132, PETRI_TRANSITIONS=158} [2024-06-27 21:06:48,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 21:06:48,372 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 158 transitions, 1503 flow [2024-06-27 21:06:48,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:48,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:48,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:48,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:06:48,372 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:48,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:48,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1158559418, now seen corresponding path program 3 times [2024-06-27 21:06:48,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:48,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724874181] [2024-06-27 21:06:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:48,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724874181] [2024-06-27 21:06:51,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724874181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:51,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:51,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:51,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500676609] [2024-06-27 21:06:51,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:51,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:51,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:51,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:51,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:06:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 158 transitions, 1503 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:06:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:53,251 INFO L124 PetriNetUnfolderBase]: 1411/2255 cut-off events. [2024-06-27 21:06:53,251 INFO L125 PetriNetUnfolderBase]: For 56707/56726 co-relation queries the response was YES. [2024-06-27 21:06:53,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13892 conditions, 2255 events. 1411/2255 cut-off events. For 56707/56726 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11443 event pairs, 322 based on Foata normal form. 6/2208 useless extension candidates. Maximal degree in co-relation 13834. Up to 1857 conditions per place. [2024-06-27 21:06:53,274 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 60 changer transitions 0/193 dead transitions. [2024-06-27 21:06:53,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 193 transitions, 1961 flow [2024-06-27 21:06:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:06:53,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:06:53,277 INFO L175 Difference]: Start difference. First operand has 132 places, 158 transitions, 1503 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:06:53,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 193 transitions, 1961 flow [2024-06-27 21:06:53,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 193 transitions, 1865 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:53,326 INFO L231 Difference]: Finished difference. Result has 133 places, 160 transitions, 1571 flow [2024-06-27 21:06:53,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1571, PETRI_PLACES=133, PETRI_TRANSITIONS=160} [2024-06-27 21:06:53,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 21:06:53,327 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 160 transitions, 1571 flow [2024-06-27 21:06:53,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:53,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:53,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:53,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:06:53,327 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:53,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash -550084658, now seen corresponding path program 1 times [2024-06-27 21:06:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:53,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93235371] [2024-06-27 21:06:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:56,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:56,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93235371] [2024-06-27 21:06:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93235371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:56,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217651259] [2024-06-27 21:06:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:56,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:06:56,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 160 transitions, 1571 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:56,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:56,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:06:56,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:57,959 INFO L124 PetriNetUnfolderBase]: 1497/2369 cut-off events. [2024-06-27 21:06:57,959 INFO L125 PetriNetUnfolderBase]: For 56931/56943 co-relation queries the response was YES. [2024-06-27 21:06:57,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14444 conditions, 2369 events. 1497/2369 cut-off events. For 56931/56943 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11825 event pairs, 362 based on Foata normal form. 16/2382 useless extension candidates. Maximal degree in co-relation 14385. Up to 2118 conditions per place. [2024-06-27 21:06:57,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 162 selfloop transitions, 30 changer transitions 0/197 dead transitions. [2024-06-27 21:06:57,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 197 transitions, 2075 flow [2024-06-27 21:06:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:06:57,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:06:57,978 INFO L175 Difference]: Start difference. First operand has 133 places, 160 transitions, 1571 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:06:57,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 197 transitions, 2075 flow [2024-06-27 21:06:58,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 197 transitions, 1931 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:58,079 INFO L231 Difference]: Finished difference. Result has 135 places, 162 transitions, 1514 flow [2024-06-27 21:06:58,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1514, PETRI_PLACES=135, PETRI_TRANSITIONS=162} [2024-06-27 21:06:58,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 21:06:58,080 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 162 transitions, 1514 flow [2024-06-27 21:06:58,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:58,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:58,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:06:58,081 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:58,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash 477089572, now seen corresponding path program 4 times [2024-06-27 21:06:58,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071638359] [2024-06-27 21:06:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:00,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:00,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071638359] [2024-06-27 21:07:00,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071638359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:00,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:00,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:00,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689587768] [2024-06-27 21:07:00,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:00,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:00,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:00,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:01,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 162 transitions, 1514 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:01,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:01,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:01,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:02,349 INFO L124 PetriNetUnfolderBase]: 1422/2271 cut-off events. [2024-06-27 21:07:02,349 INFO L125 PetriNetUnfolderBase]: For 62904/62942 co-relation queries the response was YES. [2024-06-27 21:07:02,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14217 conditions, 2271 events. 1422/2271 cut-off events. For 62904/62942 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11491 event pairs, 326 based on Foata normal form. 10/2221 useless extension candidates. Maximal degree in co-relation 14157. Up to 1873 conditions per place. [2024-06-27 21:07:02,366 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 60 changer transitions 0/194 dead transitions. [2024-06-27 21:07:02,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 194 transitions, 1968 flow [2024-06-27 21:07:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:07:02,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:07:02,367 INFO L175 Difference]: Start difference. First operand has 135 places, 162 transitions, 1514 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:07:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 194 transitions, 1968 flow [2024-06-27 21:07:02,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 194 transitions, 1899 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:02,411 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1613 flow [2024-06-27 21:07:02,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1613, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2024-06-27 21:07:02,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 21:07:02,411 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1613 flow [2024-06-27 21:07:02,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:02,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:02,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:02,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:07:02,412 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:02,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1561291456, now seen corresponding path program 2 times [2024-06-27 21:07:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:02,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825637757] [2024-06-27 21:07:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:02,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825637757] [2024-06-27 21:07:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825637757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:05,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:05,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:05,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849190179] [2024-06-27 21:07:05,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:05,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:05,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:05,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1613 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:05,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:05,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:06,631 INFO L124 PetriNetUnfolderBase]: 1504/2384 cut-off events. [2024-06-27 21:07:06,631 INFO L125 PetriNetUnfolderBase]: For 62749/62777 co-relation queries the response was YES. [2024-06-27 21:07:06,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14732 conditions, 2384 events. 1504/2384 cut-off events. For 62749/62777 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11952 event pairs, 356 based on Foata normal form. 24/2404 useless extension candidates. Maximal degree in co-relation 14671. Up to 2131 conditions per place. [2024-06-27 21:07:06,647 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 30 changer transitions 0/198 dead transitions. [2024-06-27 21:07:06,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 2115 flow [2024-06-27 21:07:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:07:06,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:07:06,648 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1613 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:07:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 2115 flow [2024-06-27 21:07:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 198 transitions, 1967 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:06,701 INFO L231 Difference]: Finished difference. Result has 139 places, 166 transitions, 1556 flow [2024-06-27 21:07:06,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1556, PETRI_PLACES=139, PETRI_TRANSITIONS=166} [2024-06-27 21:07:06,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 21:07:06,702 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 166 transitions, 1556 flow [2024-06-27 21:07:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:06,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:06,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:06,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:07:06,702 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:06,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1789192606, now seen corresponding path program 3 times [2024-06-27 21:07:06,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:06,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289211711] [2024-06-27 21:07:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:09,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:09,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289211711] [2024-06-27 21:07:09,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289211711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:09,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538284305] [2024-06-27 21:07:09,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:09,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:09,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:09,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 166 transitions, 1556 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:09,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:09,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:09,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:10,722 INFO L124 PetriNetUnfolderBase]: 1524/2416 cut-off events. [2024-06-27 21:07:10,722 INFO L125 PetriNetUnfolderBase]: For 66168/66196 co-relation queries the response was YES. [2024-06-27 21:07:10,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14957 conditions, 2416 events. 1524/2416 cut-off events. For 66168/66196 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12123 event pairs, 362 based on Foata normal form. 24/2436 useless extension candidates. Maximal degree in co-relation 14895. Up to 2163 conditions per place. [2024-06-27 21:07:10,737 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 164 selfloop transitions, 31 changer transitions 0/200 dead transitions. [2024-06-27 21:07:10,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 200 transitions, 2066 flow [2024-06-27 21:07:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:07:10,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:07:10,739 INFO L175 Difference]: Start difference. First operand has 139 places, 166 transitions, 1556 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:07:10,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 200 transitions, 2066 flow [2024-06-27 21:07:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 200 transitions, 1993 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:10,796 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1580 flow [2024-06-27 21:07:10,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1580, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-27 21:07:10,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 21:07:10,797 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1580 flow [2024-06-27 21:07:10,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:10,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:10,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:07:10,798 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:10,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1567786576, now seen corresponding path program 4 times [2024-06-27 21:07:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:10,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661002025] [2024-06-27 21:07:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:13,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:13,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661002025] [2024-06-27 21:07:13,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661002025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:13,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:13,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72496413] [2024-06-27 21:07:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:13,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:13,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:13,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1580 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:13,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:13,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:13,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:14,706 INFO L124 PetriNetUnfolderBase]: 1516/2406 cut-off events. [2024-06-27 21:07:14,706 INFO L125 PetriNetUnfolderBase]: For 68828/68856 co-relation queries the response was YES. [2024-06-27 21:07:14,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15034 conditions, 2406 events. 1516/2406 cut-off events. For 68828/68856 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12104 event pairs, 324 based on Foata normal form. 24/2426 useless extension candidates. Maximal degree in co-relation 14971. Up to 2057 conditions per place. [2024-06-27 21:07:14,723 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 38 changer transitions 0/203 dead transitions. [2024-06-27 21:07:14,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 2102 flow [2024-06-27 21:07:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:07:14,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:07:14,725 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1580 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:07:14,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 2102 flow [2024-06-27 21:07:14,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 203 transitions, 2023 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:14,781 INFO L231 Difference]: Finished difference. Result has 143 places, 170 transitions, 1616 flow [2024-06-27 21:07:14,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1616, PETRI_PLACES=143, PETRI_TRANSITIONS=170} [2024-06-27 21:07:14,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 21:07:14,782 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 170 transitions, 1616 flow [2024-06-27 21:07:14,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:14,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:14,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:14,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:07:14,783 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:14,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1078659486, now seen corresponding path program 1 times [2024-06-27 21:07:14,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:14,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505841942] [2024-06-27 21:07:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:14,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:16,449 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 21:07:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505841942] [2024-06-27 21:07:16,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505841942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:16,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:16,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:07:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699788347] [2024-06-27 21:07:16,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:07:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:07:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:07:16,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:16,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 170 transitions, 1616 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:16,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:16,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:16,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:17,341 INFO L124 PetriNetUnfolderBase]: 1393/2266 cut-off events. [2024-06-27 21:07:17,342 INFO L125 PetriNetUnfolderBase]: For 69788/69822 co-relation queries the response was YES. [2024-06-27 21:07:17,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14370 conditions, 2266 events. 1393/2266 cut-off events. For 69788/69822 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11809 event pairs, 356 based on Foata normal form. 34/2296 useless extension candidates. Maximal degree in co-relation 14306. Up to 2030 conditions per place. [2024-06-27 21:07:17,357 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 152 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2024-06-27 21:07:17,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 1994 flow [2024-06-27 21:07:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:07:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:07:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:07:17,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:07:17,358 INFO L175 Difference]: Start difference. First operand has 143 places, 170 transitions, 1616 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:07:17,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 1994 flow [2024-06-27 21:07:17,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 184 transitions, 1897 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:17,406 INFO L231 Difference]: Finished difference. Result has 142 places, 173 transitions, 1575 flow [2024-06-27 21:07:17,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1575, PETRI_PLACES=142, PETRI_TRANSITIONS=173} [2024-06-27 21:07:17,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 21:07:17,407 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 173 transitions, 1575 flow [2024-06-27 21:07:17,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:17,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:17,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:17,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:07:17,407 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:17,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash 753895715, now seen corresponding path program 1 times [2024-06-27 21:07:17,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:17,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557005332] [2024-06-27 21:07:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557005332] [2024-06-27 21:07:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557005332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:21,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:21,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:21,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240645437] [2024-06-27 21:07:21,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:21,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:21,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:21,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 173 transitions, 1575 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:21,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:21,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:21,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:22,647 INFO L124 PetriNetUnfolderBase]: 1654/2650 cut-off events. [2024-06-27 21:07:22,647 INFO L125 PetriNetUnfolderBase]: For 86753/86765 co-relation queries the response was YES. [2024-06-27 21:07:22,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16747 conditions, 2650 events. 1654/2650 cut-off events. For 86753/86765 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13872 event pairs, 269 based on Foata normal form. 24/2672 useless extension candidates. Maximal degree in co-relation 16682. Up to 2052 conditions per place. [2024-06-27 21:07:22,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 28 changer transitions 0/236 dead transitions. [2024-06-27 21:07:22,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 236 transitions, 2407 flow [2024-06-27 21:07:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:07:22,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:07:22,669 INFO L175 Difference]: Start difference. First operand has 142 places, 173 transitions, 1575 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:07:22,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 236 transitions, 2407 flow [2024-06-27 21:07:22,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 236 transitions, 2373 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:22,741 INFO L231 Difference]: Finished difference. Result has 151 places, 178 transitions, 1680 flow [2024-06-27 21:07:22,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1680, PETRI_PLACES=151, PETRI_TRANSITIONS=178} [2024-06-27 21:07:22,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-27 21:07:22,742 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 178 transitions, 1680 flow [2024-06-27 21:07:22,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:22,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:22,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:22,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:07:22,742 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:22,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash 842461475, now seen corresponding path program 2 times [2024-06-27 21:07:22,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:22,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770749342] [2024-06-27 21:07:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:22,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:26,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770749342] [2024-06-27 21:07:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770749342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263282101] [2024-06-27 21:07:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:26,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:26,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 178 transitions, 1680 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:26,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:26,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:26,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:27,844 INFO L124 PetriNetUnfolderBase]: 1702/2734 cut-off events. [2024-06-27 21:07:27,844 INFO L125 PetriNetUnfolderBase]: For 92751/92763 co-relation queries the response was YES. [2024-06-27 21:07:27,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17497 conditions, 2734 events. 1702/2734 cut-off events. For 92751/92763 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14453 event pairs, 368 based on Foata normal form. 24/2756 useless extension candidates. Maximal degree in co-relation 17429. Up to 2230 conditions per place. [2024-06-27 21:07:27,862 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 26 changer transitions 0/232 dead transitions. [2024-06-27 21:07:27,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 232 transitions, 2471 flow [2024-06-27 21:07:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:07:27,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:07:27,864 INFO L175 Difference]: Start difference. First operand has 151 places, 178 transitions, 1680 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:07:27,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 232 transitions, 2471 flow [2024-06-27 21:07:27,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 232 transitions, 2417 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:27,949 INFO L231 Difference]: Finished difference. Result has 156 places, 181 transitions, 1737 flow [2024-06-27 21:07:27,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=156, PETRI_TRANSITIONS=181} [2024-06-27 21:07:27,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 21:07:27,950 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 181 transitions, 1737 flow [2024-06-27 21:07:27,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:27,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:27,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:27,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:07:27,950 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:27,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:27,951 INFO L85 PathProgramCache]: Analyzing trace with hash 842609345, now seen corresponding path program 3 times [2024-06-27 21:07:27,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:27,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747393743] [2024-06-27 21:07:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:31,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:31,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747393743] [2024-06-27 21:07:31,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747393743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:31,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:31,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:31,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508859875] [2024-06-27 21:07:31,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:31,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:31,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:31,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:31,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:31,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 181 transitions, 1737 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:31,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:31,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:31,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:32,819 INFO L124 PetriNetUnfolderBase]: 1674/2690 cut-off events. [2024-06-27 21:07:32,820 INFO L125 PetriNetUnfolderBase]: For 92670/92682 co-relation queries the response was YES. [2024-06-27 21:07:32,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17035 conditions, 2690 events. 1674/2690 cut-off events. For 92670/92682 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14169 event pairs, 372 based on Foata normal form. 28/2716 useless extension candidates. Maximal degree in co-relation 16964. Up to 2334 conditions per place. [2024-06-27 21:07:32,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-27 21:07:32,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2357 flow [2024-06-27 21:07:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:07:32,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:07:32,841 INFO L175 Difference]: Start difference. First operand has 156 places, 181 transitions, 1737 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:07:32,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2357 flow [2024-06-27 21:07:32,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 228 transitions, 2287 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:32,912 INFO L231 Difference]: Finished difference. Result has 160 places, 182 transitions, 1750 flow [2024-06-27 21:07:32,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1750, PETRI_PLACES=160, PETRI_TRANSITIONS=182} [2024-06-27 21:07:32,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 21:07:32,913 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 182 transitions, 1750 flow [2024-06-27 21:07:32,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:32,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:32,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:07:32,913 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:32,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 127030699, now seen corresponding path program 4 times [2024-06-27 21:07:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:32,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419776144] [2024-06-27 21:07:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419776144] [2024-06-27 21:07:36,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419776144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:36,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:36,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335816691] [2024-06-27 21:07:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:36,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:36,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:36,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:36,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 182 transitions, 1750 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:36,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:36,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:36,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:38,367 INFO L124 PetriNetUnfolderBase]: 1742/2815 cut-off events. [2024-06-27 21:07:38,367 INFO L125 PetriNetUnfolderBase]: For 97879/97881 co-relation queries the response was YES. [2024-06-27 21:07:38,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17641 conditions, 2815 events. 1742/2815 cut-off events. For 97879/97881 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15184 event pairs, 406 based on Foata normal form. 16/2828 useless extension candidates. Maximal degree in co-relation 17568. Up to 2290 conditions per place. [2024-06-27 21:07:38,390 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 58 changer transitions 0/224 dead transitions. [2024-06-27 21:07:38,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2338 flow [2024-06-27 21:07:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:07:38,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:07:38,392 INFO L175 Difference]: Start difference. First operand has 160 places, 182 transitions, 1750 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:07:38,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2338 flow [2024-06-27 21:07:38,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 224 transitions, 2289 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:38,476 INFO L231 Difference]: Finished difference. Result has 162 places, 183 transitions, 1844 flow [2024-06-27 21:07:38,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1844, PETRI_PLACES=162, PETRI_TRANSITIONS=183} [2024-06-27 21:07:38,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 21:07:38,476 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 183 transitions, 1844 flow [2024-06-27 21:07:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:38,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:38,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:38,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:07:38,477 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:38,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash 121668319, now seen corresponding path program 5 times [2024-06-27 21:07:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517874701] [2024-06-27 21:07:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:42,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517874701] [2024-06-27 21:07:42,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517874701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:42,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:42,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:42,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086724356] [2024-06-27 21:07:42,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:42,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:42,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:42,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:42,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 183 transitions, 1844 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:42,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:42,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:42,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:43,869 INFO L124 PetriNetUnfolderBase]: 1810/2943 cut-off events. [2024-06-27 21:07:43,869 INFO L125 PetriNetUnfolderBase]: For 104487/104489 co-relation queries the response was YES. [2024-06-27 21:07:43,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2943 events. 1810/2943 cut-off events. For 104487/104489 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16182 event pairs, 424 based on Foata normal form. 16/2956 useless extension candidates. Maximal degree in co-relation 18427. Up to 2406 conditions per place. [2024-06-27 21:07:43,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 56 changer transitions 0/225 dead transitions. [2024-06-27 21:07:43,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 225 transitions, 2436 flow [2024-06-27 21:07:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:07:43,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:07:43,894 INFO L175 Difference]: Start difference. First operand has 162 places, 183 transitions, 1844 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:07:43,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 225 transitions, 2436 flow [2024-06-27 21:07:43,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 225 transitions, 2311 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:43,994 INFO L231 Difference]: Finished difference. Result has 164 places, 184 transitions, 1860 flow [2024-06-27 21:07:43,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1860, PETRI_PLACES=164, PETRI_TRANSITIONS=184} [2024-06-27 21:07:43,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 21:07:43,995 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 184 transitions, 1860 flow [2024-06-27 21:07:43,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:43,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:43,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:07:43,995 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:43,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1555602289, now seen corresponding path program 6 times [2024-06-27 21:07:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:43,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247237885] [2024-06-27 21:07:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:43,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247237885] [2024-06-27 21:07:47,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247237885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:47,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:47,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:47,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242451101] [2024-06-27 21:07:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:47,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:47,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 184 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:47,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:47,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:47,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:49,256 INFO L124 PetriNetUnfolderBase]: 1858/3027 cut-off events. [2024-06-27 21:07:49,256 INFO L125 PetriNetUnfolderBase]: For 107814/107816 co-relation queries the response was YES. [2024-06-27 21:07:49,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18945 conditions, 3027 events. 1858/3027 cut-off events. For 107814/107816 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16854 event pairs, 416 based on Foata normal form. 12/3036 useless extension candidates. Maximal degree in co-relation 18870. Up to 2272 conditions per place. [2024-06-27 21:07:49,276 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 59 changer transitions 0/231 dead transitions. [2024-06-27 21:07:49,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 231 transitions, 2506 flow [2024-06-27 21:07:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:07:49,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:07:49,278 INFO L175 Difference]: Start difference. First operand has 164 places, 184 transitions, 1860 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:07:49,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 231 transitions, 2506 flow [2024-06-27 21:07:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 231 transitions, 2383 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:49,388 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 1922 flow [2024-06-27 21:07:49,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1922, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2024-06-27 21:07:49,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 21:07:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 1922 flow [2024-06-27 21:07:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:49,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:49,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:49,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:07:49,390 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1549876837, now seen corresponding path program 1 times [2024-06-27 21:07:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648866908] [2024-06-27 21:07:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:52,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:52,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648866908] [2024-06-27 21:07:52,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648866908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:52,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:52,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290576689] [2024-06-27 21:07:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:52,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:52,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:52,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:52,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 1922 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:52,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:52,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:52,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:54,301 INFO L124 PetriNetUnfolderBase]: 1906/3111 cut-off events. [2024-06-27 21:07:54,301 INFO L125 PetriNetUnfolderBase]: For 113990/113992 co-relation queries the response was YES. [2024-06-27 21:07:54,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19504 conditions, 3111 events. 1906/3111 cut-off events. For 113990/113992 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17431 event pairs, 426 based on Foata normal form. 12/3120 useless extension candidates. Maximal degree in co-relation 19427. Up to 2244 conditions per place. [2024-06-27 21:07:54,324 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 62 changer transitions 0/232 dead transitions. [2024-06-27 21:07:54,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 232 transitions, 2550 flow [2024-06-27 21:07:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:07:54,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:07:54,326 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 1922 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:07:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 232 transitions, 2550 flow [2024-06-27 21:07:54,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 232 transitions, 2457 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:54,448 INFO L231 Difference]: Finished difference. Result has 171 places, 188 transitions, 1985 flow [2024-06-27 21:07:54,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1985, PETRI_PLACES=171, PETRI_TRANSITIONS=188} [2024-06-27 21:07:54,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 21:07:54,449 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 188 transitions, 1985 flow [2024-06-27 21:07:54,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:54,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:54,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:54,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:07:54,450 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:54,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1910386395, now seen corresponding path program 7 times [2024-06-27 21:07:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:54,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689597387] [2024-06-27 21:07:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:57,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:57,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689597387] [2024-06-27 21:07:57,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689597387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:57,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:57,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:57,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562278925] [2024-06-27 21:07:57,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:57,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:57,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:57,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:57,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:57,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 188 transitions, 1985 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:57,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:57,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:57,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:59,654 INFO L124 PetriNetUnfolderBase]: 1974/3238 cut-off events. [2024-06-27 21:07:59,654 INFO L125 PetriNetUnfolderBase]: For 123604/123621 co-relation queries the response was YES. [2024-06-27 21:07:59,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20422 conditions, 3238 events. 1974/3238 cut-off events. For 123604/123621 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18523 event pairs, 470 based on Foata normal form. 20/3251 useless extension candidates. Maximal degree in co-relation 20343. Up to 2690 conditions per place. [2024-06-27 21:07:59,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 56 changer transitions 0/227 dead transitions. [2024-06-27 21:07:59,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 227 transitions, 2579 flow [2024-06-27 21:07:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:07:59,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:07:59,682 INFO L175 Difference]: Start difference. First operand has 171 places, 188 transitions, 1985 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:07:59,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 227 transitions, 2579 flow [2024-06-27 21:07:59,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 2437 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:59,790 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 1990 flow [2024-06-27 21:07:59,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1990, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2024-06-27 21:07:59,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 21:07:59,791 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 1990 flow [2024-06-27 21:07:59,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:59,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:59,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:07:59,791 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:59,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1160815967, now seen corresponding path program 8 times [2024-06-27 21:07:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108041110] [2024-06-27 21:07:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:03,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:03,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108041110] [2024-06-27 21:08:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108041110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:03,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684795050] [2024-06-27 21:08:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:03,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:03,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 1990 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:03,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:03,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:04,909 INFO L124 PetriNetUnfolderBase]: 2042/3354 cut-off events. [2024-06-27 21:08:04,909 INFO L125 PetriNetUnfolderBase]: For 130405/130422 co-relation queries the response was YES. [2024-06-27 21:08:04,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21010 conditions, 3354 events. 2042/3354 cut-off events. For 130405/130422 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19430 event pairs, 482 based on Foata normal form. 20/3367 useless extension candidates. Maximal degree in co-relation 20930. Up to 2806 conditions per place. [2024-06-27 21:08:04,933 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 163 selfloop transitions, 60 changer transitions 0/228 dead transitions. [2024-06-27 21:08:04,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 228 transitions, 2588 flow [2024-06-27 21:08:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:08:04,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:08:04,935 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 1990 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:08:04,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 228 transitions, 2588 flow [2024-06-27 21:08:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 228 transitions, 2459 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:05,053 INFO L231 Difference]: Finished difference. Result has 175 places, 190 transitions, 2018 flow [2024-06-27 21:08:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2018, PETRI_PLACES=175, PETRI_TRANSITIONS=190} [2024-06-27 21:08:05,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 21:08:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 190 transitions, 2018 flow [2024-06-27 21:08:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:05,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:08:05,054 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1149818413, now seen corresponding path program 9 times [2024-06-27 21:08:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:05,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705980817] [2024-06-27 21:08:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:08,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705980817] [2024-06-27 21:08:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705980817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:08,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271874067] [2024-06-27 21:08:08,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:08,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:08,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 190 transitions, 2018 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:08,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:08,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:08,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:10,281 INFO L124 PetriNetUnfolderBase]: 2110/3482 cut-off events. [2024-06-27 21:08:10,281 INFO L125 PetriNetUnfolderBase]: For 137232/137249 co-relation queries the response was YES. [2024-06-27 21:08:10,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21680 conditions, 3482 events. 2110/3482 cut-off events. For 137232/137249 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20462 event pairs, 500 based on Foata normal form. 20/3495 useless extension candidates. Maximal degree in co-relation 21599. Up to 2922 conditions per place. [2024-06-27 21:08:10,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 57 changer transitions 0/229 dead transitions. [2024-06-27 21:08:10,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 229 transitions, 2620 flow [2024-06-27 21:08:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:08:10,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:08:10,313 INFO L175 Difference]: Start difference. First operand has 175 places, 190 transitions, 2018 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:08:10,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 229 transitions, 2620 flow [2024-06-27 21:08:10,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 229 transitions, 2481 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:10,436 INFO L231 Difference]: Finished difference. Result has 177 places, 191 transitions, 2032 flow [2024-06-27 21:08:10,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=177, PETRI_TRANSITIONS=191} [2024-06-27 21:08:10,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 21:08:10,437 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 191 transitions, 2032 flow [2024-06-27 21:08:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:10,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:10,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:08:10,438 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:10,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1149670543, now seen corresponding path program 10 times [2024-06-27 21:08:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:10,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651259255] [2024-06-27 21:08:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:13,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651259255] [2024-06-27 21:08:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651259255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:13,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:13,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905523461] [2024-06-27 21:08:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:13,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:13,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 191 transitions, 2032 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:13,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:13,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:13,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:15,564 INFO L124 PetriNetUnfolderBase]: 2130/3522 cut-off events. [2024-06-27 21:08:15,564 INFO L125 PetriNetUnfolderBase]: For 136774/136791 co-relation queries the response was YES. [2024-06-27 21:08:15,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21686 conditions, 3522 events. 2130/3522 cut-off events. For 136774/136791 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20733 event pairs, 490 based on Foata normal form. 16/3531 useless extension candidates. Maximal degree in co-relation 21604. Up to 2632 conditions per place. [2024-06-27 21:08:15,594 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 61 changer transitions 0/235 dead transitions. [2024-06-27 21:08:15,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 235 transitions, 2698 flow [2024-06-27 21:08:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:08:15,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:08:15,596 INFO L175 Difference]: Start difference. First operand has 177 places, 191 transitions, 2032 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:08:15,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 235 transitions, 2698 flow [2024-06-27 21:08:15,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 235 transitions, 2563 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:15,724 INFO L231 Difference]: Finished difference. Result has 180 places, 194 transitions, 2109 flow [2024-06-27 21:08:15,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2109, PETRI_PLACES=180, PETRI_TRANSITIONS=194} [2024-06-27 21:08:15,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 21:08:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 194 transitions, 2109 flow [2024-06-27 21:08:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:15,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:15,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:08:15,726 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:15,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1155395995, now seen corresponding path program 2 times [2024-06-27 21:08:15,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:15,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454657683] [2024-06-27 21:08:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:15,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454657683] [2024-06-27 21:08:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454657683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:19,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:19,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187755037] [2024-06-27 21:08:19,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:19,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:19,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:19,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:19,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 194 transitions, 2109 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:19,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:19,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:19,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:21,086 INFO L124 PetriNetUnfolderBase]: 2178/3618 cut-off events. [2024-06-27 21:08:21,086 INFO L125 PetriNetUnfolderBase]: For 143385/143402 co-relation queries the response was YES. [2024-06-27 21:08:21,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22255 conditions, 3618 events. 2178/3618 cut-off events. For 143385/143402 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21538 event pairs, 510 based on Foata normal form. 16/3627 useless extension candidates. Maximal degree in co-relation 22171. Up to 2828 conditions per place. [2024-06-27 21:08:21,114 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 59 changer transitions 0/236 dead transitions. [2024-06-27 21:08:21,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 236 transitions, 2747 flow [2024-06-27 21:08:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:08:21,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:08:21,116 INFO L175 Difference]: Start difference. First operand has 180 places, 194 transitions, 2109 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:08:21,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 236 transitions, 2747 flow [2024-06-27 21:08:21,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 236 transitions, 2634 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:21,284 INFO L231 Difference]: Finished difference. Result has 184 places, 195 transitions, 2156 flow [2024-06-27 21:08:21,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=184, PETRI_TRANSITIONS=195} [2024-06-27 21:08:21,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 21:08:21,285 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 195 transitions, 2156 flow [2024-06-27 21:08:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:21,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:21,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:08:21,285 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:21,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash -369602947, now seen corresponding path program 3 times [2024-06-27 21:08:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341217877] [2024-06-27 21:08:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:24,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341217877] [2024-06-27 21:08:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341217877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:24,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:24,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404663946] [2024-06-27 21:08:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:24,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:24,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:24,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 195 transitions, 2156 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:24,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:24,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:24,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:25,979 INFO L124 PetriNetUnfolderBase]: 2226/3714 cut-off events. [2024-06-27 21:08:25,979 INFO L125 PetriNetUnfolderBase]: For 150083/150100 co-relation queries the response was YES. [2024-06-27 21:08:25,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22944 conditions, 3714 events. 2226/3714 cut-off events. For 150083/150100 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22303 event pairs, 528 based on Foata normal form. 16/3723 useless extension candidates. Maximal degree in co-relation 22858. Up to 3024 conditions per place. [2024-06-27 21:08:26,011 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 62 changer transitions 0/237 dead transitions. [2024-06-27 21:08:26,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 237 transitions, 2798 flow [2024-06-27 21:08:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:08:26,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:08:26,013 INFO L175 Difference]: Start difference. First operand has 184 places, 195 transitions, 2156 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:08:26,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 237 transitions, 2798 flow [2024-06-27 21:08:26,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 237 transitions, 2652 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:26,254 INFO L231 Difference]: Finished difference. Result has 186 places, 196 transitions, 2178 flow [2024-06-27 21:08:26,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2178, PETRI_PLACES=186, PETRI_TRANSITIONS=196} [2024-06-27 21:08:26,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 21:08:26,254 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 196 transitions, 2178 flow [2024-06-27 21:08:26,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:26,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:26,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:26,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:08:26,255 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 21:08:26,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash -362193637, now seen corresponding path program 4 times [2024-06-27 21:08:26,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:26,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178846443] [2024-06-27 21:08:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:29,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:29,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178846443] [2024-06-27 21:08:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178846443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:29,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631972100] [2024-06-27 21:08:29,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:29,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:29,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:29,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 196 transitions, 2178 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:29,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:29,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:29,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:31,100 INFO L124 PetriNetUnfolderBase]: 2206/3682 cut-off events. [2024-06-27 21:08:31,100 INFO L125 PetriNetUnfolderBase]: For 144126/144143 co-relation queries the response was YES. [2024-06-27 21:08:31,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22236 conditions, 3682 events. 2206/3682 cut-off events. For 144126/144143 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22062 event pairs, 463 based on Foata normal form. 16/3691 useless extension candidates. Maximal degree in co-relation 22149. Up to 2086 conditions per place. [2024-06-27 21:08:31,131 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 74 changer transitions 0/237 dead transitions. [2024-06-27 21:08:31,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 237 transitions, 2700 flow [2024-06-27 21:08:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:08:31,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:08:31,133 INFO L175 Difference]: Start difference. First operand has 186 places, 196 transitions, 2178 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:08:31,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 237 transitions, 2700 flow [2024-06-27 21:08:31,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 237 transitions, 2546 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:31,322 INFO L231 Difference]: Finished difference. Result has 187 places, 195 transitions, 2090 flow [2024-06-27 21:08:31,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2090, PETRI_PLACES=187, PETRI_TRANSITIONS=195} [2024-06-27 21:08:31,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 21:08:31,322 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 195 transitions, 2090 flow [2024-06-27 21:08:31,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:31,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:31,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:31,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:08:31,323 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:31,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2140985025, now seen corresponding path program 1 times [2024-06-27 21:08:31,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:31,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171764240] [2024-06-27 21:08:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:31,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:34,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:34,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171764240] [2024-06-27 21:08:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171764240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:34,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:34,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:34,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733650238] [2024-06-27 21:08:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:34,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:34,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:34,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 195 transitions, 2090 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:34,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:34,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:34,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:35,445 INFO L124 PetriNetUnfolderBase]: 2058/3479 cut-off events. [2024-06-27 21:08:35,446 INFO L125 PetriNetUnfolderBase]: For 140490/140524 co-relation queries the response was YES. [2024-06-27 21:08:35,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21265 conditions, 3479 events. 2058/3479 cut-off events. For 140490/140524 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21276 event pairs, 481 based on Foata normal form. 40/3480 useless extension candidates. Maximal degree in co-relation 21177. Up to 3087 conditions per place. [2024-06-27 21:08:35,477 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 157 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2024-06-27 21:08:35,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 226 transitions, 2722 flow [2024-06-27 21:08:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:08:35,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:08:35,479 INFO L175 Difference]: Start difference. First operand has 187 places, 195 transitions, 2090 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:08:35,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 226 transitions, 2722 flow [2024-06-27 21:08:35,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 226 transitions, 2436 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:35,648 INFO L231 Difference]: Finished difference. Result has 185 places, 203 transitions, 1988 flow [2024-06-27 21:08:35,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1988, PETRI_PLACES=185, PETRI_TRANSITIONS=203} [2024-06-27 21:08:35,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 21:08:35,649 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 203 transitions, 1988 flow [2024-06-27 21:08:35,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:35,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:35,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:35,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:08:35,649 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:35,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -437664773, now seen corresponding path program 2 times [2024-06-27 21:08:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:35,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106816135] [2024-06-27 21:08:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:37,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:37,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106816135] [2024-06-27 21:08:37,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106816135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:37,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:37,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:37,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954084446] [2024-06-27 21:08:37,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:38,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:38,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 203 transitions, 1988 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:38,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:38,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:39,216 INFO L124 PetriNetUnfolderBase]: 2046/3466 cut-off events. [2024-06-27 21:08:39,216 INFO L125 PetriNetUnfolderBase]: For 134815/134837 co-relation queries the response was YES. [2024-06-27 21:08:39,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20145 conditions, 3466 events. 2046/3466 cut-off events. For 134815/134837 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21300 event pairs, 488 based on Foata normal form. 22/3449 useless extension candidates. Maximal degree in co-relation 20059. Up to 3061 conditions per place. [2024-06-27 21:08:39,245 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 149 selfloop transitions, 49 changer transitions 0/220 dead transitions. [2024-06-27 21:08:39,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 220 transitions, 2544 flow [2024-06-27 21:08:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:08:39,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:08:39,246 INFO L175 Difference]: Start difference. First operand has 185 places, 203 transitions, 1988 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:08:39,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 220 transitions, 2544 flow [2024-06-27 21:08:39,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 220 transitions, 2472 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:39,417 INFO L231 Difference]: Finished difference. Result has 187 places, 206 transitions, 2060 flow [2024-06-27 21:08:39,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2060, PETRI_PLACES=187, PETRI_TRANSITIONS=206} [2024-06-27 21:08:39,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 21:08:39,418 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 206 transitions, 2060 flow [2024-06-27 21:08:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:39,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:39,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:39,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:08:39,418 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:39,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -438080483, now seen corresponding path program 3 times [2024-06-27 21:08:39,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:39,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423747223] [2024-06-27 21:08:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:39,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:42,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:42,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423747223] [2024-06-27 21:08:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423747223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:42,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:42,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961068184] [2024-06-27 21:08:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:42,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:42,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:42,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:42,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:42,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:42,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 206 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:42,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:42,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:42,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:43,192 INFO L124 PetriNetUnfolderBase]: 2035/3463 cut-off events. [2024-06-27 21:08:43,192 INFO L125 PetriNetUnfolderBase]: For 131334/131345 co-relation queries the response was YES. [2024-06-27 21:08:43,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20231 conditions, 3463 events. 2035/3463 cut-off events. For 131334/131345 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21362 event pairs, 478 based on Foata normal form. 13/3448 useless extension candidates. Maximal degree in co-relation 20145. Up to 3067 conditions per place. [2024-06-27 21:08:43,219 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 158 selfloop transitions, 45 changer transitions 0/225 dead transitions. [2024-06-27 21:08:43,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 225 transitions, 2518 flow [2024-06-27 21:08:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:08:43,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:08:43,220 INFO L175 Difference]: Start difference. First operand has 187 places, 206 transitions, 2060 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:08:43,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 225 transitions, 2518 flow [2024-06-27 21:08:43,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 225 transitions, 2390 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:43,398 INFO L231 Difference]: Finished difference. Result has 189 places, 206 transitions, 2043 flow [2024-06-27 21:08:43,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2043, PETRI_PLACES=189, PETRI_TRANSITIONS=206} [2024-06-27 21:08:43,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 21:08:43,399 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 206 transitions, 2043 flow [2024-06-27 21:08:43,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:43,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:43,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:43,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:08:43,399 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:43,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1335487565, now seen corresponding path program 1 times [2024-06-27 21:08:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:43,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872113747] [2024-06-27 21:08:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872113747] [2024-06-27 21:08:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872113747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:45,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:45,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026728445] [2024-06-27 21:08:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:45,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:45,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:45,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:45,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 206 transitions, 2043 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:45,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:45,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:45,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:46,959 INFO L124 PetriNetUnfolderBase]: 2197/3675 cut-off events. [2024-06-27 21:08:46,959 INFO L125 PetriNetUnfolderBase]: For 134469/134471 co-relation queries the response was YES. [2024-06-27 21:08:46,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21296 conditions, 3675 events. 2197/3675 cut-off events. For 134469/134471 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22248 event pairs, 522 based on Foata normal form. 1/3674 useless extension candidates. Maximal degree in co-relation 21209. Up to 3434 conditions per place. [2024-06-27 21:08:46,988 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 21 changer transitions 0/233 dead transitions. [2024-06-27 21:08:46,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 2739 flow [2024-06-27 21:08:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:08:46,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:08:46,990 INFO L175 Difference]: Start difference. First operand has 189 places, 206 transitions, 2043 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:08:46,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 2739 flow [2024-06-27 21:08:47,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 2631 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:47,153 INFO L231 Difference]: Finished difference. Result has 190 places, 212 transitions, 2079 flow [2024-06-27 21:08:47,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2079, PETRI_PLACES=190, PETRI_TRANSITIONS=212} [2024-06-27 21:08:47,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 21:08:47,154 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 212 transitions, 2079 flow [2024-06-27 21:08:47,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:47,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:47,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:47,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:08:47,154 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:47,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1327339653, now seen corresponding path program 2 times [2024-06-27 21:08:47,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:47,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920967997] [2024-06-27 21:08:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:47,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:49,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:49,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920967997] [2024-06-27 21:08:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920967997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:49,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14747047] [2024-06-27 21:08:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:49,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:49,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 212 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:49,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:49,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:49,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:50,717 INFO L124 PetriNetUnfolderBase]: 2207/3691 cut-off events. [2024-06-27 21:08:50,717 INFO L125 PetriNetUnfolderBase]: For 135401/135403 co-relation queries the response was YES. [2024-06-27 21:08:50,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21551 conditions, 3691 events. 2207/3691 cut-off events. For 135401/135403 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22369 event pairs, 522 based on Foata normal form. 1/3690 useless extension candidates. Maximal degree in co-relation 21464. Up to 3462 conditions per place. [2024-06-27 21:08:50,748 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2024-06-27 21:08:50,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 234 transitions, 2659 flow [2024-06-27 21:08:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:08:50,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 21:08:50,750 INFO L175 Difference]: Start difference. First operand has 190 places, 212 transitions, 2079 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:08:50,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 234 transitions, 2659 flow [2024-06-27 21:08:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 234 transitions, 2591 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:50,940 INFO L231 Difference]: Finished difference. Result has 194 places, 218 transitions, 2139 flow [2024-06-27 21:08:50,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2139, PETRI_PLACES=194, PETRI_TRANSITIONS=218} [2024-06-27 21:08:50,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 21:08:50,940 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 218 transitions, 2139 flow [2024-06-27 21:08:50,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:50,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:50,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:50,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:08:50,941 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:50,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:50,942 INFO L85 PathProgramCache]: Analyzing trace with hash -638264471, now seen corresponding path program 1 times [2024-06-27 21:08:50,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:50,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499803335] [2024-06-27 21:08:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499803335] [2024-06-27 21:08:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499803335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171968342] [2024-06-27 21:08:52,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:52,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:52,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:53,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:53,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 218 transitions, 2139 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:53,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:54,457 INFO L124 PetriNetUnfolderBase]: 2217/3705 cut-off events. [2024-06-27 21:08:54,457 INFO L125 PetriNetUnfolderBase]: For 141934/141936 co-relation queries the response was YES. [2024-06-27 21:08:54,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21760 conditions, 3705 events. 2217/3705 cut-off events. For 141934/141936 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22424 event pairs, 518 based on Foata normal form. 2/3705 useless extension candidates. Maximal degree in co-relation 21671. Up to 3454 conditions per place. [2024-06-27 21:08:54,489 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 23 changer transitions 0/244 dead transitions. [2024-06-27 21:08:54,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 244 transitions, 2845 flow [2024-06-27 21:08:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:08:54,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:08:54,491 INFO L175 Difference]: Start difference. First operand has 194 places, 218 transitions, 2139 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:08:54,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 244 transitions, 2845 flow [2024-06-27 21:08:54,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 244 transitions, 2777 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:54,701 INFO L231 Difference]: Finished difference. Result has 197 places, 224 transitions, 2209 flow [2024-06-27 21:08:54,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=197, PETRI_TRANSITIONS=224} [2024-06-27 21:08:54,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 21:08:54,701 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 224 transitions, 2209 flow [2024-06-27 21:08:54,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:54,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:54,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:54,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:08:54,702 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:54,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -437658821, now seen corresponding path program 2 times [2024-06-27 21:08:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:54,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444430639] [2024-06-27 21:08:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:56,702 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 21:08:56,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444430639] [2024-06-27 21:08:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444430639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:56,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:56,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:56,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49170850] [2024-06-27 21:08:56,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:56,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:56,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:56,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:56,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:56,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 224 transitions, 2209 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:56,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:56,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:56,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:58,016 INFO L124 PetriNetUnfolderBase]: 2227/3720 cut-off events. [2024-06-27 21:08:58,017 INFO L125 PetriNetUnfolderBase]: For 148276/148280 co-relation queries the response was YES. [2024-06-27 21:08:58,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22145 conditions, 3720 events. 2227/3720 cut-off events. For 148276/148280 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22486 event pairs, 524 based on Foata normal form. 4/3722 useless extension candidates. Maximal degree in co-relation 22055. Up to 3464 conditions per place. [2024-06-27 21:08:58,045 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2024-06-27 21:08:58,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 241 transitions, 2861 flow [2024-06-27 21:08:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:08:58,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 21:08:58,047 INFO L175 Difference]: Start difference. First operand has 197 places, 224 transitions, 2209 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:08:58,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 241 transitions, 2861 flow [2024-06-27 21:08:58,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 241 transitions, 2805 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:58,260 INFO L231 Difference]: Finished difference. Result has 200 places, 227 transitions, 2255 flow [2024-06-27 21:08:58,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2255, PETRI_PLACES=200, PETRI_TRANSITIONS=227} [2024-06-27 21:08:58,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-27 21:08:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 227 transitions, 2255 flow [2024-06-27 21:08:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:58,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:58,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:08:58,261 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:58,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash -437895971, now seen corresponding path program 3 times [2024-06-27 21:08:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733823293] [2024-06-27 21:08:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:00,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:00,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733823293] [2024-06-27 21:09:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733823293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:00,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:00,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:00,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877907519] [2024-06-27 21:09:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:00,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:00,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 227 transitions, 2255 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:01,528 INFO L124 PetriNetUnfolderBase]: 2221/3711 cut-off events. [2024-06-27 21:09:01,528 INFO L125 PetriNetUnfolderBase]: For 150841/150843 co-relation queries the response was YES. [2024-06-27 21:09:01,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22115 conditions, 3711 events. 2221/3711 cut-off events. For 150841/150843 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22442 event pairs, 518 based on Foata normal form. 2/3711 useless extension candidates. Maximal degree in co-relation 22023. Up to 3459 conditions per place. [2024-06-27 21:09:01,561 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 214 selfloop transitions, 26 changer transitions 0/245 dead transitions. [2024-06-27 21:09:01,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 245 transitions, 2783 flow [2024-06-27 21:09:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:09:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:09:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:09:01,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:09:01,562 INFO L175 Difference]: Start difference. First operand has 200 places, 227 transitions, 2255 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:09:01,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 245 transitions, 2783 flow [2024-06-27 21:09:01,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 245 transitions, 2689 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:01,700 INFO L231 Difference]: Finished difference. Result has 203 places, 227 transitions, 2223 flow [2024-06-27 21:09:01,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2223, PETRI_PLACES=203, PETRI_TRANSITIONS=227} [2024-06-27 21:09:01,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 21:09:01,700 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 227 transitions, 2223 flow [2024-06-27 21:09:01,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:01,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:01,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:09:01,701 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:01,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1970328815, now seen corresponding path program 3 times [2024-06-27 21:09:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:01,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289625761] [2024-06-27 21:09:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:03,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:03,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289625761] [2024-06-27 21:09:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289625761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:03,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:03,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841886304] [2024-06-27 21:09:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:03,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:03,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 227 transitions, 2223 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:03,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:03,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:03,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:05,224 INFO L124 PetriNetUnfolderBase]: 2218/3707 cut-off events. [2024-06-27 21:09:05,224 INFO L125 PetriNetUnfolderBase]: For 153282/153284 co-relation queries the response was YES. [2024-06-27 21:09:05,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22066 conditions, 3707 events. 2218/3707 cut-off events. For 153282/153284 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22419 event pairs, 522 based on Foata normal form. 1/3706 useless extension candidates. Maximal degree in co-relation 21973. Up to 3464 conditions per place. [2024-06-27 21:09:05,259 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 24 changer transitions 0/246 dead transitions. [2024-06-27 21:09:05,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 246 transitions, 2759 flow [2024-06-27 21:09:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:09:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:09:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:09:05,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:09:05,260 INFO L175 Difference]: Start difference. First operand has 203 places, 227 transitions, 2223 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:09:05,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 246 transitions, 2759 flow [2024-06-27 21:09:05,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 246 transitions, 2673 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:05,491 INFO L231 Difference]: Finished difference. Result has 203 places, 227 transitions, 2199 flow [2024-06-27 21:09:05,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2199, PETRI_PLACES=203, PETRI_TRANSITIONS=227} [2024-06-27 21:09:05,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 21:09:05,492 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 227 transitions, 2199 flow [2024-06-27 21:09:05,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:05,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:05,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:05,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:09:05,492 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:05,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash -437649893, now seen corresponding path program 1 times [2024-06-27 21:09:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484794612] [2024-06-27 21:09:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:05,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:08,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:08,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484794612] [2024-06-27 21:09:08,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484794612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:08,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:08,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:08,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705398530] [2024-06-27 21:09:08,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:08,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:08,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:09:08,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 227 transitions, 2199 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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 21:09:08,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:08,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:09:08,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:09,614 INFO L124 PetriNetUnfolderBase]: 2056/3498 cut-off events. [2024-06-27 21:09:09,614 INFO L125 PetriNetUnfolderBase]: For 150642/150653 co-relation queries the response was YES. [2024-06-27 21:09:09,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20980 conditions, 3498 events. 2056/3498 cut-off events. For 150642/150653 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21582 event pairs, 485 based on Foata normal form. 11/3481 useless extension candidates. Maximal degree in co-relation 20887. Up to 3180 conditions per place. [2024-06-27 21:09:09,640 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 208 selfloop transitions, 12 changer transitions 0/242 dead transitions. [2024-06-27 21:09:09,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 242 transitions, 2703 flow [2024-06-27 21:09:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:09:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:09:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:09:09,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:09:09,641 INFO L175 Difference]: Start difference. First operand has 203 places, 227 transitions, 2199 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:09:09,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 242 transitions, 2703 flow [2024-06-27 21:09:09,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 242 transitions, 2653 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:09,874 INFO L231 Difference]: Finished difference. Result has 204 places, 229 transitions, 2212 flow [2024-06-27 21:09:09,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2212, PETRI_PLACES=204, PETRI_TRANSITIONS=229} [2024-06-27 21:09:09,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 21:09:09,875 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 229 transitions, 2212 flow [2024-06-27 21:09:09,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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 21:09:09,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:09,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:09,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:09:09,875 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:09,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1805860640, now seen corresponding path program 1 times [2024-06-27 21:09:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:09,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491558555] [2024-06-27 21:09:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:12,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:12,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491558555] [2024-06-27 21:09:12,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491558555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:12,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:12,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:12,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166537048] [2024-06-27 21:09:12,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:12,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:12,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 229 transitions, 2212 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:12,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:12,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:12,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:14,085 INFO L124 PetriNetUnfolderBase]: 2223/3718 cut-off events. [2024-06-27 21:09:14,086 INFO L125 PetriNetUnfolderBase]: For 152089/152091 co-relation queries the response was YES. [2024-06-27 21:09:14,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22055 conditions, 3718 events. 2223/3718 cut-off events. For 152089/152091 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22462 event pairs, 515 based on Foata normal form. 2/3718 useless extension candidates. Maximal degree in co-relation 21961. Up to 3413 conditions per place. [2024-06-27 21:09:14,115 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 40 changer transitions 0/261 dead transitions. [2024-06-27 21:09:14,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 261 transitions, 2974 flow [2024-06-27 21:09:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:09:14,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:09:14,117 INFO L175 Difference]: Start difference. First operand has 204 places, 229 transitions, 2212 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:09:14,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 261 transitions, 2974 flow [2024-06-27 21:09:14,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 261 transitions, 2927 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:14,333 INFO L231 Difference]: Finished difference. Result has 208 places, 235 transitions, 2337 flow [2024-06-27 21:09:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2337, PETRI_PLACES=208, PETRI_TRANSITIONS=235} [2024-06-27 21:09:14,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 21:09:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 235 transitions, 2337 flow [2024-06-27 21:09:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:14,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:14,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:09:14,334 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:14,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:14,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1802135990, now seen corresponding path program 2 times [2024-06-27 21:09:14,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:14,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453981757] [2024-06-27 21:09:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453981757] [2024-06-27 21:09:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453981757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:16,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:16,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227355856] [2024-06-27 21:09:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:16,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:16,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:16,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:16,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 235 transitions, 2337 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:16,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:16,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:18,638 INFO L124 PetriNetUnfolderBase]: 2249/3756 cut-off events. [2024-06-27 21:09:18,638 INFO L125 PetriNetUnfolderBase]: For 161995/161997 co-relation queries the response was YES. [2024-06-27 21:09:18,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22854 conditions, 3756 events. 2249/3756 cut-off events. For 161995/161997 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22746 event pairs, 517 based on Foata normal form. 2/3756 useless extension candidates. Maximal degree in co-relation 22759. Up to 3478 conditions per place. [2024-06-27 21:09:18,676 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 35 changer transitions 0/266 dead transitions. [2024-06-27 21:09:18,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 266 transitions, 3117 flow [2024-06-27 21:09:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:09:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:09:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 21:09:18,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-27 21:09:18,677 INFO L175 Difference]: Start difference. First operand has 208 places, 235 transitions, 2337 flow. Second operand 10 states and 157 transitions. [2024-06-27 21:09:18,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 266 transitions, 3117 flow [2024-06-27 21:09:18,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 266 transitions, 3033 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:18,924 INFO L231 Difference]: Finished difference. Result has 214 places, 241 transitions, 2427 flow [2024-06-27 21:09:18,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2427, PETRI_PLACES=214, PETRI_TRANSITIONS=241} [2024-06-27 21:09:18,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 21:09:18,925 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 241 transitions, 2427 flow [2024-06-27 21:09:18,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:18,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:18,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:09:18,925 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1545837228, now seen corresponding path program 3 times [2024-06-27 21:09:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:18,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50996444] [2024-06-27 21:09:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:21,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50996444] [2024-06-27 21:09:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50996444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:21,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:21,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995155462] [2024-06-27 21:09:21,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:21,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:21,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:21,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:21,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 241 transitions, 2427 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:21,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:21,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:22,758 INFO L124 PetriNetUnfolderBase]: 2243/3748 cut-off events. [2024-06-27 21:09:22,758 INFO L125 PetriNetUnfolderBase]: For 164709/164711 co-relation queries the response was YES. [2024-06-27 21:09:22,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22838 conditions, 3748 events. 2243/3748 cut-off events. For 164709/164711 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22663 event pairs, 516 based on Foata normal form. 2/3748 useless extension candidates. Maximal degree in co-relation 22741. Up to 3473 conditions per place. [2024-06-27 21:09:22,795 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 34 changer transitions 0/263 dead transitions. [2024-06-27 21:09:22,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 263 transitions, 2999 flow [2024-06-27 21:09:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:09:22,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:09:22,797 INFO L175 Difference]: Start difference. First operand has 214 places, 241 transitions, 2427 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:09:22,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 263 transitions, 2999 flow [2024-06-27 21:09:23,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 263 transitions, 2907 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:23,066 INFO L231 Difference]: Finished difference. Result has 216 places, 241 transitions, 2409 flow [2024-06-27 21:09:23,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2409, PETRI_PLACES=216, PETRI_TRANSITIONS=241} [2024-06-27 21:09:23,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 21:09:23,067 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 241 transitions, 2409 flow [2024-06-27 21:09:23,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:23,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:23,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:09:23,068 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:23,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash -689871252, now seen corresponding path program 4 times [2024-06-27 21:09:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435730358] [2024-06-27 21:09:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:25,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435730358] [2024-06-27 21:09:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435730358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:25,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138908705] [2024-06-27 21:09:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:25,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:25,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 241 transitions, 2409 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:25,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:25,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:25,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:27,151 INFO L124 PetriNetUnfolderBase]: 2269/3790 cut-off events. [2024-06-27 21:09:27,151 INFO L125 PetriNetUnfolderBase]: For 173176/173178 co-relation queries the response was YES. [2024-06-27 21:09:27,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23306 conditions, 3790 events. 2269/3790 cut-off events. For 173176/173178 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22974 event pairs, 516 based on Foata normal form. 2/3790 useless extension candidates. Maximal degree in co-relation 23207. Up to 3467 conditions per place. [2024-06-27 21:09:27,185 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 50 changer transitions 0/277 dead transitions. [2024-06-27 21:09:27,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 277 transitions, 3337 flow [2024-06-27 21:09:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:09:27,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:09:27,187 INFO L175 Difference]: Start difference. First operand has 216 places, 241 transitions, 2409 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:09:27,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 277 transitions, 3337 flow [2024-06-27 21:09:27,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 277 transitions, 3269 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:27,465 INFO L231 Difference]: Finished difference. Result has 218 places, 247 transitions, 2543 flow [2024-06-27 21:09:27,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2543, PETRI_PLACES=218, PETRI_TRANSITIONS=247} [2024-06-27 21:09:27,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 21:09:27,465 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 247 transitions, 2543 flow [2024-06-27 21:09:27,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:27,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:27,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:27,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:09:27,466 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash 950860658, now seen corresponding path program 5 times [2024-06-27 21:09:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659733338] [2024-06-27 21:09:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659733338] [2024-06-27 21:09:29,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659733338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:29,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:29,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389980554] [2024-06-27 21:09:29,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:29,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:29,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 247 transitions, 2543 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:29,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:29,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:29,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:31,552 INFO L124 PetriNetUnfolderBase]: 2263/3783 cut-off events. [2024-06-27 21:09:31,552 INFO L125 PetriNetUnfolderBase]: For 176473/176477 co-relation queries the response was YES. [2024-06-27 21:09:31,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23329 conditions, 3783 events. 2263/3783 cut-off events. For 176473/176477 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22995 event pairs, 521 based on Foata normal form. 4/3785 useless extension candidates. Maximal degree in co-relation 23229. Up to 3462 conditions per place. [2024-06-27 21:09:31,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 49 changer transitions 0/270 dead transitions. [2024-06-27 21:09:31,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 270 transitions, 3241 flow [2024-06-27 21:09:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:09:31,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:09:31,591 INFO L175 Difference]: Start difference. First operand has 218 places, 247 transitions, 2543 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:09:31,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 270 transitions, 3241 flow [2024-06-27 21:09:31,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 270 transitions, 3085 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:31,852 INFO L231 Difference]: Finished difference. Result has 220 places, 247 transitions, 2493 flow [2024-06-27 21:09:31,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2493, PETRI_PLACES=220, PETRI_TRANSITIONS=247} [2024-06-27 21:09:31,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 21:09:31,853 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 247 transitions, 2493 flow [2024-06-27 21:09:31,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:31,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:31,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:09:31,853 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:31,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash -689876832, now seen corresponding path program 6 times [2024-06-27 21:09:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:31,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453470657] [2024-06-27 21:09:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:34,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:34,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453470657] [2024-06-27 21:09:34,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453470657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:34,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:34,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:34,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868549069] [2024-06-27 21:09:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:34,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:34,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:34,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:34,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 247 transitions, 2493 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:34,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:34,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:34,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:35,698 INFO L124 PetriNetUnfolderBase]: 2257/3774 cut-off events. [2024-06-27 21:09:35,698 INFO L125 PetriNetUnfolderBase]: For 172591/172593 co-relation queries the response was YES. [2024-06-27 21:09:35,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23063 conditions, 3774 events. 2257/3774 cut-off events. For 172591/172593 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22855 event pairs, 515 based on Foata normal form. 2/3774 useless extension candidates. Maximal degree in co-relation 22963. Up to 3457 conditions per place. [2024-06-27 21:09:35,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 48 changer transitions 0/271 dead transitions. [2024-06-27 21:09:35,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 271 transitions, 3089 flow [2024-06-27 21:09:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:09:35,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:09:35,736 INFO L175 Difference]: Start difference. First operand has 220 places, 247 transitions, 2493 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:09:35,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 271 transitions, 3089 flow [2024-06-27 21:09:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 271 transitions, 2941 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 21:09:36,021 INFO L231 Difference]: Finished difference. Result has 219 places, 247 transitions, 2451 flow [2024-06-27 21:09:36,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2451, PETRI_PLACES=219, PETRI_TRANSITIONS=247} [2024-06-27 21:09:36,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 21:09:36,022 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 247 transitions, 2451 flow [2024-06-27 21:09:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:36,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:36,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:36,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:09:36,023 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:36,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1657875550, now seen corresponding path program 1 times [2024-06-27 21:09:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348802318] [2024-06-27 21:09:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348802318] [2024-06-27 21:09:38,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348802318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:38,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:38,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767664126] [2024-06-27 21:09:38,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:38,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:38,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:38,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 247 transitions, 2451 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:38,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:38,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:38,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:40,667 INFO L124 PetriNetUnfolderBase]: 2270/3796 cut-off events. [2024-06-27 21:09:40,667 INFO L125 PetriNetUnfolderBase]: For 178341/178347 co-relation queries the response was YES. [2024-06-27 21:09:40,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23324 conditions, 3796 events. 2270/3796 cut-off events. For 178341/178347 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23032 event pairs, 521 based on Foata normal form. 7/3800 useless extension candidates. Maximal degree in co-relation 23223. Up to 3401 conditions per place. [2024-06-27 21:09:40,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 57 changer transitions 0/288 dead transitions. [2024-06-27 21:09:40,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 288 transitions, 3497 flow [2024-06-27 21:09:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:09:40,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:09:40,704 INFO L175 Difference]: Start difference. First operand has 219 places, 247 transitions, 2451 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:09:40,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 288 transitions, 3497 flow [2024-06-27 21:09:40,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3391 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:40,976 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2637 flow [2024-06-27 21:09:40,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2637, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-27 21:09:40,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 21:09:40,977 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2637 flow [2024-06-27 21:09:40,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:40,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:40,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:40,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:09:40,977 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:40,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1188975584, now seen corresponding path program 1 times [2024-06-27 21:09:40,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:40,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27843034] [2024-06-27 21:09:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:40,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:43,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:43,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27843034] [2024-06-27 21:09:43,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27843034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:43,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:43,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:43,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105145155] [2024-06-27 21:09:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:43,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:43,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:43,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:43,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:43,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:43,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2637 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:43,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:43,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:43,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:45,510 INFO L124 PetriNetUnfolderBase]: 2317/3862 cut-off events. [2024-06-27 21:09:45,510 INFO L125 PetriNetUnfolderBase]: For 188908/188916 co-relation queries the response was YES. [2024-06-27 21:09:45,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24349 conditions, 3862 events. 2317/3862 cut-off events. For 188908/188916 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23408 event pairs, 516 based on Foata normal form. 10/3870 useless extension candidates. Maximal degree in co-relation 24248. Up to 3485 conditions per place. [2024-06-27 21:09:45,550 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 55 changer transitions 0/307 dead transitions. [2024-06-27 21:09:45,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 307 transitions, 3774 flow [2024-06-27 21:09:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:09:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:09:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:09:45,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-27 21:09:45,551 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2637 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:09:45,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 307 transitions, 3774 flow [2024-06-27 21:09:45,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 307 transitions, 3667 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:45,972 INFO L231 Difference]: Finished difference. Result has 228 places, 274 transitions, 2895 flow [2024-06-27 21:09:45,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2895, PETRI_PLACES=228, PETRI_TRANSITIONS=274} [2024-06-27 21:09:45,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 21:09:45,973 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 274 transitions, 2895 flow [2024-06-27 21:09:45,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:45,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:45,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:45,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:09:45,973 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:45,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1188975398, now seen corresponding path program 2 times [2024-06-27 21:09:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:45,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600794727] [2024-06-27 21:09:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:48,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600794727] [2024-06-27 21:09:48,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600794727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:48,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:48,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582021470] [2024-06-27 21:09:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:48,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:48,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:48,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 274 transitions, 2895 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:48,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:48,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:48,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:50,544 INFO L124 PetriNetUnfolderBase]: 2322/3871 cut-off events. [2024-06-27 21:09:50,545 INFO L125 PetriNetUnfolderBase]: For 194896/194904 co-relation queries the response was YES. [2024-06-27 21:09:50,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24862 conditions, 3871 events. 2322/3871 cut-off events. For 194896/194904 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23457 event pairs, 516 based on Foata normal form. 9/3878 useless extension candidates. Maximal degree in co-relation 24758. Up to 3543 conditions per place. [2024-06-27 21:09:50,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 42 changer transitions 0/303 dead transitions. [2024-06-27 21:09:50,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 303 transitions, 3613 flow [2024-06-27 21:09:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:09:50,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:09:50,579 INFO L175 Difference]: Start difference. First operand has 228 places, 274 transitions, 2895 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:09:50,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 303 transitions, 3613 flow [2024-06-27 21:09:50,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 303 transitions, 3476 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:50,864 INFO L231 Difference]: Finished difference. Result has 232 places, 277 transitions, 2898 flow [2024-06-27 21:09:50,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2898, PETRI_PLACES=232, PETRI_TRANSITIONS=277} [2024-06-27 21:09:50,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-27 21:09:50,865 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 277 transitions, 2898 flow [2024-06-27 21:09:50,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:50,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:50,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:50,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:09:50,866 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:50,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1193617214, now seen corresponding path program 2 times [2024-06-27 21:09:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:50,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126506639] [2024-06-27 21:09:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:53,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:53,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126506639] [2024-06-27 21:09:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126506639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:53,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375944012] [2024-06-27 21:09:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:53,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:53,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:53,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:53,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:53,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 277 transitions, 2898 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:53,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:53,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:53,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:55,409 INFO L124 PetriNetUnfolderBase]: 2374/3945 cut-off events. [2024-06-27 21:09:55,409 INFO L125 PetriNetUnfolderBase]: For 208891/208899 co-relation queries the response was YES. [2024-06-27 21:09:55,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25551 conditions, 3945 events. 2374/3945 cut-off events. For 208891/208899 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23893 event pairs, 518 based on Foata normal form. 10/3953 useless extension candidates. Maximal degree in co-relation 25445. Up to 3540 conditions per place. [2024-06-27 21:09:55,448 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-27 21:09:55,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 325 transitions, 4167 flow [2024-06-27 21:09:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:09:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:09:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 21:09:55,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-27 21:09:55,450 INFO L175 Difference]: Start difference. First operand has 232 places, 277 transitions, 2898 flow. Second operand 11 states and 177 transitions. [2024-06-27 21:09:55,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 325 transitions, 4167 flow [2024-06-27 21:09:55,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 325 transitions, 4041 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:55,780 INFO L231 Difference]: Finished difference. Result has 237 places, 293 transitions, 3111 flow [2024-06-27 21:09:55,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3111, PETRI_PLACES=237, PETRI_TRANSITIONS=293} [2024-06-27 21:09:55,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 21:09:55,780 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 293 transitions, 3111 flow [2024-06-27 21:09:55,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:55,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:55,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:55,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:09:55,781 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:55,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1366106918, now seen corresponding path program 3 times [2024-06-27 21:09:55,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:55,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582488780] [2024-06-27 21:09:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:55,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582488780] [2024-06-27 21:09:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582488780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:59,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:59,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:59,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553678625] [2024-06-27 21:09:59,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:59,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:59,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:59,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:59,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 293 transitions, 3111 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:59,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:59,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:59,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:00,708 INFO L124 PetriNetUnfolderBase]: 2387/3969 cut-off events. [2024-06-27 21:10:00,708 INFO L125 PetriNetUnfolderBase]: For 215718/215726 co-relation queries the response was YES. [2024-06-27 21:10:00,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25949 conditions, 3969 events. 2387/3969 cut-off events. For 215718/215726 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24093 event pairs, 523 based on Foata normal form. 9/3976 useless extension candidates. Maximal degree in co-relation 25842. Up to 3624 conditions per place. [2024-06-27 21:10:00,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 54 changer transitions 0/323 dead transitions. [2024-06-27 21:10:00,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 323 transitions, 4037 flow [2024-06-27 21:10:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:10:00,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 21:10:00,745 INFO L175 Difference]: Start difference. First operand has 237 places, 293 transitions, 3111 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:10:00,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 323 transitions, 4037 flow [2024-06-27 21:10:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 323 transitions, 3935 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:10:01,078 INFO L231 Difference]: Finished difference. Result has 244 places, 299 transitions, 3245 flow [2024-06-27 21:10:01,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3245, PETRI_PLACES=244, PETRI_TRANSITIONS=299} [2024-06-27 21:10:01,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 21:10:01,079 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 299 transitions, 3245 flow [2024-06-27 21:10:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:01,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:01,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:10:01,079 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:01,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1366344254, now seen corresponding path program 3 times [2024-06-27 21:10:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:01,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853767714] [2024-06-27 21:10:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853767714] [2024-06-27 21:10:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853767714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:04,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:04,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850093583] [2024-06-27 21:10:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:04,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:04,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:04,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 299 transitions, 3245 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:04,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:04,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:04,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:06,165 INFO L124 PetriNetUnfolderBase]: 2381/3957 cut-off events. [2024-06-27 21:10:06,165 INFO L125 PetriNetUnfolderBase]: For 220696/220704 co-relation queries the response was YES. [2024-06-27 21:10:06,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25844 conditions, 3957 events. 2381/3957 cut-off events. For 220696/220704 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23993 event pairs, 516 based on Foata normal form. 10/3965 useless extension candidates. Maximal degree in co-relation 25735. Up to 3553 conditions per place. [2024-06-27 21:10:06,206 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 67 changer transitions 0/327 dead transitions. [2024-06-27 21:10:06,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 327 transitions, 4207 flow [2024-06-27 21:10:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:10:06,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 21:10:06,208 INFO L175 Difference]: Start difference. First operand has 244 places, 299 transitions, 3245 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:10:06,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 327 transitions, 4207 flow [2024-06-27 21:10:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 327 transitions, 4037 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:06,580 INFO L231 Difference]: Finished difference. Result has 247 places, 299 transitions, 3216 flow [2024-06-27 21:10:06,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3216, PETRI_PLACES=247, PETRI_TRANSITIONS=299} [2024-06-27 21:10:06,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 21:10:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 299 transitions, 3216 flow [2024-06-27 21:10:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:06,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:06,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:06,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:10:06,581 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1366353182, now seen corresponding path program 1 times [2024-06-27 21:10:06,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764745019] [2024-06-27 21:10:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:10,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:10,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764745019] [2024-06-27 21:10:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764745019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:10,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:10,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:10,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450001142] [2024-06-27 21:10:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:10,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:10,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:10,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:10,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 299 transitions, 3216 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:10,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:10,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:10,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:11,767 INFO L124 PetriNetUnfolderBase]: 2270/3821 cut-off events. [2024-06-27 21:10:11,767 INFO L125 PetriNetUnfolderBase]: For 245313/245324 co-relation queries the response was YES. [2024-06-27 21:10:11,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25342 conditions, 3821 events. 2270/3821 cut-off events. For 245313/245324 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23589 event pairs, 484 based on Foata normal form. 21/3812 useless extension candidates. Maximal degree in co-relation 25232. Up to 3285 conditions per place. [2024-06-27 21:10:11,808 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 236 selfloop transitions, 54 changer transitions 0/328 dead transitions. [2024-06-27 21:10:11,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 328 transitions, 3908 flow [2024-06-27 21:10:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:10:11,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 21:10:11,810 INFO L175 Difference]: Start difference. First operand has 247 places, 299 transitions, 3216 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:10:11,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 328 transitions, 3908 flow [2024-06-27 21:10:12,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 328 transitions, 3774 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:12,336 INFO L231 Difference]: Finished difference. Result has 248 places, 300 transitions, 3219 flow [2024-06-27 21:10:12,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=248, PETRI_TRANSITIONS=300} [2024-06-27 21:10:12,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-27 21:10:12,337 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 300 transitions, 3219 flow [2024-06-27 21:10:12,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:12,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:12,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:12,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:10:12,337 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:12,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2086075136, now seen corresponding path program 4 times [2024-06-27 21:10:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:12,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533813968] [2024-06-27 21:10:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533813968] [2024-06-27 21:10:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533813968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:15,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:15,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382268420] [2024-06-27 21:10:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:15,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:15,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 300 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:15,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:15,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:16,788 INFO L124 PetriNetUnfolderBase]: 2438/4048 cut-off events. [2024-06-27 21:10:16,789 INFO L125 PetriNetUnfolderBase]: For 236352/236371 co-relation queries the response was YES. [2024-06-27 21:10:16,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26719 conditions, 4048 events. 2438/4048 cut-off events. For 236352/236371 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24595 event pairs, 537 based on Foata normal form. 15/4059 useless extension candidates. Maximal degree in co-relation 26608. Up to 3625 conditions per place. [2024-06-27 21:10:16,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 84 changer transitions 0/335 dead transitions. [2024-06-27 21:10:16,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 335 transitions, 4329 flow [2024-06-27 21:10:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:10:16,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:10:16,826 INFO L175 Difference]: Start difference. First operand has 248 places, 300 transitions, 3219 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:10:16,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 335 transitions, 4329 flow [2024-06-27 21:10:17,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 335 transitions, 4224 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:17,127 INFO L231 Difference]: Finished difference. Result has 249 places, 306 transitions, 3404 flow [2024-06-27 21:10:17,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3404, PETRI_PLACES=249, PETRI_TRANSITIONS=306} [2024-06-27 21:10:17,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 21:10:17,127 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 306 transitions, 3404 flow [2024-06-27 21:10:17,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:17,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:17,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:17,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:10:17,128 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:17,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1030945682, now seen corresponding path program 5 times [2024-06-27 21:10:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:17,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258903967] [2024-06-27 21:10:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:20,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:20,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258903967] [2024-06-27 21:10:20,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258903967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:20,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:20,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:20,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307778091] [2024-06-27 21:10:20,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:20,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:20,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:20,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:20,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 306 transitions, 3404 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:20,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:20,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:20,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:22,132 INFO L124 PetriNetUnfolderBase]: 2443/4053 cut-off events. [2024-06-27 21:10:22,132 INFO L125 PetriNetUnfolderBase]: For 242774/242793 co-relation queries the response was YES. [2024-06-27 21:10:22,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26905 conditions, 4053 events. 2443/4053 cut-off events. For 242774/242793 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24619 event pairs, 531 based on Foata normal form. 15/4064 useless extension candidates. Maximal degree in co-relation 26793. Up to 3631 conditions per place. [2024-06-27 21:10:22,170 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 83 changer transitions 0/339 dead transitions. [2024-06-27 21:10:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 339 transitions, 4602 flow [2024-06-27 21:10:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:10:22,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:10:22,171 INFO L175 Difference]: Start difference. First operand has 249 places, 306 transitions, 3404 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:10:22,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 339 transitions, 4602 flow [2024-06-27 21:10:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 339 transitions, 4412 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:22,517 INFO L231 Difference]: Finished difference. Result has 253 places, 309 transitions, 3450 flow [2024-06-27 21:10:22,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3450, PETRI_PLACES=253, PETRI_TRANSITIONS=309} [2024-06-27 21:10:22,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 21:10:22,517 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 309 transitions, 3450 flow [2024-06-27 21:10:22,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:22,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:22,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:22,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:10:22,518 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:22,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1030825526, now seen corresponding path program 4 times [2024-06-27 21:10:22,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:22,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086445543] [2024-06-27 21:10:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:25,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:25,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086445543] [2024-06-27 21:10:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086445543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:25,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:25,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193499890] [2024-06-27 21:10:25,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:25,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:25,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:25,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 309 transitions, 3450 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:25,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:25,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:25,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:27,111 INFO L124 PetriNetUnfolderBase]: 2437/4049 cut-off events. [2024-06-27 21:10:27,111 INFO L125 PetriNetUnfolderBase]: For 247597/247616 co-relation queries the response was YES. [2024-06-27 21:10:27,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26797 conditions, 4049 events. 2437/4049 cut-off events. For 247597/247616 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24604 event pairs, 538 based on Foata normal form. 16/4061 useless extension candidates. Maximal degree in co-relation 26684. Up to 3696 conditions per place. [2024-06-27 21:10:27,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 52 changer transitions 0/338 dead transitions. [2024-06-27 21:10:27,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 338 transitions, 4352 flow [2024-06-27 21:10:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:10:27,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:10:27,147 INFO L175 Difference]: Start difference. First operand has 253 places, 309 transitions, 3450 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:10:27,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 338 transitions, 4352 flow [2024-06-27 21:10:27,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 338 transitions, 4042 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:27,498 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 3288 flow [2024-06-27 21:10:27,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3288, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-27 21:10:27,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 21:10:27,499 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 3288 flow [2024-06-27 21:10:27,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:27,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:27,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:27,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:10:27,499 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:27,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1030825712, now seen corresponding path program 6 times [2024-06-27 21:10:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:27,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886327333] [2024-06-27 21:10:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:30,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886327333] [2024-06-27 21:10:30,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886327333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:30,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:30,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649317596] [2024-06-27 21:10:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:30,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:30,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:30,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 3288 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:30,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:30,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:30,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:31,951 INFO L124 PetriNetUnfolderBase]: 2434/4041 cut-off events. [2024-06-27 21:10:31,951 INFO L125 PetriNetUnfolderBase]: For 249164/249183 co-relation queries the response was YES. [2024-06-27 21:10:31,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26612 conditions, 4041 events. 2434/4041 cut-off events. For 249164/249183 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24542 event pairs, 530 based on Foata normal form. 15/4052 useless extension candidates. Maximal degree in co-relation 26497. Up to 3704 conditions per place. [2024-06-27 21:10:31,992 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 49 changer transitions 0/334 dead transitions. [2024-06-27 21:10:31,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 334 transitions, 4016 flow [2024-06-27 21:10:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:10:31,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:10:31,997 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 3288 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:10:31,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 334 transitions, 4016 flow [2024-06-27 21:10:32,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 334 transitions, 3890 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:32,402 INFO L231 Difference]: Finished difference. Result has 259 places, 311 transitions, 3266 flow [2024-06-27 21:10:32,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3266, PETRI_PLACES=259, PETRI_TRANSITIONS=311} [2024-06-27 21:10:32,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 21:10:32,403 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 311 transitions, 3266 flow [2024-06-27 21:10:32,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:32,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:32,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:32,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:10:32,404 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:32,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash -147116702, now seen corresponding path program 7 times [2024-06-27 21:10:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:32,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117910088] [2024-06-27 21:10:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117910088] [2024-06-27 21:10:34,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117910088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:34,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:34,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249007816] [2024-06-27 21:10:34,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:35,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:35,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 3266 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:35,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:35,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:35,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:36,736 INFO L124 PetriNetUnfolderBase]: 2439/4048 cut-off events. [2024-06-27 21:10:36,736 INFO L125 PetriNetUnfolderBase]: For 256264/256283 co-relation queries the response was YES. [2024-06-27 21:10:36,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26731 conditions, 4048 events. 2439/4048 cut-off events. For 256264/256283 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24602 event pairs, 528 based on Foata normal form. 15/4059 useless extension candidates. Maximal degree in co-relation 26615. Up to 3626 conditions per place. [2024-06-27 21:10:36,780 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 90 changer transitions 0/338 dead transitions. [2024-06-27 21:10:36,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 338 transitions, 4180 flow [2024-06-27 21:10:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:10:36,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:10:36,781 INFO L175 Difference]: Start difference. First operand has 259 places, 311 transitions, 3266 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:10:36,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 338 transitions, 4180 flow [2024-06-27 21:10:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 338 transitions, 4078 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:37,169 INFO L231 Difference]: Finished difference. Result has 260 places, 314 transitions, 3394 flow [2024-06-27 21:10:37,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3394, PETRI_PLACES=260, PETRI_TRANSITIONS=314} [2024-06-27 21:10:37,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 21:10:37,169 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 314 transitions, 3394 flow [2024-06-27 21:10:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:37,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:37,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:37,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:10:37,170 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:37,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash -31646786, now seen corresponding path program 5 times [2024-06-27 21:10:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:37,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052207109] [2024-06-27 21:10:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052207109] [2024-06-27 21:10:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052207109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:39,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:39,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030504984] [2024-06-27 21:10:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:39,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:39,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 314 transitions, 3394 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:39,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:39,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:39,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:41,513 INFO L124 PetriNetUnfolderBase]: 2470/4095 cut-off events. [2024-06-27 21:10:41,513 INFO L125 PetriNetUnfolderBase]: For 270893/270912 co-relation queries the response was YES. [2024-06-27 21:10:41,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27420 conditions, 4095 events. 2470/4095 cut-off events. For 270893/270912 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24863 event pairs, 526 based on Foata normal form. 16/4107 useless extension candidates. Maximal degree in co-relation 27303. Up to 3616 conditions per place. [2024-06-27 21:10:41,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 88 changer transitions 0/354 dead transitions. [2024-06-27 21:10:41,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 354 transitions, 4658 flow [2024-06-27 21:10:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:10:41,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 21:10:41,556 INFO L175 Difference]: Start difference. First operand has 260 places, 314 transitions, 3394 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:10:41,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 354 transitions, 4658 flow [2024-06-27 21:10:41,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 354 transitions, 4488 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:41,996 INFO L231 Difference]: Finished difference. Result has 265 places, 329 transitions, 3687 flow [2024-06-27 21:10:41,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=265, PETRI_TRANSITIONS=329} [2024-06-27 21:10:41,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 21:10:41,997 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 329 transitions, 3687 flow [2024-06-27 21:10:41,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:41,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:41,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:10:41,997 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:41,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash -676325522, now seen corresponding path program 8 times [2024-06-27 21:10:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:41,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354745173] [2024-06-27 21:10:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:41,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:44,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:44,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354745173] [2024-06-27 21:10:44,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354745173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:44,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:44,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373343898] [2024-06-27 21:10:44,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:44,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:44,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:44,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 329 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:44,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:44,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:44,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:46,467 INFO L124 PetriNetUnfolderBase]: 2483/4115 cut-off events. [2024-06-27 21:10:46,467 INFO L125 PetriNetUnfolderBase]: For 280057/280076 co-relation queries the response was YES. [2024-06-27 21:10:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28085 conditions, 4115 events. 2483/4115 cut-off events. For 280057/280076 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24989 event pairs, 535 based on Foata normal form. 15/4126 useless extension candidates. Maximal degree in co-relation 27965. Up to 3758 conditions per place. [2024-06-27 21:10:46,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 63 changer transitions 0/355 dead transitions. [2024-06-27 21:10:46,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 355 transitions, 4683 flow [2024-06-27 21:10:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:10:46,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:10:46,507 INFO L175 Difference]: Start difference. First operand has 265 places, 329 transitions, 3687 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:10:46,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 355 transitions, 4683 flow [2024-06-27 21:10:46,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 355 transitions, 4587 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-27 21:10:46,974 INFO L231 Difference]: Finished difference. Result has 272 places, 335 transitions, 3851 flow [2024-06-27 21:10:46,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3591, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3851, PETRI_PLACES=272, PETRI_TRANSITIONS=335} [2024-06-27 21:10:46,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 21:10:46,975 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 335 transitions, 3851 flow [2024-06-27 21:10:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:46,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:46,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:10:46,975 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:46,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -32062496, now seen corresponding path program 6 times [2024-06-27 21:10:46,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:46,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128292866] [2024-06-27 21:10:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:46,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:49,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:49,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128292866] [2024-06-27 21:10:49,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128292866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:49,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:49,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:49,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146531026] [2024-06-27 21:10:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:49,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:49,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:49,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 335 transitions, 3851 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:49,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:49,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:49,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:51,327 INFO L124 PetriNetUnfolderBase]: 2477/4103 cut-off events. [2024-06-27 21:10:51,327 INFO L125 PetriNetUnfolderBase]: For 284269/284288 co-relation queries the response was YES. [2024-06-27 21:10:51,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27884 conditions, 4103 events. 2477/4103 cut-off events. For 284269/284288 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24934 event pairs, 530 based on Foata normal form. 16/4115 useless extension candidates. Maximal degree in co-relation 27761. Up to 3760 conditions per place. [2024-06-27 21:10:51,373 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 52 changer transitions 0/355 dead transitions. [2024-06-27 21:10:51,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 355 transitions, 4611 flow [2024-06-27 21:10:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:10:51,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 21:10:51,374 INFO L175 Difference]: Start difference. First operand has 272 places, 335 transitions, 3851 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:10:51,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 355 transitions, 4611 flow [2024-06-27 21:10:51,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 355 transitions, 4449 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:51,985 INFO L231 Difference]: Finished difference. Result has 275 places, 335 transitions, 3799 flow [2024-06-27 21:10:51,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3799, PETRI_PLACES=275, PETRI_TRANSITIONS=335} [2024-06-27 21:10:51,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 21:10:51,986 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 335 transitions, 3799 flow [2024-06-27 21:10:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:51,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:51,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:51,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:10:51,987 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:51,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -676562672, now seen corresponding path program 9 times [2024-06-27 21:10:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:51,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75027898] [2024-06-27 21:10:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:54,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:54,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75027898] [2024-06-27 21:10:54,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75027898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:54,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:54,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079606309] [2024-06-27 21:10:54,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:54,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:54,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:54,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 335 transitions, 3799 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:54,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:54,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:56,859 INFO L124 PetriNetUnfolderBase]: 2474/4103 cut-off events. [2024-06-27 21:10:56,859 INFO L125 PetriNetUnfolderBase]: For 286441/286460 co-relation queries the response was YES. [2024-06-27 21:10:56,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27808 conditions, 4103 events. 2474/4103 cut-off events. For 286441/286460 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25017 event pairs, 534 based on Foata normal form. 15/4114 useless extension candidates. Maximal degree in co-relation 27685. Up to 3747 conditions per place. [2024-06-27 21:10:56,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 64 changer transitions 0/356 dead transitions. [2024-06-27 21:10:56,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 356 transitions, 4563 flow [2024-06-27 21:10:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:10:56,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-27 21:10:56,907 INFO L175 Difference]: Start difference. First operand has 275 places, 335 transitions, 3799 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:10:56,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 356 transitions, 4563 flow [2024-06-27 21:10:57,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 356 transitions, 4411 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:57,403 INFO L231 Difference]: Finished difference. Result has 278 places, 335 transitions, 3781 flow [2024-06-27 21:10:57,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3781, PETRI_PLACES=278, PETRI_TRANSITIONS=335} [2024-06-27 21:10:57,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 21:10:57,404 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 335 transitions, 3781 flow [2024-06-27 21:10:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:57,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:57,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:57,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:10:57,405 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:57,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash -88488356, now seen corresponding path program 7 times [2024-06-27 21:10:57,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:57,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845460095] [2024-06-27 21:10:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:57,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:00,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845460095] [2024-06-27 21:11:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845460095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:00,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:00,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:00,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476508113] [2024-06-27 21:11:00,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:00,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:00,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 335 transitions, 3781 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:00,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:00,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:00,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:01,544 INFO L124 PetriNetUnfolderBase]: 2484/4112 cut-off events. [2024-06-27 21:11:01,544 INFO L125 PetriNetUnfolderBase]: For 296620/296628 co-relation queries the response was YES. [2024-06-27 21:11:01,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27990 conditions, 4112 events. 2484/4112 cut-off events. For 296620/296628 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24946 event pairs, 526 based on Foata normal form. 10/4120 useless extension candidates. Maximal degree in co-relation 27866. Up to 3696 conditions per place. [2024-06-27 21:11:01,589 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 281 selfloop transitions, 76 changer transitions 0/362 dead transitions. [2024-06-27 21:11:01,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 362 transitions, 4750 flow [2024-06-27 21:11:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:11:01,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:11:01,590 INFO L175 Difference]: Start difference. First operand has 278 places, 335 transitions, 3781 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:11:01,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 362 transitions, 4750 flow [2024-06-27 21:11:02,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 362 transitions, 4596 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 21:11:02,119 INFO L231 Difference]: Finished difference. Result has 275 places, 338 transitions, 3833 flow [2024-06-27 21:11:02,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3833, PETRI_PLACES=275, PETRI_TRANSITIONS=338} [2024-06-27 21:11:02,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 21:11:02,119 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 338 transitions, 3833 flow [2024-06-27 21:11:02,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:02,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:02,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:02,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:11:02,120 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:02,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash -88725506, now seen corresponding path program 8 times [2024-06-27 21:11:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:02,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190433593] [2024-06-27 21:11:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:04,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190433593] [2024-06-27 21:11:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190433593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:04,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:04,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:04,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466934669] [2024-06-27 21:11:04,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:04,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:04,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:04,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:04,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 338 transitions, 3833 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:04,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:04,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:04,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:06,447 INFO L124 PetriNetUnfolderBase]: 2478/4104 cut-off events. [2024-06-27 21:11:06,447 INFO L125 PetriNetUnfolderBase]: For 299391/299399 co-relation queries the response was YES. [2024-06-27 21:11:06,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27977 conditions, 4104 events. 2478/4104 cut-off events. For 299391/299399 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24918 event pairs, 525 based on Foata normal form. 10/4112 useless extension candidates. Maximal degree in co-relation 27853. Up to 3691 conditions per place. [2024-06-27 21:11:06,492 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 283 selfloop transitions, 81 changer transitions 0/369 dead transitions. [2024-06-27 21:11:06,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 369 transitions, 4793 flow [2024-06-27 21:11:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:11:06,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:11:06,493 INFO L175 Difference]: Start difference. First operand has 275 places, 338 transitions, 3833 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:11:06,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 369 transitions, 4793 flow [2024-06-27 21:11:07,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 369 transitions, 4633 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:07,117 INFO L231 Difference]: Finished difference. Result has 279 places, 338 transitions, 3851 flow [2024-06-27 21:11:07,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3851, PETRI_PLACES=279, PETRI_TRANSITIONS=338} [2024-06-27 21:11:07,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 21:11:07,118 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 338 transitions, 3851 flow [2024-06-27 21:11:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:07,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:07,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:07,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:11:07,119 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:07,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash -88725692, now seen corresponding path program 10 times [2024-06-27 21:11:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:07,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436492255] [2024-06-27 21:11:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:07,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:10,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436492255] [2024-06-27 21:11:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436492255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:10,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:10,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904246468] [2024-06-27 21:11:10,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:10,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:10,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:10,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:10,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 338 transitions, 3851 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:10,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:10,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:10,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:12,342 INFO L124 PetriNetUnfolderBase]: 2475/4104 cut-off events. [2024-06-27 21:11:12,342 INFO L125 PetriNetUnfolderBase]: For 294132/294140 co-relation queries the response was YES. [2024-06-27 21:11:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27864 conditions, 4104 events. 2475/4104 cut-off events. For 294132/294140 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24991 event pairs, 531 based on Foata normal form. 9/4111 useless extension candidates. Maximal degree in co-relation 27740. Up to 3688 conditions per place. [2024-06-27 21:11:12,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 90 changer transitions 0/378 dead transitions. [2024-06-27 21:11:12,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 378 transitions, 4859 flow [2024-06-27 21:11:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:11:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:11:12,389 INFO L175 Difference]: Start difference. First operand has 279 places, 338 transitions, 3851 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:11:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 378 transitions, 4859 flow [2024-06-27 21:11:13,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 378 transitions, 4631 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 21:11:13,040 INFO L231 Difference]: Finished difference. Result has 278 places, 338 transitions, 3825 flow [2024-06-27 21:11:13,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3825, PETRI_PLACES=278, PETRI_TRANSITIONS=338} [2024-06-27 21:11:13,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 21:11:13,041 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 338 transitions, 3825 flow [2024-06-27 21:11:13,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:13,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:13,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:13,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:11:13,041 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:13,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 316722874, now seen corresponding path program 9 times [2024-06-27 21:11:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:13,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781411604] [2024-06-27 21:11:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781411604] [2024-06-27 21:11:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781411604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819428159] [2024-06-27 21:11:15,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:15,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:15,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:15,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:15,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 338 transitions, 3825 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:15,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:15,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:15,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:17,458 INFO L124 PetriNetUnfolderBase]: 2501/4142 cut-off events. [2024-06-27 21:11:17,458 INFO L125 PetriNetUnfolderBase]: For 295726/295759 co-relation queries the response was YES. [2024-06-27 21:11:17,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28175 conditions, 4142 events. 2501/4142 cut-off events. For 295726/295759 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25229 event pairs, 540 based on Foata normal form. 24/4162 useless extension candidates. Maximal degree in co-relation 28052. Up to 3651 conditions per place. [2024-06-27 21:11:17,500 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 95 changer transitions 0/363 dead transitions. [2024-06-27 21:11:17,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 363 transitions, 4991 flow [2024-06-27 21:11:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:11:17,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:11:17,501 INFO L175 Difference]: Start difference. First operand has 278 places, 338 transitions, 3825 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:11:17,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 363 transitions, 4991 flow [2024-06-27 21:11:17,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 363 transitions, 4767 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:11:17,977 INFO L231 Difference]: Finished difference. Result has 276 places, 344 transitions, 3921 flow [2024-06-27 21:11:17,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3921, PETRI_PLACES=276, PETRI_TRANSITIONS=344} [2024-06-27 21:11:17,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 21:11:17,977 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 344 transitions, 3921 flow [2024-06-27 21:11:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:17,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:17,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:17,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:11:17,978 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:17,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash 311008954, now seen corresponding path program 10 times [2024-06-27 21:11:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:17,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398716026] [2024-06-27 21:11:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398716026] [2024-06-27 21:11:20,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398716026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:20,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:20,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:20,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141821089] [2024-06-27 21:11:20,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:20,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:20,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:21,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:21,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 344 transitions, 3921 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:21,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:21,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:21,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:22,631 INFO L124 PetriNetUnfolderBase]: 2495/4134 cut-off events. [2024-06-27 21:11:22,631 INFO L125 PetriNetUnfolderBase]: For 275855/275888 co-relation queries the response was YES. [2024-06-27 21:11:22,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27783 conditions, 4134 events. 2495/4134 cut-off events. For 275855/275888 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25228 event pairs, 539 based on Foata normal form. 24/4154 useless extension candidates. Maximal degree in co-relation 27660. Up to 3646 conditions per place. [2024-06-27 21:11:22,673 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 94 changer transitions 0/363 dead transitions. [2024-06-27 21:11:22,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 363 transitions, 4967 flow [2024-06-27 21:11:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:11:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:11:22,674 INFO L175 Difference]: Start difference. First operand has 276 places, 344 transitions, 3921 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:11:22,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 363 transitions, 4967 flow [2024-06-27 21:11:23,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 363 transitions, 4760 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 21:11:23,157 INFO L231 Difference]: Finished difference. Result has 280 places, 344 transitions, 3908 flow [2024-06-27 21:11:23,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3908, PETRI_PLACES=280, PETRI_TRANSITIONS=344} [2024-06-27 21:11:23,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 21:11:23,157 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 344 transitions, 3908 flow [2024-06-27 21:11:23,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:23,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:23,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:23,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:11:23,158 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:23,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash 88821724, now seen corresponding path program 11 times [2024-06-27 21:11:23,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:23,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659551594] [2024-06-27 21:11:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:23,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:25,754 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 21:11:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659551594] [2024-06-27 21:11:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659551594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:25,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:25,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:25,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331483087] [2024-06-27 21:11:25,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:25,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:25,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:25,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 344 transitions, 3908 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:25,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:25,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:27,405 INFO L124 PetriNetUnfolderBase]: 2489/4123 cut-off events. [2024-06-27 21:11:27,405 INFO L125 PetriNetUnfolderBase]: For 276727/276746 co-relation queries the response was YES. [2024-06-27 21:11:27,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27565 conditions, 4123 events. 2489/4123 cut-off events. For 276727/276746 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25066 event pairs, 522 based on Foata normal form. 16/4135 useless extension candidates. Maximal degree in co-relation 27441. Up to 3641 conditions per place. [2024-06-27 21:11:27,442 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 99 changer transitions 0/367 dead transitions. [2024-06-27 21:11:27,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 367 transitions, 4838 flow [2024-06-27 21:11:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:11:27,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:11:27,444 INFO L175 Difference]: Start difference. First operand has 280 places, 344 transitions, 3908 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:11:27,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 367 transitions, 4838 flow [2024-06-27 21:11:28,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 367 transitions, 4547 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:28,033 INFO L231 Difference]: Finished difference. Result has 281 places, 344 transitions, 3825 flow [2024-06-27 21:11:28,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3825, PETRI_PLACES=281, PETRI_TRANSITIONS=344} [2024-06-27 21:11:28,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 21:11:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 344 transitions, 3825 flow [2024-06-27 21:11:28,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:28,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:28,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:11:28,034 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 945496420, now seen corresponding path program 11 times [2024-06-27 21:11:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:28,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685448254] [2024-06-27 21:11:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:28,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685448254] [2024-06-27 21:11:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685448254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:30,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:30,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:30,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855167777] [2024-06-27 21:11:30,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:30,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:30,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 344 transitions, 3825 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:30,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:30,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:32,758 INFO L124 PetriNetUnfolderBase]: 2486/4121 cut-off events. [2024-06-27 21:11:32,759 INFO L125 PetriNetUnfolderBase]: For 278937/278956 co-relation queries the response was YES. [2024-06-27 21:11:32,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27342 conditions, 4121 events. 2486/4121 cut-off events. For 278937/278956 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25091 event pairs, 536 based on Foata normal form. 15/4132 useless extension candidates. Maximal degree in co-relation 27218. Up to 3705 conditions per place. [2024-06-27 21:11:32,803 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 90 changer transitions 0/381 dead transitions. [2024-06-27 21:11:32,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 381 transitions, 4829 flow [2024-06-27 21:11:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:11:32,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:11:32,805 INFO L175 Difference]: Start difference. First operand has 281 places, 344 transitions, 3825 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:11:32,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 381 transitions, 4829 flow [2024-06-27 21:11:33,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 381 transitions, 4603 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:33,347 INFO L231 Difference]: Finished difference. Result has 284 places, 344 transitions, 3799 flow [2024-06-27 21:11:33,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3799, PETRI_PLACES=284, PETRI_TRANSITIONS=344} [2024-06-27 21:11:33,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 21:11:33,348 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 344 transitions, 3799 flow [2024-06-27 21:11:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:33,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:33,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:11:33,348 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:33,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash -594531474, now seen corresponding path program 12 times [2024-06-27 21:11:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994638440] [2024-06-27 21:11:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:35,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:35,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994638440] [2024-06-27 21:11:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994638440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:35,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:35,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108697749] [2024-06-27 21:11:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:35,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:35,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:35,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:35,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 344 transitions, 3799 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:35,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:35,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:35,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:37,528 INFO L124 PetriNetUnfolderBase]: 2483/4117 cut-off events. [2024-06-27 21:11:37,529 INFO L125 PetriNetUnfolderBase]: For 275912/275931 co-relation queries the response was YES. [2024-06-27 21:11:37,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27180 conditions, 4117 events. 2483/4117 cut-off events. For 275912/275931 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25055 event pairs, 536 based on Foata normal form. 15/4128 useless extension candidates. Maximal degree in co-relation 27056. Up to 3702 conditions per place. [2024-06-27 21:11:37,580 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 87 changer transitions 0/370 dead transitions. [2024-06-27 21:11:37,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 370 transitions, 4609 flow [2024-06-27 21:11:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:11:37,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:11:37,581 INFO L175 Difference]: Start difference. First operand has 284 places, 344 transitions, 3799 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:11:37,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 370 transitions, 4609 flow [2024-06-27 21:11:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 370 transitions, 4353 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-27 21:11:38,120 INFO L231 Difference]: Finished difference. Result has 279 places, 344 transitions, 3731 flow [2024-06-27 21:11:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3731, PETRI_PLACES=279, PETRI_TRANSITIONS=344} [2024-06-27 21:11:38,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 21:11:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 344 transitions, 3731 flow [2024-06-27 21:11:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:11:38,122 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash 88406014, now seen corresponding path program 12 times [2024-06-27 21:11:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225568050] [2024-06-27 21:11:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:40,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:40,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225568050] [2024-06-27 21:11:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225568050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491257658] [2024-06-27 21:11:40,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:40,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:40,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:40,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:40,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 344 transitions, 3731 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:40,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:40,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:42,347 INFO L124 PetriNetUnfolderBase]: 2477/4105 cut-off events. [2024-06-27 21:11:42,347 INFO L125 PetriNetUnfolderBase]: For 259399/259418 co-relation queries the response was YES. [2024-06-27 21:11:42,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26728 conditions, 4105 events. 2477/4105 cut-off events. For 259399/259418 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24982 event pairs, 533 based on Foata normal form. 16/4117 useless extension candidates. Maximal degree in co-relation 26606. Up to 3750 conditions per place. [2024-06-27 21:11:42,391 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 57 changer transitions 0/367 dead transitions. [2024-06-27 21:11:42,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 367 transitions, 4525 flow [2024-06-27 21:11:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:11:42,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:11:42,392 INFO L175 Difference]: Start difference. First operand has 279 places, 344 transitions, 3731 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:11:42,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 367 transitions, 4525 flow [2024-06-27 21:11:42,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 367 transitions, 4321 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:42,902 INFO L231 Difference]: Finished difference. Result has 279 places, 344 transitions, 3655 flow [2024-06-27 21:11:42,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3655, PETRI_PLACES=279, PETRI_TRANSITIONS=344} [2024-06-27 21:11:42,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 21:11:42,903 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 344 transitions, 3655 flow [2024-06-27 21:11:42,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:42,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:42,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:42,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:11:42,904 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 21:11:42,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash -88479428, now seen corresponding path program 2 times [2024-06-27 21:11:42,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:42,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097405197] [2024-06-27 21:11:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:42,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097405197] [2024-06-27 21:11:46,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097405197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:46,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:46,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:46,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386640907] [2024-06-27 21:11:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:46,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:46,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:46,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:11:46,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 344 transitions, 3655 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:46,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:46,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:11:46,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:47,956 INFO L124 PetriNetUnfolderBase]: 2367/3969 cut-off events. [2024-06-27 21:11:47,956 INFO L125 PetriNetUnfolderBase]: For 274678/274689 co-relation queries the response was YES. [2024-06-27 21:11:47,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25932 conditions, 3969 events. 2367/3969 cut-off events. For 274678/274689 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24545 event pairs, 493 based on Foata normal form. 21/3962 useless extension candidates. Maximal degree in co-relation 25810. Up to 3359 conditions per place. [2024-06-27 21:11:48,000 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 263 selfloop transitions, 53 changer transitions 0/370 dead transitions. [2024-06-27 21:11:48,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 370 transitions, 4395 flow [2024-06-27 21:11:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:11:48,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:11:48,001 INFO L175 Difference]: Start difference. First operand has 279 places, 344 transitions, 3655 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:11:48,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 370 transitions, 4395 flow [2024-06-27 21:11:48,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 370 transitions, 4269 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:11:48,416 INFO L231 Difference]: Finished difference. Result has 278 places, 345 transitions, 3670 flow [2024-06-27 21:11:48,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3670, PETRI_PLACES=278, PETRI_TRANSITIONS=345} [2024-06-27 21:11:48,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 21:11:48,416 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 345 transitions, 3670 flow [2024-06-27 21:11:48,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:48,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:48,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:48,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:11:48,417 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 21:11:48,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash 324827452, now seen corresponding path program 3 times [2024-06-27 21:11:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:48,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406477757] [2024-06-27 21:11:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:48,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:52,187 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 21:11:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406477757] [2024-06-27 21:11:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406477757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:52,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74855353] [2024-06-27 21:11:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:52,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:11:52,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 345 transitions, 3670 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:52,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:52,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:11:52,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:53,620 INFO L124 PetriNetUnfolderBase]: 2403/4018 cut-off events. [2024-06-27 21:11:53,620 INFO L125 PetriNetUnfolderBase]: For 269567/269591 co-relation queries the response was YES. [2024-06-27 21:11:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26241 conditions, 4018 events. 2403/4018 cut-off events. For 269567/269591 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24917 event pairs, 501 based on Foata normal form. 30/4002 useless extension candidates. Maximal degree in co-relation 26120. Up to 3462 conditions per place. [2024-06-27 21:11:53,663 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 253 selfloop transitions, 58 changer transitions 0/365 dead transitions. [2024-06-27 21:11:53,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 365 transitions, 4384 flow [2024-06-27 21:11:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:11:53,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:11:53,665 INFO L175 Difference]: Start difference. First operand has 278 places, 345 transitions, 3670 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:11:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 365 transitions, 4384 flow [2024-06-27 21:11:54,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 365 transitions, 4279 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:54,089 INFO L231 Difference]: Finished difference. Result has 280 places, 346 transitions, 3709 flow [2024-06-27 21:11:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3709, PETRI_PLACES=280, PETRI_TRANSITIONS=346} [2024-06-27 21:11:54,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 21:11:54,089 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 346 transitions, 3709 flow [2024-06-27 21:11:54,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:54,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:54,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:54,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:11:54,090 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 21:11:54,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 325302682, now seen corresponding path program 4 times [2024-06-27 21:11:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:54,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895690203] [2024-06-27 21:11:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895690203] [2024-06-27 21:11:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895690203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:58,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:58,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283094411] [2024-06-27 21:11:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:58,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:11:58,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 346 transitions, 3709 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:58,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:58,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:11:58,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:59,759 INFO L124 PetriNetUnfolderBase]: 2406/4028 cut-off events. [2024-06-27 21:11:59,759 INFO L125 PetriNetUnfolderBase]: For 250915/250939 co-relation queries the response was YES. [2024-06-27 21:11:59,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25972 conditions, 4028 events. 2406/4028 cut-off events. For 250915/250939 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24962 event pairs, 497 based on Foata normal form. 26/4011 useless extension candidates. Maximal degree in co-relation 25850. Up to 3331 conditions per place. [2024-06-27 21:11:59,797 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 62 changer transitions 0/368 dead transitions. [2024-06-27 21:11:59,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 368 transitions, 4447 flow [2024-06-27 21:11:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:11:59,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 21:11:59,798 INFO L175 Difference]: Start difference. First operand has 280 places, 346 transitions, 3709 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:11:59,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 368 transitions, 4447 flow [2024-06-27 21:12:00,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 368 transitions, 4327 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:00,176 INFO L231 Difference]: Finished difference. Result has 282 places, 347 transitions, 3739 flow [2024-06-27 21:12:00,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3739, PETRI_PLACES=282, PETRI_TRANSITIONS=347} [2024-06-27 21:12:00,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 21:12:00,177 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 347 transitions, 3739 flow [2024-06-27 21:12:00,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:00,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:00,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:00,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:12:00,177 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 21:12:00,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash -149964734, now seen corresponding path program 1 times [2024-06-27 21:12:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:00,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384383817] [2024-06-27 21:12:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:02,723 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 21:12:02,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384383817] [2024-06-27 21:12:02,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384383817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:02,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:02,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:02,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760960792] [2024-06-27 21:12:02,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:02,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:02,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:02,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 347 transitions, 3739 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:04,295 INFO L124 PetriNetUnfolderBase]: 2575/4259 cut-off events. [2024-06-27 21:12:04,295 INFO L125 PetriNetUnfolderBase]: For 246298/246300 co-relation queries the response was YES. [2024-06-27 21:12:04,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 4259 events. 2575/4259 cut-off events. For 246298/246300 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26031 event pairs, 524 based on Foata normal form. 2/4259 useless extension candidates. Maximal degree in co-relation 27195. Up to 3942 conditions per place. [2024-06-27 21:12:04,342 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 32 changer transitions 0/379 dead transitions. [2024-06-27 21:12:04,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 379 transitions, 4791 flow [2024-06-27 21:12:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:12:04,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:12:04,343 INFO L175 Difference]: Start difference. First operand has 282 places, 347 transitions, 3739 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:12:04,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 379 transitions, 4791 flow [2024-06-27 21:12:04,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 379 transitions, 4657 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:04,788 INFO L231 Difference]: Finished difference. Result has 285 places, 351 transitions, 3770 flow [2024-06-27 21:12:04,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=285, PETRI_TRANSITIONS=351} [2024-06-27 21:12:04,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 21:12:04,789 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 351 transitions, 3770 flow [2024-06-27 21:12:04,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:04,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:04,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:04,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:12:04,789 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 21:12:04,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -147107774, now seen corresponding path program 2 times [2024-06-27 21:12:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:04,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897755396] [2024-06-27 21:12:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:04,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:07,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:07,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897755396] [2024-06-27 21:12:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897755396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:07,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368642096] [2024-06-27 21:12:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:07,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:07,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 351 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:07,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:07,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:07,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:08,971 INFO L124 PetriNetUnfolderBase]: 2583/4275 cut-off events. [2024-06-27 21:12:08,971 INFO L125 PetriNetUnfolderBase]: For 252258/252260 co-relation queries the response was YES. [2024-06-27 21:12:09,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27353 conditions, 4275 events. 2583/4275 cut-off events. For 252258/252260 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26154 event pairs, 564 based on Foata normal form. 2/4275 useless extension candidates. Maximal degree in co-relation 27229. Up to 3991 conditions per place. [2024-06-27 21:12:09,018 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 29 changer transitions 0/375 dead transitions. [2024-06-27 21:12:09,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 375 transitions, 4620 flow [2024-06-27 21:12:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:12:09,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:12:09,019 INFO L175 Difference]: Start difference. First operand has 285 places, 351 transitions, 3770 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:12:09,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 375 transitions, 4620 flow [2024-06-27 21:12:09,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 375 transitions, 4514 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 21:12:09,587 INFO L231 Difference]: Finished difference. Result has 289 places, 353 transitions, 3781 flow [2024-06-27 21:12:09,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3781, PETRI_PLACES=289, PETRI_TRANSITIONS=353} [2024-06-27 21:12:09,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 21:12:09,588 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 353 transitions, 3781 flow [2024-06-27 21:12:09,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:09,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:09,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:09,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:12:09,588 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 21:12:09,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:09,589 INFO L85 PathProgramCache]: Analyzing trace with hash -31816604, now seen corresponding path program 3 times [2024-06-27 21:12:09,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:09,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393462423] [2024-06-27 21:12:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:12,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:12,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393462423] [2024-06-27 21:12:12,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393462423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:12,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:12,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:12,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175112727] [2024-06-27 21:12:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:12,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:12,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:12,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:12,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 353 transitions, 3781 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:12,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:12,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:12,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:13,713 INFO L124 PetriNetUnfolderBase]: 2591/4287 cut-off events. [2024-06-27 21:12:13,713 INFO L125 PetriNetUnfolderBase]: For 259284/259286 co-relation queries the response was YES. [2024-06-27 21:12:13,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27466 conditions, 4287 events. 2591/4287 cut-off events. For 259284/259286 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26264 event pairs, 564 based on Foata normal form. 2/4287 useless extension candidates. Maximal degree in co-relation 27340. Up to 4020 conditions per place. [2024-06-27 21:12:13,764 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 21 changer transitions 0/373 dead transitions. [2024-06-27 21:12:13,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 373 transitions, 4603 flow [2024-06-27 21:12:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:12:13,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 21:12:13,766 INFO L175 Difference]: Start difference. First operand has 289 places, 353 transitions, 3781 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:12:13,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 373 transitions, 4603 flow [2024-06-27 21:12:14,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 373 transitions, 4522 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:14,222 INFO L231 Difference]: Finished difference. Result has 291 places, 355 transitions, 3789 flow [2024-06-27 21:12:14,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3789, PETRI_PLACES=291, PETRI_TRANSITIONS=355} [2024-06-27 21:12:14,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 21:12:14,222 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 355 transitions, 3789 flow [2024-06-27 21:12:14,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:14,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:14,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:12:14,223 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 21:12:14,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:14,223 INFO L85 PathProgramCache]: Analyzing trace with hash -676131896, now seen corresponding path program 1 times [2024-06-27 21:12:14,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:14,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495217973] [2024-06-27 21:12:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:17,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:17,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495217973] [2024-06-27 21:12:17,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495217973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:17,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:17,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634954560] [2024-06-27 21:12:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:17,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:17,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 355 transitions, 3789 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:17,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:17,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:17,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:19,277 INFO L124 PetriNetUnfolderBase]: 2599/4295 cut-off events. [2024-06-27 21:12:19,277 INFO L125 PetriNetUnfolderBase]: For 266315/266317 co-relation queries the response was YES. [2024-06-27 21:12:19,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27608 conditions, 4295 events. 2599/4295 cut-off events. For 266315/266317 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26217 event pairs, 542 based on Foata normal form. 2/4295 useless extension candidates. Maximal degree in co-relation 27481. Up to 4009 conditions per place. [2024-06-27 21:12:19,323 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 345 selfloop transitions, 28 changer transitions 0/378 dead transitions. [2024-06-27 21:12:19,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 378 transitions, 4633 flow [2024-06-27 21:12:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:12:19,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:12:19,324 INFO L175 Difference]: Start difference. First operand has 291 places, 355 transitions, 3789 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:12:19,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 378 transitions, 4633 flow [2024-06-27 21:12:19,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 378 transitions, 4564 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:19,866 INFO L231 Difference]: Finished difference. Result has 293 places, 357 transitions, 3829 flow [2024-06-27 21:12:19,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3829, PETRI_PLACES=293, PETRI_TRANSITIONS=357} [2024-06-27 21:12:19,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 21:12:19,866 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 357 transitions, 3829 flow [2024-06-27 21:12:19,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:19,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:19,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:19,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:12:19,867 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 21:12:19,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash 88651906, now seen corresponding path program 4 times [2024-06-27 21:12:19,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:19,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603633148] [2024-06-27 21:12:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603633148] [2024-06-27 21:12:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603633148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:22,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:22,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246029425] [2024-06-27 21:12:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:22,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:22,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:22,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 357 transitions, 3829 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:22,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:22,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:22,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:23,962 INFO L124 PetriNetUnfolderBase]: 2594/4292 cut-off events. [2024-06-27 21:12:23,962 INFO L125 PetriNetUnfolderBase]: For 268356/268358 co-relation queries the response was YES. [2024-06-27 21:12:23,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27576 conditions, 4292 events. 2594/4292 cut-off events. For 268356/268358 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26279 event pairs, 525 based on Foata normal form. 2/4292 useless extension candidates. Maximal degree in co-relation 27448. Up to 3983 conditions per place. [2024-06-27 21:12:24,011 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 30 changer transitions 0/382 dead transitions. [2024-06-27 21:12:24,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 382 transitions, 4653 flow [2024-06-27 21:12:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:12:24,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:12:24,013 INFO L175 Difference]: Start difference. First operand has 293 places, 357 transitions, 3829 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:12:24,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 382 transitions, 4653 flow [2024-06-27 21:12:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 382 transitions, 4536 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:24,468 INFO L231 Difference]: Finished difference. Result has 294 places, 357 transitions, 3783 flow [2024-06-27 21:12:24,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3783, PETRI_PLACES=294, PETRI_TRANSITIONS=357} [2024-06-27 21:12:24,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 21:12:24,469 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 357 transitions, 3783 flow [2024-06-27 21:12:24,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:24,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:24,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:24,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:12:24,469 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:24,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:24,470 INFO L85 PathProgramCache]: Analyzing trace with hash 88836604, now seen corresponding path program 2 times [2024-06-27 21:12:24,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:24,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700451937] [2024-06-27 21:12:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:24,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:27,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:27,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700451937] [2024-06-27 21:12:27,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700451937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:27,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:27,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:27,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641950998] [2024-06-27 21:12:27,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:27,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:27,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:27,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:27,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:27,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 357 transitions, 3783 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:27,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:27,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:29,348 INFO L124 PetriNetUnfolderBase]: 2602/4300 cut-off events. [2024-06-27 21:12:29,348 INFO L125 PetriNetUnfolderBase]: For 275167/275169 co-relation queries the response was YES. [2024-06-27 21:12:29,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27696 conditions, 4300 events. 2602/4300 cut-off events. For 275167/275169 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26296 event pairs, 541 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 27567. Up to 4008 conditions per place. [2024-06-27 21:12:29,398 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 344 selfloop transitions, 30 changer transitions 0/379 dead transitions. [2024-06-27 21:12:29,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 379 transitions, 4631 flow [2024-06-27 21:12:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:12:29,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:12:29,400 INFO L175 Difference]: Start difference. First operand has 294 places, 357 transitions, 3783 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:12:29,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 379 transitions, 4631 flow [2024-06-27 21:12:29,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 379 transitions, 4562 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:29,861 INFO L231 Difference]: Finished difference. Result has 295 places, 359 transitions, 3834 flow [2024-06-27 21:12:29,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3834, PETRI_PLACES=295, PETRI_TRANSITIONS=359} [2024-06-27 21:12:29,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-27 21:12:29,862 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 359 transitions, 3834 flow [2024-06-27 21:12:29,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:29,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:29,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:29,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:12:29,862 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:29,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 325011964, now seen corresponding path program 3 times [2024-06-27 21:12:29,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:29,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300651959] [2024-06-27 21:12:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:29,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300651959] [2024-06-27 21:12:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300651959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117007162] [2024-06-27 21:12:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:33,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:33,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 359 transitions, 3834 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:33,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:33,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:33,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:34,689 INFO L124 PetriNetUnfolderBase]: 2610/4317 cut-off events. [2024-06-27 21:12:34,689 INFO L125 PetriNetUnfolderBase]: For 276714/276718 co-relation queries the response was YES. [2024-06-27 21:12:34,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27908 conditions, 4317 events. 2610/4317 cut-off events. For 276714/276718 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26450 event pairs, 548 based on Foata normal form. 4/4319 useless extension candidates. Maximal degree in co-relation 27778. Up to 4026 conditions per place. [2024-06-27 21:12:34,739 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 344 selfloop transitions, 27 changer transitions 0/376 dead transitions. [2024-06-27 21:12:34,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 376 transitions, 4666 flow [2024-06-27 21:12:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:12:34,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:12:34,740 INFO L175 Difference]: Start difference. First operand has 295 places, 359 transitions, 3834 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:12:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 376 transitions, 4666 flow [2024-06-27 21:12:35,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 376 transitions, 4562 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:35,292 INFO L231 Difference]: Finished difference. Result has 297 places, 361 transitions, 3845 flow [2024-06-27 21:12:35,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3845, PETRI_PLACES=297, PETRI_TRANSITIONS=361} [2024-06-27 21:12:35,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 21:12:35,293 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 361 transitions, 3845 flow [2024-06-27 21:12:35,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:35,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:35,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:35,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:12:35,293 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:35,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash 325308634, now seen corresponding path program 4 times [2024-06-27 21:12:35,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:35,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959317406] [2024-06-27 21:12:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:35,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:38,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959317406] [2024-06-27 21:12:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959317406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:38,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:38,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149701180] [2024-06-27 21:12:38,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:38,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:38,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:38,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 361 transitions, 3845 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:38,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:38,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:38,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:39,942 INFO L124 PetriNetUnfolderBase]: 2605/4310 cut-off events. [2024-06-27 21:12:39,942 INFO L125 PetriNetUnfolderBase]: For 270845/270849 co-relation queries the response was YES. [2024-06-27 21:12:39,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27611 conditions, 4310 events. 2605/4310 cut-off events. For 270845/270849 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26399 event pairs, 539 based on Foata normal form. 4/4312 useless extension candidates. Maximal degree in co-relation 27480. Up to 3993 conditions per place. [2024-06-27 21:12:39,989 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 339 selfloop transitions, 34 changer transitions 0/378 dead transitions. [2024-06-27 21:12:39,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 378 transitions, 4681 flow [2024-06-27 21:12:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:12:39,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:12:39,990 INFO L175 Difference]: Start difference. First operand has 297 places, 361 transitions, 3845 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:12:39,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 378 transitions, 4681 flow [2024-06-27 21:12:40,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 378 transitions, 4586 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:40,553 INFO L231 Difference]: Finished difference. Result has 299 places, 363 transitions, 3879 flow [2024-06-27 21:12:40,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3879, PETRI_PLACES=299, PETRI_TRANSITIONS=363} [2024-06-27 21:12:40,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 21:12:40,554 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 363 transitions, 3879 flow [2024-06-27 21:12:40,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:40,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:40,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:40,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:12:40,555 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:40,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash 481278529, now seen corresponding path program 1 times [2024-06-27 21:12:40,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:40,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106001116] [2024-06-27 21:12:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:40,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:44,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106001116] [2024-06-27 21:12:44,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106001116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:44,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:44,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:44,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588123381] [2024-06-27 21:12:44,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:44,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:44,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:44,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 363 transitions, 3879 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:44,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:44,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:44,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:45,988 INFO L124 PetriNetUnfolderBase]: 2681/4439 cut-off events. [2024-06-27 21:12:45,988 INFO L125 PetriNetUnfolderBase]: For 294894/294900 co-relation queries the response was YES. [2024-06-27 21:12:46,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28378 conditions, 4439 events. 2681/4439 cut-off events. For 294894/294900 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27220 event pairs, 457 based on Foata normal form. 14/4451 useless extension candidates. Maximal degree in co-relation 28246. Up to 3790 conditions per place. [2024-06-27 21:12:46,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 344 selfloop transitions, 68 changer transitions 0/417 dead transitions. [2024-06-27 21:12:46,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 417 transitions, 5082 flow [2024-06-27 21:12:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:12:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:12:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:12:46,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 21:12:46,042 INFO L175 Difference]: Start difference. First operand has 299 places, 363 transitions, 3879 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:12:46,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 417 transitions, 5082 flow [2024-06-27 21:12:46,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 417 transitions, 4969 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:46,621 INFO L231 Difference]: Finished difference. Result has 307 places, 368 transitions, 3999 flow [2024-06-27 21:12:46,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3999, PETRI_PLACES=307, PETRI_TRANSITIONS=368} [2024-06-27 21:12:46,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 21:12:46,622 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 368 transitions, 3999 flow [2024-06-27 21:12:46,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:46,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:46,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:46,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:12:46,622 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:46,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1166034055, now seen corresponding path program 2 times [2024-06-27 21:12:46,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:46,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412081774] [2024-06-27 21:12:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:46,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412081774] [2024-06-27 21:12:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412081774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:50,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:50,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:50,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442134204] [2024-06-27 21:12:50,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:50,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:50,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:50,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 368 transitions, 3999 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:50,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:50,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:52,261 INFO L124 PetriNetUnfolderBase]: 2783/4605 cut-off events. [2024-06-27 21:12:52,261 INFO L125 PetriNetUnfolderBase]: For 304107/304113 co-relation queries the response was YES. [2024-06-27 21:12:52,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29662 conditions, 4605 events. 2783/4605 cut-off events. For 304107/304113 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28509 event pairs, 557 based on Foata normal form. 14/4617 useless extension candidates. Maximal degree in co-relation 29527. Up to 4086 conditions per place. [2024-06-27 21:12:52,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 348 selfloop transitions, 76 changer transitions 0/429 dead transitions. [2024-06-27 21:12:52,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 429 transitions, 5214 flow [2024-06-27 21:12:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:12:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:12:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-27 21:12:52,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:12:52,319 INFO L175 Difference]: Start difference. First operand has 307 places, 368 transitions, 3999 flow. Second operand 12 states and 195 transitions. [2024-06-27 21:12:52,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 429 transitions, 5214 flow [2024-06-27 21:12:53,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 429 transitions, 5023 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:53,036 INFO L231 Difference]: Finished difference. Result has 312 places, 384 transitions, 4195 flow [2024-06-27 21:12:53,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4195, PETRI_PLACES=312, PETRI_TRANSITIONS=384} [2024-06-27 21:12:53,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 21:12:53,036 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 384 transitions, 4195 flow [2024-06-27 21:12:53,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:53,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:53,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:53,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:12:53,037 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 21:12:53,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1322191877, now seen corresponding path program 1 times [2024-06-27 21:12:53,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:53,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949115284] [2024-06-27 21:12:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:53,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:56,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:56,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949115284] [2024-06-27 21:12:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949115284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:56,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:56,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:56,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922890463] [2024-06-27 21:12:56,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:56,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:56,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:56,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:56,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 384 transitions, 4195 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:58,170 INFO L124 PetriNetUnfolderBase]: 2796/4621 cut-off events. [2024-06-27 21:12:58,170 INFO L125 PetriNetUnfolderBase]: For 294591/294597 co-relation queries the response was YES. [2024-06-27 21:12:58,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29794 conditions, 4621 events. 2796/4621 cut-off events. For 294591/294597 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28615 event pairs, 582 based on Foata normal form. 7/4626 useless extension candidates. Maximal degree in co-relation 29659. Up to 4194 conditions per place. [2024-06-27 21:12:58,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 362 selfloop transitions, 62 changer transitions 0/429 dead transitions. [2024-06-27 21:12:58,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 429 transitions, 5429 flow [2024-06-27 21:12:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:12:58,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:12:58,219 INFO L175 Difference]: Start difference. First operand has 312 places, 384 transitions, 4195 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:12:58,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 429 transitions, 5429 flow [2024-06-27 21:12:58,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 429 transitions, 5275 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:12:58,723 INFO L231 Difference]: Finished difference. Result has 314 places, 390 transitions, 4297 flow [2024-06-27 21:12:58,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4297, PETRI_PLACES=314, PETRI_TRANSITIONS=390} [2024-06-27 21:12:58,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 21:12:58,724 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 390 transitions, 4297 flow [2024-06-27 21:12:58,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:58,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:58,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:58,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:12:58,724 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 21:12:58,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2113426399, now seen corresponding path program 1 times [2024-06-27 21:12:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818497691] [2024-06-27 21:12:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:58,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:02,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:02,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818497691] [2024-06-27 21:13:02,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818497691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:02,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:02,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:02,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586820118] [2024-06-27 21:13:02,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:02,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:02,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:02,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:02,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 390 transitions, 4297 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:02,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:02,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:02,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:04,232 INFO L124 PetriNetUnfolderBase]: 2842/4677 cut-off events. [2024-06-27 21:13:04,233 INFO L125 PetriNetUnfolderBase]: For 313405/313411 co-relation queries the response was YES. [2024-06-27 21:13:04,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30763 conditions, 4677 events. 2842/4677 cut-off events. For 313405/313411 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28819 event pairs, 567 based on Foata normal form. 8/4683 useless extension candidates. Maximal degree in co-relation 30627. Up to 4165 conditions per place. [2024-06-27 21:13:04,288 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 97 changer transitions 0/445 dead transitions. [2024-06-27 21:13:04,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 445 transitions, 5644 flow [2024-06-27 21:13:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:13:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:13:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:13:04,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-27 21:13:04,290 INFO L175 Difference]: Start difference. First operand has 314 places, 390 transitions, 4297 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:13:04,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 445 transitions, 5644 flow [2024-06-27 21:13:05,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 445 transitions, 5491 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:05,008 INFO L231 Difference]: Finished difference. Result has 321 places, 404 transitions, 4560 flow [2024-06-27 21:13:05,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4560, PETRI_PLACES=321, PETRI_TRANSITIONS=404} [2024-06-27 21:13:05,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-27 21:13:05,009 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 404 transitions, 4560 flow [2024-06-27 21:13:05,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:05,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:05,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:05,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:13:05,009 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 21:13:05,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1084785535, now seen corresponding path program 2 times [2024-06-27 21:13:05,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:05,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103137134] [2024-06-27 21:13:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:05,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103137134] [2024-06-27 21:13:08,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103137134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:08,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:08,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:08,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369753868] [2024-06-27 21:13:08,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:08,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:08,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:08,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:08,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:08,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 404 transitions, 4560 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:08,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:08,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:08,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:10,489 INFO L124 PetriNetUnfolderBase]: 2847/4698 cut-off events. [2024-06-27 21:13:10,490 INFO L125 PetriNetUnfolderBase]: For 320661/320667 co-relation queries the response was YES. [2024-06-27 21:13:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31465 conditions, 4698 events. 2847/4698 cut-off events. For 320661/320667 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29110 event pairs, 586 based on Foata normal form. 7/4703 useless extension candidates. Maximal degree in co-relation 31326. Up to 4284 conditions per place. [2024-06-27 21:13:10,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 62 changer transitions 0/441 dead transitions. [2024-06-27 21:13:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 441 transitions, 5574 flow [2024-06-27 21:13:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:13:10,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:13:10,552 INFO L175 Difference]: Start difference. First operand has 321 places, 404 transitions, 4560 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:13:10,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 441 transitions, 5574 flow [2024-06-27 21:13:11,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 441 transitions, 5411 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:11,302 INFO L231 Difference]: Finished difference. Result has 324 places, 407 transitions, 4576 flow [2024-06-27 21:13:11,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4576, PETRI_PLACES=324, PETRI_TRANSITIONS=407} [2024-06-27 21:13:11,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 21:13:11,303 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 407 transitions, 4576 flow [2024-06-27 21:13:11,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:11,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:11,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:11,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:13:11,303 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 21:13:11,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1939613081, now seen corresponding path program 3 times [2024-06-27 21:13:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:11,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099717068] [2024-06-27 21:13:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:14,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:14,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099717068] [2024-06-27 21:13:14,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099717068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:14,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:14,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050195343] [2024-06-27 21:13:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:14,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:14,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:14,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:14,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:14,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 407 transitions, 4576 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:17,421 INFO L124 PetriNetUnfolderBase]: 2862/4717 cut-off events. [2024-06-27 21:13:17,421 INFO L125 PetriNetUnfolderBase]: For 327263/327269 co-relation queries the response was YES. [2024-06-27 21:13:17,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31763 conditions, 4717 events. 2862/4717 cut-off events. For 327263/327269 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29219 event pairs, 583 based on Foata normal form. 7/4722 useless extension candidates. Maximal degree in co-relation 31622. Up to 4298 conditions per place. [2024-06-27 21:13:17,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 71 changer transitions 0/452 dead transitions. [2024-06-27 21:13:17,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 452 transitions, 5699 flow [2024-06-27 21:13:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:13:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:13:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:13:17,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-27 21:13:17,473 INFO L175 Difference]: Start difference. First operand has 324 places, 407 transitions, 4576 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:13:17,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 452 transitions, 5699 flow [2024-06-27 21:13:18,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 452 transitions, 5526 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 21:13:18,295 INFO L231 Difference]: Finished difference. Result has 328 places, 415 transitions, 4681 flow [2024-06-27 21:13:18,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4681, PETRI_PLACES=328, PETRI_TRANSITIONS=415} [2024-06-27 21:13:18,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 21:13:18,296 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 415 transitions, 4681 flow [2024-06-27 21:13:18,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:18,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:18,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:18,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:13:18,297 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 21:13:18,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -907416679, now seen corresponding path program 2 times [2024-06-27 21:13:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970315799] [2024-06-27 21:13:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:18,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:21,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:21,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970315799] [2024-06-27 21:13:21,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970315799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:21,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:21,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365366041] [2024-06-27 21:13:21,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:21,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:21,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:21,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 415 transitions, 4681 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:21,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:21,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:21,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:24,307 INFO L124 PetriNetUnfolderBase]: 2908/4777 cut-off events. [2024-06-27 21:13:24,307 INFO L125 PetriNetUnfolderBase]: For 345074/345080 co-relation queries the response was YES. [2024-06-27 21:13:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32418 conditions, 4777 events. 2908/4777 cut-off events. For 345074/345080 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29563 event pairs, 566 based on Foata normal form. 8/4783 useless extension candidates. Maximal degree in co-relation 32277. Up to 4232 conditions per place. [2024-06-27 21:13:24,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 354 selfloop transitions, 115 changer transitions 0/474 dead transitions. [2024-06-27 21:13:24,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 474 transitions, 6223 flow [2024-06-27 21:13:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:13:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:13:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-06-27 21:13:24,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:13:24,370 INFO L175 Difference]: Start difference. First operand has 328 places, 415 transitions, 4681 flow. Second operand 14 states and 224 transitions. [2024-06-27 21:13:24,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 474 transitions, 6223 flow [2024-06-27 21:13:25,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 474 transitions, 6042 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 21:13:25,242 INFO L231 Difference]: Finished difference. Result has 333 places, 427 transitions, 4899 flow [2024-06-27 21:13:25,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4500, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4899, PETRI_PLACES=333, PETRI_TRANSITIONS=427} [2024-06-27 21:13:25,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 21:13:25,243 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 427 transitions, 4899 flow [2024-06-27 21:13:25,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:25,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:25,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:25,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:13:25,243 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 21:13:25,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -907653829, now seen corresponding path program 3 times [2024-06-27 21:13:25,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:25,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288453450] [2024-06-27 21:13:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:28,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:28,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288453450] [2024-06-27 21:13:28,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288453450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:28,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:28,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:28,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122649290] [2024-06-27 21:13:28,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:28,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:28,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:28,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:28,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:28,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 427 transitions, 4899 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:28,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:28,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:28,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:30,960 INFO L124 PetriNetUnfolderBase]: 2902/4773 cut-off events. [2024-06-27 21:13:30,960 INFO L125 PetriNetUnfolderBase]: For 346682/346688 co-relation queries the response was YES. [2024-06-27 21:13:31,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32436 conditions, 4773 events. 2902/4773 cut-off events. For 346682/346688 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29532 event pairs, 565 based on Foata normal form. 8/4779 useless extension candidates. Maximal degree in co-relation 32294. Up to 4227 conditions per place. [2024-06-27 21:13:31,022 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 114 changer transitions 0/474 dead transitions. [2024-06-27 21:13:31,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 474 transitions, 6125 flow [2024-06-27 21:13:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:13:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:13:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 226 transitions. [2024-06-27 21:13:31,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 21:13:31,024 INFO L175 Difference]: Start difference. First operand has 333 places, 427 transitions, 4899 flow. Second operand 14 states and 226 transitions. [2024-06-27 21:13:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 474 transitions, 6125 flow [2024-06-27 21:13:31,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 474 transitions, 5862 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-27 21:13:31,802 INFO L231 Difference]: Finished difference. Result has 337 places, 427 transitions, 4873 flow [2024-06-27 21:13:31,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4873, PETRI_PLACES=337, PETRI_TRANSITIONS=427} [2024-06-27 21:13:31,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 21:13:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 427 transitions, 4873 flow [2024-06-27 21:13:31,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:31,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:31,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:31,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:13:31,803 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 21:13:31,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash -841459819, now seen corresponding path program 3 times [2024-06-27 21:13:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:31,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981384860] [2024-06-27 21:13:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:31,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:35,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:35,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981384860] [2024-06-27 21:13:35,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981384860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:35,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:35,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:35,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749401975] [2024-06-27 21:13:35,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:35,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:35,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:35,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:35,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 427 transitions, 4873 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:35,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:35,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:35,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:37,396 INFO L124 PetriNetUnfolderBase]: 2938/4830 cut-off events. [2024-06-27 21:13:37,396 INFO L125 PetriNetUnfolderBase]: For 375634/375636 co-relation queries the response was YES. [2024-06-27 21:13:37,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32820 conditions, 4830 events. 2938/4830 cut-off events. For 375634/375636 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29959 event pairs, 571 based on Foata normal form. 8/4836 useless extension candidates. Maximal degree in co-relation 32677. Up to 4316 conditions per place. [2024-06-27 21:13:37,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 73 changer transitions 0/466 dead transitions. [2024-06-27 21:13:37,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 466 transitions, 5974 flow [2024-06-27 21:13:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:13:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:13:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 21:13:37,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-27 21:13:37,463 INFO L175 Difference]: Start difference. First operand has 337 places, 427 transitions, 4873 flow. Second operand 12 states and 190 transitions. [2024-06-27 21:13:37,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 466 transitions, 5974 flow [2024-06-27 21:13:38,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 466 transitions, 5693 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 21:13:38,501 INFO L231 Difference]: Finished difference. Result has 336 places, 430 transitions, 4804 flow [2024-06-27 21:13:38,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4804, PETRI_PLACES=336, PETRI_TRANSITIONS=430} [2024-06-27 21:13:38,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 21:13:38,502 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 430 transitions, 4804 flow [2024-06-27 21:13:38,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:38,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:38,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:38,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:13:38,503 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 21:13:38,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -145762257, now seen corresponding path program 4 times [2024-06-27 21:13:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:38,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603506604] [2024-06-27 21:13:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603506604] [2024-06-27 21:13:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603506604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415601202] [2024-06-27 21:13:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:41,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:41,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 430 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:41,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:41,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:44,269 INFO L124 PetriNetUnfolderBase]: 2959/4857 cut-off events. [2024-06-27 21:13:44,269 INFO L125 PetriNetUnfolderBase]: For 368292/368294 co-relation queries the response was YES. [2024-06-27 21:13:44,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33287 conditions, 4857 events. 2959/4857 cut-off events. For 368292/368294 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 30072 event pairs, 618 based on Foata normal form. 1/4855 useless extension candidates. Maximal degree in co-relation 33142. Up to 4119 conditions per place. [2024-06-27 21:13:44,324 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 159 changer transitions 0/478 dead transitions. [2024-06-27 21:13:44,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 478 transitions, 6618 flow [2024-06-27 21:13:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:13:44,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:13:44,326 INFO L175 Difference]: Start difference. First operand has 336 places, 430 transitions, 4804 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:13:44,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 478 transitions, 6618 flow [2024-06-27 21:13:45,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 478 transitions, 6465 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:45,281 INFO L231 Difference]: Finished difference. Result has 338 places, 442 transitions, 5253 flow [2024-06-27 21:13:45,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5253, PETRI_PLACES=338, PETRI_TRANSITIONS=442} [2024-06-27 21:13:45,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 21:13:45,281 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 442 transitions, 5253 flow [2024-06-27 21:13:45,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:45,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:45,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:45,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:13:45,282 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 21:13:45,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1462156619, now seen corresponding path program 1 times [2024-06-27 21:13:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:45,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890112687] [2024-06-27 21:13:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:48,625 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 21:13:48,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:48,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890112687] [2024-06-27 21:13:48,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890112687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:48,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:48,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068758585] [2024-06-27 21:13:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:48,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:48,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:48,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:48,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 442 transitions, 5253 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:48,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:48,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:48,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:50,880 INFO L124 PetriNetUnfolderBase]: 3001/4912 cut-off events. [2024-06-27 21:13:50,880 INFO L125 PetriNetUnfolderBase]: For 397321/397327 co-relation queries the response was YES. [2024-06-27 21:13:50,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34681 conditions, 4912 events. 3001/4912 cut-off events. For 397321/397327 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30350 event pairs, 609 based on Foata normal form. 8/4917 useless extension candidates. Maximal degree in co-relation 34535. Up to 4314 conditions per place. [2024-06-27 21:13:50,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 134 changer transitions 0/491 dead transitions. [2024-06-27 21:13:50,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 491 transitions, 6839 flow [2024-06-27 21:13:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:13:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:13:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-27 21:13:50,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-27 21:13:50,944 INFO L175 Difference]: Start difference. First operand has 338 places, 442 transitions, 5253 flow. Second operand 12 states and 199 transitions. [2024-06-27 21:13:50,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 491 transitions, 6839 flow [2024-06-27 21:13:51,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 491 transitions, 6650 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:51,833 INFO L231 Difference]: Finished difference. Result has 347 places, 451 transitions, 5512 flow [2024-06-27 21:13:51,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5512, PETRI_PLACES=347, PETRI_TRANSITIONS=451} [2024-06-27 21:13:51,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 21:13:51,834 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 451 transitions, 5512 flow [2024-06-27 21:13:51,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:51,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:51,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:13:51,834 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 21:13:51,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1805846531, now seen corresponding path program 5 times [2024-06-27 21:13:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:51,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739369597] [2024-06-27 21:13:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:51,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:55,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:55,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739369597] [2024-06-27 21:13:55,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739369597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:55,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:55,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858610951] [2024-06-27 21:13:55,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:55,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:55,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:55,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 451 transitions, 5512 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:55,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:55,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:55,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:57,506 INFO L124 PetriNetUnfolderBase]: 3006/4924 cut-off events. [2024-06-27 21:13:57,506 INFO L125 PetriNetUnfolderBase]: For 404730/404732 co-relation queries the response was YES. [2024-06-27 21:13:57,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35391 conditions, 4924 events. 3006/4924 cut-off events. For 404730/404732 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30421 event pairs, 623 based on Foata normal form. 1/4922 useless extension candidates. Maximal degree in co-relation 35243. Up to 4183 conditions per place. [2024-06-27 21:13:57,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 154 changer transitions 0/491 dead transitions. [2024-06-27 21:13:57,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 491 transitions, 7318 flow [2024-06-27 21:13:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:13:57,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:13:57,573 INFO L175 Difference]: Start difference. First operand has 347 places, 451 transitions, 5512 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:13:57,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 491 transitions, 7318 flow [2024-06-27 21:13:58,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 491 transitions, 7074 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:58,825 INFO L231 Difference]: Finished difference. Result has 349 places, 454 transitions, 5636 flow [2024-06-27 21:13:58,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5636, PETRI_PLACES=349, PETRI_TRANSITIONS=454} [2024-06-27 21:13:58,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 21:13:58,826 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 454 transitions, 5636 flow [2024-06-27 21:13:58,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:58,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:58,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:58,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:13:58,827 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 21:13:58,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1805726561, now seen corresponding path program 6 times [2024-06-27 21:13:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:58,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210935516] [2024-06-27 21:13:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:02,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:02,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210935516] [2024-06-27 21:14:02,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210935516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:02,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:02,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:02,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376650004] [2024-06-27 21:14:02,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:02,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:02,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:02,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:02,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:02,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:02,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 454 transitions, 5636 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:02,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:02,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:02,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:04,619 INFO L124 PetriNetUnfolderBase]: 3016/4947 cut-off events. [2024-06-27 21:14:04,619 INFO L125 PetriNetUnfolderBase]: For 413468/413472 co-relation queries the response was YES. [2024-06-27 21:14:04,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35767 conditions, 4947 events. 3016/4947 cut-off events. For 413468/413472 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30718 event pairs, 617 based on Foata normal form. 3/4948 useless extension candidates. Maximal degree in co-relation 35617. Up to 4419 conditions per place. [2024-06-27 21:14:04,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 99 changer transitions 0/489 dead transitions. [2024-06-27 21:14:04,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 489 transitions, 6774 flow [2024-06-27 21:14:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:14:04,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:14:04,679 INFO L175 Difference]: Start difference. First operand has 349 places, 454 transitions, 5636 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:14:04,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 489 transitions, 6774 flow [2024-06-27 21:14:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 489 transitions, 6424 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:05,730 INFO L231 Difference]: Finished difference. Result has 352 places, 460 transitions, 5586 flow [2024-06-27 21:14:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5586, PETRI_PLACES=352, PETRI_TRANSITIONS=460} [2024-06-27 21:14:05,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 21:14:05,731 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 460 transitions, 5586 flow [2024-06-27 21:14:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:05,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:05,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:14:05,731 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 21:14:05,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2037471993, now seen corresponding path program 7 times [2024-06-27 21:14:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470316168] [2024-06-27 21:14:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:09,174 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 21:14:09,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470316168] [2024-06-27 21:14:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470316168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:09,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577231813] [2024-06-27 21:14:09,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:09,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:09,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:09,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 460 transitions, 5586 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:09,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:09,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:09,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:11,478 INFO L124 PetriNetUnfolderBase]: 3021/4951 cut-off events. [2024-06-27 21:14:11,478 INFO L125 PetriNetUnfolderBase]: For 422392/422394 co-relation queries the response was YES. [2024-06-27 21:14:11,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35676 conditions, 4951 events. 3021/4951 cut-off events. For 422392/422394 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30760 event pairs, 623 based on Foata normal form. 1/4949 useless extension candidates. Maximal degree in co-relation 35525. Up to 4199 conditions per place. [2024-06-27 21:14:11,544 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 170 changer transitions 0/494 dead transitions. [2024-06-27 21:14:11,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 494 transitions, 7038 flow [2024-06-27 21:14:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:14:11,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:14:11,546 INFO L175 Difference]: Start difference. First operand has 352 places, 460 transitions, 5586 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:14:11,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 494 transitions, 7038 flow [2024-06-27 21:14:12,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 494 transitions, 6812 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:12,732 INFO L231 Difference]: Finished difference. Result has 355 places, 463 transitions, 5748 flow [2024-06-27 21:14:12,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5748, PETRI_PLACES=355, PETRI_TRANSITIONS=463} [2024-06-27 21:14:12,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 21:14:12,732 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 463 transitions, 5748 flow [2024-06-27 21:14:12,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:12,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:12,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:12,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:14:12,733 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 21:14:12,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2043012747, now seen corresponding path program 4 times [2024-06-27 21:14:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:12,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529654214] [2024-06-27 21:14:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:12,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:16,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529654214] [2024-06-27 21:14:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529654214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:16,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:16,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:16,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527140148] [2024-06-27 21:14:16,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:16,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:16,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:16,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:16,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 463 transitions, 5748 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:16,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:16,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:16,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:18,813 INFO L124 PetriNetUnfolderBase]: 3063/5020 cut-off events. [2024-06-27 21:14:18,813 INFO L125 PetriNetUnfolderBase]: For 453164/453168 co-relation queries the response was YES. [2024-06-27 21:14:18,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36886 conditions, 5020 events. 3063/5020 cut-off events. For 453164/453168 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 31234 event pairs, 599 based on Foata normal form. 4/5022 useless extension candidates. Maximal degree in co-relation 36734. Up to 4238 conditions per place. [2024-06-27 21:14:18,874 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 174 changer transitions 0/511 dead transitions. [2024-06-27 21:14:18,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 511 transitions, 7598 flow [2024-06-27 21:14:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:14:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:14:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-27 21:14:18,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:14:18,876 INFO L175 Difference]: Start difference. First operand has 355 places, 463 transitions, 5748 flow. Second operand 12 states and 201 transitions. [2024-06-27 21:14:18,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 511 transitions, 7598 flow [2024-06-27 21:14:20,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 511 transitions, 7282 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:20,143 INFO L231 Difference]: Finished difference. Result has 361 places, 472 transitions, 6002 flow [2024-06-27 21:14:20,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5432, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6002, PETRI_PLACES=361, PETRI_TRANSITIONS=472} [2024-06-27 21:14:20,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 21:14:20,144 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 472 transitions, 6002 flow [2024-06-27 21:14:20,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:20,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:20,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:20,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:14:20,144 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 21:14:20,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2033746971, now seen corresponding path program 2 times [2024-06-27 21:14:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222499949] [2024-06-27 21:14:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:23,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:23,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222499949] [2024-06-27 21:14:23,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222499949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:23,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:23,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:23,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880173797] [2024-06-27 21:14:23,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:23,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:23,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:23,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:23,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 472 transitions, 6002 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:23,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:23,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:26,049 INFO L124 PetriNetUnfolderBase]: 3089/5053 cut-off events. [2024-06-27 21:14:26,049 INFO L125 PetriNetUnfolderBase]: For 473592/473600 co-relation queries the response was YES. [2024-06-27 21:14:26,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37749 conditions, 5053 events. 3089/5053 cut-off events. For 473592/473600 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31401 event pairs, 604 based on Foata normal form. 10/5061 useless extension candidates. Maximal degree in co-relation 37596. Up to 4579 conditions per place. [2024-06-27 21:14:26,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 91 changer transitions 0/515 dead transitions. [2024-06-27 21:14:26,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 515 transitions, 7356 flow [2024-06-27 21:14:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:14:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:14:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-27 21:14:26,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-27 21:14:26,120 INFO L175 Difference]: Start difference. First operand has 361 places, 472 transitions, 6002 flow. Second operand 13 states and 203 transitions. [2024-06-27 21:14:26,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 515 transitions, 7356 flow [2024-06-27 21:14:27,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 515 transitions, 7105 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:27,499 INFO L231 Difference]: Finished difference. Result has 368 places, 478 transitions, 6001 flow [2024-06-27 21:14:27,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6001, PETRI_PLACES=368, PETRI_TRANSITIONS=478} [2024-06-27 21:14:27,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 21:14:27,499 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 478 transitions, 6001 flow [2024-06-27 21:14:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:27,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:27,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:27,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:14:27,500 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 21:14:27,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1796471945, now seen corresponding path program 5 times [2024-06-27 21:14:27,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:27,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982149067] [2024-06-27 21:14:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:27,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:31,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:31,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982149067] [2024-06-27 21:14:31,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982149067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:31,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:31,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:31,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488918395] [2024-06-27 21:14:31,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:31,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:31,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:31,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:31,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 478 transitions, 6001 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:31,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:31,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:31,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:33,462 INFO L124 PetriNetUnfolderBase]: 3120/5103 cut-off events. [2024-06-27 21:14:33,462 INFO L125 PetriNetUnfolderBase]: For 489553/489557 co-relation queries the response was YES. [2024-06-27 21:14:33,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38261 conditions, 5103 events. 3120/5103 cut-off events. For 489553/489557 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31792 event pairs, 598 based on Foata normal form. 4/5105 useless extension candidates. Maximal degree in co-relation 38106. Up to 4303 conditions per place. [2024-06-27 21:14:33,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 178 changer transitions 0/524 dead transitions. [2024-06-27 21:14:33,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 524 transitions, 7779 flow [2024-06-27 21:14:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:14:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:14:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 211 transitions. [2024-06-27 21:14:33,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38644688644688646 [2024-06-27 21:14:33,524 INFO L175 Difference]: Start difference. First operand has 368 places, 478 transitions, 6001 flow. Second operand 13 states and 211 transitions. [2024-06-27 21:14:33,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 524 transitions, 7779 flow [2024-06-27 21:14:35,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 524 transitions, 7647 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 21:14:35,116 INFO L231 Difference]: Finished difference. Result has 372 places, 487 transitions, 6339 flow [2024-06-27 21:14:35,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6339, PETRI_PLACES=372, PETRI_TRANSITIONS=487} [2024-06-27 21:14:35,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 21:14:35,117 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 487 transitions, 6339 flow [2024-06-27 21:14:35,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:35,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:35,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:35,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:14:35,118 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 21:14:35,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2033758503, now seen corresponding path program 8 times [2024-06-27 21:14:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:35,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241143694] [2024-06-27 21:14:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:38,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241143694] [2024-06-27 21:14:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241143694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:38,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:38,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907076089] [2024-06-27 21:14:38,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:38,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:38,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:38,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:38,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 487 transitions, 6339 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:38,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:38,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:38,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:41,224 INFO L124 PetriNetUnfolderBase]: 3133/5133 cut-off events. [2024-06-27 21:14:41,224 INFO L125 PetriNetUnfolderBase]: For 496864/496868 co-relation queries the response was YES. [2024-06-27 21:14:41,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38678 conditions, 5133 events. 3133/5133 cut-off events. For 496864/496868 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32057 event pairs, 629 based on Foata normal form. 3/5134 useless extension candidates. Maximal degree in co-relation 38521. Up to 4565 conditions per place. [2024-06-27 21:14:41,293 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 113 changer transitions 0/521 dead transitions. [2024-06-27 21:14:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 521 transitions, 7723 flow [2024-06-27 21:14:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 21:14:41,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-27 21:14:41,295 INFO L175 Difference]: Start difference. First operand has 372 places, 487 transitions, 6339 flow. Second operand 11 states and 177 transitions. [2024-06-27 21:14:41,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 521 transitions, 7723 flow [2024-06-27 21:14:42,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 521 transitions, 7431 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:42,962 INFO L231 Difference]: Finished difference. Result has 377 places, 493 transitions, 6391 flow [2024-06-27 21:14:42,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6391, PETRI_PLACES=377, PETRI_TRANSITIONS=493} [2024-06-27 21:14:42,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 21:14:42,963 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 493 transitions, 6391 flow [2024-06-27 21:14:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:42,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:42,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:42,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:14:42,964 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 21:14:42,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1796460785, now seen corresponding path program 6 times [2024-06-27 21:14:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:42,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941060023] [2024-06-27 21:14:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:46,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:46,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941060023] [2024-06-27 21:14:46,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941060023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:46,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:46,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:46,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151765315] [2024-06-27 21:14:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:46,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:46,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:46,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 493 transitions, 6391 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:46,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:48,230 INFO L124 PetriNetUnfolderBase]: 3127/5117 cut-off events. [2024-06-27 21:14:48,230 INFO L125 PetriNetUnfolderBase]: For 502217/502221 co-relation queries the response was YES. [2024-06-27 21:14:48,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 5117 events. 3127/5117 cut-off events. For 502217/502221 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31919 event pairs, 598 based on Foata normal form. 4/5119 useless extension candidates. Maximal degree in co-relation 38227. Up to 4316 conditions per place. [2024-06-27 21:14:48,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 177 changer transitions 0/526 dead transitions. [2024-06-27 21:14:48,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 526 transitions, 7885 flow [2024-06-27 21:14:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:14:48,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-27 21:14:48,304 INFO L175 Difference]: Start difference. First operand has 377 places, 493 transitions, 6391 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:14:48,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 526 transitions, 7885 flow [2024-06-27 21:14:49,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 526 transitions, 7599 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:49,702 INFO L231 Difference]: Finished difference. Result has 380 places, 493 transitions, 6465 flow [2024-06-27 21:14:49,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6465, PETRI_PLACES=380, PETRI_TRANSITIONS=493} [2024-06-27 21:14:49,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 21:14:49,702 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 493 transitions, 6465 flow [2024-06-27 21:14:49,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:49,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:49,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:49,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:14:49,703 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 21:14:49,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1796466551, now seen corresponding path program 9 times [2024-06-27 21:14:49,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:49,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009665266] [2024-06-27 21:14:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009665266] [2024-06-27 21:14:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009665266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:53,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:53,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663736354] [2024-06-27 21:14:53,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:53,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:53,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:53,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 493 transitions, 6465 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:53,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:53,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:53,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:55,169 INFO L124 PetriNetUnfolderBase]: 3124/5113 cut-off events. [2024-06-27 21:14:55,169 INFO L125 PetriNetUnfolderBase]: For 504034/504038 co-relation queries the response was YES. [2024-06-27 21:14:55,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38534 conditions, 5113 events. 3124/5113 cut-off events. For 504034/504038 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31854 event pairs, 624 based on Foata normal form. 3/5114 useless extension candidates. Maximal degree in co-relation 38374. Up to 4554 conditions per place. [2024-06-27 21:14:55,232 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 112 changer transitions 0/518 dead transitions. [2024-06-27 21:14:55,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 518 transitions, 7559 flow [2024-06-27 21:14:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:14:55,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:14:55,233 INFO L175 Difference]: Start difference. First operand has 380 places, 493 transitions, 6465 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:14:55,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 518 transitions, 7559 flow [2024-06-27 21:14:56,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 518 transitions, 7179 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 21:14:56,632 INFO L231 Difference]: Finished difference. Result has 379 places, 493 transitions, 6315 flow [2024-06-27 21:14:56,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6085, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6315, PETRI_PLACES=379, PETRI_TRANSITIONS=493} [2024-06-27 21:14:56,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 21:14:56,632 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 493 transitions, 6315 flow [2024-06-27 21:14:56,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:56,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:56,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:14:56,633 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 21:14:56,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:56,633 INFO L85 PathProgramCache]: Analyzing trace with hash -141744285, now seen corresponding path program 3 times [2024-06-27 21:14:56,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:56,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540670248] [2024-06-27 21:14:56,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:56,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:59,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540670248] [2024-06-27 21:14:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540670248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:59,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:59,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:59,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847598351] [2024-06-27 21:14:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:59,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:00,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:00,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 493 transitions, 6315 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:00,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:00,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:00,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:02,257 INFO L124 PetriNetUnfolderBase]: 3118/5106 cut-off events. [2024-06-27 21:15:02,258 INFO L125 PetriNetUnfolderBase]: For 508789/508797 co-relation queries the response was YES. [2024-06-27 21:15:02,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38149 conditions, 5106 events. 3118/5106 cut-off events. For 508789/508797 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31903 event pairs, 603 based on Foata normal form. 10/5114 useless extension candidates. Maximal degree in co-relation 37988. Up to 4623 conditions per place. [2024-06-27 21:15:02,330 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 432 selfloop transitions, 91 changer transitions 0/528 dead transitions. [2024-06-27 21:15:02,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 528 transitions, 7457 flow [2024-06-27 21:15:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:15:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:15:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:15:02,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-27 21:15:02,331 INFO L175 Difference]: Start difference. First operand has 379 places, 493 transitions, 6315 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:15:02,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 528 transitions, 7457 flow [2024-06-27 21:15:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 528 transitions, 7217 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:03,905 INFO L231 Difference]: Finished difference. Result has 383 places, 493 transitions, 6263 flow [2024-06-27 21:15:03,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6263, PETRI_PLACES=383, PETRI_TRANSITIONS=493} [2024-06-27 21:15:03,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 21:15:03,906 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 493 transitions, 6263 flow [2024-06-27 21:15:03,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:03,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:03,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:03,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:15:03,906 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 21:15:03,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1061602613, now seen corresponding path program 7 times [2024-06-27 21:15:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:03,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884894421] [2024-06-27 21:15:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884894421] [2024-06-27 21:15:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884894421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:07,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:07,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:07,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897984853] [2024-06-27 21:15:07,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:07,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:07,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 493 transitions, 6263 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:07,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:07,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:07,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:09,693 INFO L124 PetriNetUnfolderBase]: 3158/5172 cut-off events. [2024-06-27 21:15:09,693 INFO L125 PetriNetUnfolderBase]: For 518537/518539 co-relation queries the response was YES. [2024-06-27 21:15:09,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38580 conditions, 5172 events. 3158/5172 cut-off events. For 518537/518539 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 32370 event pairs, 596 based on Foata normal form. 2/5172 useless extension candidates. Maximal degree in co-relation 38418. Up to 4686 conditions per place. [2024-06-27 21:15:09,752 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 447 selfloop transitions, 79 changer transitions 0/531 dead transitions. [2024-06-27 21:15:09,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 531 transitions, 7563 flow [2024-06-27 21:15:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:15:09,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:15:09,753 INFO L175 Difference]: Start difference. First operand has 383 places, 493 transitions, 6263 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:15:09,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 531 transitions, 7563 flow [2024-06-27 21:15:10,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 531 transitions, 7381 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:15:10,871 INFO L231 Difference]: Finished difference. Result has 382 places, 505 transitions, 6443 flow [2024-06-27 21:15:10,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6443, PETRI_PLACES=382, PETRI_TRANSITIONS=505} [2024-06-27 21:15:10,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 21:15:10,872 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 505 transitions, 6443 flow [2024-06-27 21:15:10,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:10,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:10,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:10,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:15:10,872 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 21:15:10,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1033525105, now seen corresponding path program 8 times [2024-06-27 21:15:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:10,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523108469] [2024-06-27 21:15:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:10,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:14,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:14,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523108469] [2024-06-27 21:15:14,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523108469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:14,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:14,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14623235] [2024-06-27 21:15:14,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:14,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:14,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:14,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 505 transitions, 6443 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:14,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:14,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:14,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:17,004 INFO L124 PetriNetUnfolderBase]: 3199/5225 cut-off events. [2024-06-27 21:15:17,005 INFO L125 PetriNetUnfolderBase]: For 539077/539079 co-relation queries the response was YES. [2024-06-27 21:15:17,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39338 conditions, 5225 events. 3199/5225 cut-off events. For 539077/539079 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 32622 event pairs, 595 based on Foata normal form. 2/5225 useless extension candidates. Maximal degree in co-relation 39175. Up to 4706 conditions per place. [2024-06-27 21:15:17,085 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 98 changer transitions 0/551 dead transitions. [2024-06-27 21:15:17,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 551 transitions, 8011 flow [2024-06-27 21:15:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:15:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:15:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-27 21:15:17,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-27 21:15:17,086 INFO L175 Difference]: Start difference. First operand has 382 places, 505 transitions, 6443 flow. Second operand 14 states and 214 transitions. [2024-06-27 21:15:17,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 551 transitions, 8011 flow [2024-06-27 21:15:18,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 551 transitions, 7867 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:18,949 INFO L231 Difference]: Finished difference. Result has 391 places, 517 transitions, 6734 flow [2024-06-27 21:15:18,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6299, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6734, PETRI_PLACES=391, PETRI_TRANSITIONS=517} [2024-06-27 21:15:18,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 21:15:18,949 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 517 transitions, 6734 flow [2024-06-27 21:15:18,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:18,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:18,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:15:18,950 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 21:15:18,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash 509987771, now seen corresponding path program 9 times [2024-06-27 21:15:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:18,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033911835] [2024-06-27 21:15:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:22,373 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 21:15:22,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:22,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033911835] [2024-06-27 21:15:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033911835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:22,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:22,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229327381] [2024-06-27 21:15:22,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:22,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:22,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:22,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:22,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 517 transitions, 6734 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:22,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:22,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:22,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:24,167 INFO L124 PetriNetUnfolderBase]: 3251/5309 cut-off events. [2024-06-27 21:15:24,167 INFO L125 PetriNetUnfolderBase]: For 569869/569873 co-relation queries the response was YES. [2024-06-27 21:15:24,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40444 conditions, 5309 events. 3251/5309 cut-off events. For 569869/569873 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33284 event pairs, 616 based on Foata normal form. 4/5311 useless extension candidates. Maximal degree in co-relation 40279. Up to 4423 conditions per place. [2024-06-27 21:15:24,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 204 changer transitions 0/560 dead transitions. [2024-06-27 21:15:24,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 560 transitions, 8506 flow [2024-06-27 21:15:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:15:24,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 21:15:24,413 INFO L175 Difference]: Start difference. First operand has 391 places, 517 transitions, 6734 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:15:24,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 560 transitions, 8506 flow [2024-06-27 21:15:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 560 transitions, 8327 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-27 21:15:26,158 INFO L231 Difference]: Finished difference. Result has 391 places, 532 transitions, 7173 flow [2024-06-27 21:15:26,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6555, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7173, PETRI_PLACES=391, PETRI_TRANSITIONS=532} [2024-06-27 21:15:26,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 21:15:26,158 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 532 transitions, 7173 flow [2024-06-27 21:15:26,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:26,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:26,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:15:26,159 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 21:15:26,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1061722769, now seen corresponding path program 4 times [2024-06-27 21:15:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:26,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840904638] [2024-06-27 21:15:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:29,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840904638] [2024-06-27 21:15:29,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840904638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:29,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:29,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539806753] [2024-06-27 21:15:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:29,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:29,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 532 transitions, 7173 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:29,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:29,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:29,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:31,899 INFO L124 PetriNetUnfolderBase]: 3293/5371 cut-off events. [2024-06-27 21:15:31,899 INFO L125 PetriNetUnfolderBase]: For 600606/600614 co-relation queries the response was YES. [2024-06-27 21:15:31,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41778 conditions, 5371 events. 3293/5371 cut-off events. For 600606/600614 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 33675 event pairs, 615 based on Foata normal form. 10/5379 useless extension candidates. Maximal degree in co-relation 41611. Up to 4826 conditions per place. [2024-06-27 21:15:31,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 102 changer transitions 0/573 dead transitions. [2024-06-27 21:15:31,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 573 transitions, 8697 flow [2024-06-27 21:15:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:15:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:15:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 21:15:31,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 21:15:31,977 INFO L175 Difference]: Start difference. First operand has 391 places, 532 transitions, 7173 flow. Second operand 12 states and 188 transitions. [2024-06-27 21:15:31,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 573 transitions, 8697 flow [2024-06-27 21:15:34,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 573 transitions, 8440 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:34,122 INFO L231 Difference]: Finished difference. Result has 399 places, 541 transitions, 7262 flow [2024-06-27 21:15:34,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7262, PETRI_PLACES=399, PETRI_TRANSITIONS=541} [2024-06-27 21:15:34,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 21:15:34,122 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 541 transitions, 7262 flow [2024-06-27 21:15:34,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:34,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:34,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:34,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:15:34,123 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 21:15:34,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1652725751, now seen corresponding path program 10 times [2024-06-27 21:15:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319104577] [2024-06-27 21:15:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:37,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319104577] [2024-06-27 21:15:37,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319104577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:37,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:37,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:37,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486936853] [2024-06-27 21:15:37,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:37,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:37,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:37,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:37,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 541 transitions, 7262 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:37,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:37,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:37,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:39,625 INFO L124 PetriNetUnfolderBase]: 3298/5392 cut-off events. [2024-06-27 21:15:39,625 INFO L125 PetriNetUnfolderBase]: For 606735/606737 co-relation queries the response was YES. [2024-06-27 21:15:39,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41731 conditions, 5392 events. 3298/5392 cut-off events. For 606735/606737 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33922 event pairs, 639 based on Foata normal form. 1/5391 useless extension candidates. Maximal degree in co-relation 41563. Up to 4959 conditions per place. [2024-06-27 21:15:39,705 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 51 changer transitions 0/565 dead transitions. [2024-06-27 21:15:39,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 565 transitions, 8498 flow [2024-06-27 21:15:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:15:39,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 21:15:39,706 INFO L175 Difference]: Start difference. First operand has 399 places, 541 transitions, 7262 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:15:39,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 565 transitions, 8498 flow [2024-06-27 21:15:41,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 565 transitions, 8350 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:41,792 INFO L231 Difference]: Finished difference. Result has 400 places, 544 transitions, 7289 flow [2024-06-27 21:15:41,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7114, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7289, PETRI_PLACES=400, PETRI_TRANSITIONS=544} [2024-06-27 21:15:41,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 21:15:41,792 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 544 transitions, 7289 flow [2024-06-27 21:15:41,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:41,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:41,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:15:41,793 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 21:15:41,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2151639, now seen corresponding path program 10 times [2024-06-27 21:15:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:41,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769805993] [2024-06-27 21:15:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:41,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769805993] [2024-06-27 21:15:45,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769805993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:45,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:45,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:45,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658575354] [2024-06-27 21:15:45,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:45,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:45,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:45,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 544 transitions, 7289 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:45,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:45,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:45,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:47,620 INFO L124 PetriNetUnfolderBase]: 3308/5394 cut-off events. [2024-06-27 21:15:47,620 INFO L125 PetriNetUnfolderBase]: For 624865/624869 co-relation queries the response was YES. [2024-06-27 21:15:47,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41962 conditions, 5394 events. 3308/5394 cut-off events. For 624865/624869 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 33826 event pairs, 614 based on Foata normal form. 4/5396 useless extension candidates. Maximal degree in co-relation 41792. Up to 4498 conditions per place. [2024-06-27 21:15:47,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 214 changer transitions 0/579 dead transitions. [2024-06-27 21:15:47,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 579 transitions, 9161 flow [2024-06-27 21:15:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:15:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:15:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-27 21:15:47,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-27 21:15:47,691 INFO L175 Difference]: Start difference. First operand has 400 places, 544 transitions, 7289 flow. Second operand 12 states and 197 transitions. [2024-06-27 21:15:47,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 579 transitions, 9161 flow [2024-06-27 21:15:49,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 579 transitions, 9014 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:49,978 INFO L231 Difference]: Finished difference. Result has 405 places, 547 transitions, 7622 flow [2024-06-27 21:15:49,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7142, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7622, PETRI_PLACES=405, PETRI_TRANSITIONS=547} [2024-06-27 21:15:49,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 21:15:49,978 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 547 transitions, 7622 flow [2024-06-27 21:15:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:49,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:49,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:15:49,979 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 21:15:49,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash -600350775, now seen corresponding path program 5 times [2024-06-27 21:15:49,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:49,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067867418] [2024-06-27 21:15:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:49,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:53,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067867418] [2024-06-27 21:15:53,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067867418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:53,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:53,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74339551] [2024-06-27 21:15:53,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:53,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:53,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:53,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:53,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:53,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 547 transitions, 7622 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:53,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:53,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:53,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:56,534 INFO L124 PetriNetUnfolderBase]: 3318/5404 cut-off events. [2024-06-27 21:15:56,534 INFO L125 PetriNetUnfolderBase]: For 637867/637875 co-relation queries the response was YES. [2024-06-27 21:15:56,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42659 conditions, 5404 events. 3318/5404 cut-off events. For 637867/637875 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 33893 event pairs, 616 based on Foata normal form. 10/5412 useless extension candidates. Maximal degree in co-relation 42488. Up to 4857 conditions per place. [2024-06-27 21:15:56,601 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 479 selfloop transitions, 105 changer transitions 0/589 dead transitions. [2024-06-27 21:15:56,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 589 transitions, 9337 flow [2024-06-27 21:15:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 21:15:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 21:15:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 230 transitions. [2024-06-27 21:15:56,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 21:15:56,602 INFO L175 Difference]: Start difference. First operand has 405 places, 547 transitions, 7622 flow. Second operand 15 states and 230 transitions. [2024-06-27 21:15:56,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 589 transitions, 9337 flow [2024-06-27 21:15:58,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 589 transitions, 8897 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:58,679 INFO L231 Difference]: Finished difference. Result has 412 places, 550 transitions, 7441 flow [2024-06-27 21:15:58,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7441, PETRI_PLACES=412, PETRI_TRANSITIONS=550} [2024-06-27 21:15:58,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 21:15:58,680 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 550 transitions, 7441 flow [2024-06-27 21:15:58,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:58,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:58,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:58,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:15:58,680 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 21:15:58,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash -600356727, now seen corresponding path program 11 times [2024-06-27 21:15:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:58,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377537142] [2024-06-27 21:15:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:02,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377537142] [2024-06-27 21:16:02,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377537142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:02,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:02,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549995476] [2024-06-27 21:16:02,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:02,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:02,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:02,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 550 transitions, 7441 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:02,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:02,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:02,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:04,204 INFO L124 PetriNetUnfolderBase]: 3339/5457 cut-off events. [2024-06-27 21:16:04,204 INFO L125 PetriNetUnfolderBase]: For 653363/653367 co-relation queries the response was YES. [2024-06-27 21:16:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42886 conditions, 5457 events. 3339/5457 cut-off events. For 653363/653367 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34467 event pairs, 650 based on Foata normal form. 3/5458 useless extension candidates. Maximal degree in co-relation 42714. Up to 4821 conditions per place. [2024-06-27 21:16:04,283 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 441 selfloop transitions, 137 changer transitions 0/583 dead transitions. [2024-06-27 21:16:04,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 583 transitions, 9244 flow [2024-06-27 21:16:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:16:04,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-27 21:16:04,284 INFO L175 Difference]: Start difference. First operand has 412 places, 550 transitions, 7441 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:16:04,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 583 transitions, 9244 flow [2024-06-27 21:16:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 583 transitions, 8967 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-27 21:16:06,662 INFO L231 Difference]: Finished difference. Result has 412 places, 559 transitions, 7683 flow [2024-06-27 21:16:06,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7164, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7683, PETRI_PLACES=412, PETRI_TRANSITIONS=559} [2024-06-27 21:16:06,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 21:16:06,662 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 559 transitions, 7683 flow [2024-06-27 21:16:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:06,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:06,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:16:06,663 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 21:16:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1652725565, now seen corresponding path program 11 times [2024-06-27 21:16:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48587292] [2024-06-27 21:16:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:10,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:10,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48587292] [2024-06-27 21:16:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48587292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:10,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:10,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471128354] [2024-06-27 21:16:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:10,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:10,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 559 transitions, 7683 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:10,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:10,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:10,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:12,927 INFO L124 PetriNetUnfolderBase]: 3333/5447 cut-off events. [2024-06-27 21:16:12,927 INFO L125 PetriNetUnfolderBase]: For 660493/660495 co-relation queries the response was YES. [2024-06-27 21:16:12,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42629 conditions, 5447 events. 3333/5447 cut-off events. For 660493/660495 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34364 event pairs, 610 based on Foata normal form. 2/5447 useless extension candidates. Maximal degree in co-relation 42455. Up to 4895 conditions per place. [2024-06-27 21:16:13,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 98 changer transitions 0/588 dead transitions. [2024-06-27 21:16:13,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 588 transitions, 8921 flow [2024-06-27 21:16:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-27 21:16:13,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-27 21:16:13,016 INFO L175 Difference]: Start difference. First operand has 412 places, 559 transitions, 7683 flow. Second operand 12 states and 187 transitions. [2024-06-27 21:16:13,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 588 transitions, 8921 flow [2024-06-27 21:16:15,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 588 transitions, 8595 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:15,551 INFO L231 Difference]: Finished difference. Result has 418 places, 559 transitions, 7562 flow [2024-06-27 21:16:15,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7357, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7562, PETRI_PLACES=418, PETRI_TRANSITIONS=559} [2024-06-27 21:16:15,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 21:16:15,552 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 559 transitions, 7562 flow [2024-06-27 21:16:15,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:15,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:15,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:15,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:16:15,553 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 21:16:15,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1054365539, now seen corresponding path program 6 times [2024-06-27 21:16:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:15,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34871530] [2024-06-27 21:16:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:15,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:19,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34871530] [2024-06-27 21:16:19,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34871530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:19,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:19,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:19,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084111119] [2024-06-27 21:16:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:19,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:19,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 559 transitions, 7562 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:19,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:19,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:19,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:21,862 INFO L124 PetriNetUnfolderBase]: 3327/5429 cut-off events. [2024-06-27 21:16:21,862 INFO L125 PetriNetUnfolderBase]: For 661190/661198 co-relation queries the response was YES. [2024-06-27 21:16:21,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42336 conditions, 5429 events. 3327/5429 cut-off events. For 661190/661198 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34177 event pairs, 614 based on Foata normal form. 10/5437 useless extension candidates. Maximal degree in co-relation 42161. Up to 4873 conditions per place. [2024-06-27 21:16:21,931 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 483 selfloop transitions, 105 changer transitions 0/593 dead transitions. [2024-06-27 21:16:21,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 593 transitions, 9036 flow [2024-06-27 21:16:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-27 21:16:21,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-27 21:16:21,932 INFO L175 Difference]: Start difference. First operand has 418 places, 559 transitions, 7562 flow. Second operand 13 states and 203 transitions. [2024-06-27 21:16:21,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 593 transitions, 9036 flow [2024-06-27 21:16:24,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 593 transitions, 8824 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 21:16:24,056 INFO L231 Difference]: Finished difference. Result has 420 places, 559 transitions, 7566 flow [2024-06-27 21:16:24,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7350, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7566, PETRI_PLACES=420, PETRI_TRANSITIONS=559} [2024-06-27 21:16:24,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 21:16:24,057 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 559 transitions, 7566 flow [2024-06-27 21:16:24,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:24,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:24,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:24,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:16:24,058 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 21:16:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -600362307, now seen corresponding path program 12 times [2024-06-27 21:16:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943701462] [2024-06-27 21:16:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:27,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:27,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943701462] [2024-06-27 21:16:27,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943701462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:27,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:27,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85322347] [2024-06-27 21:16:27,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:27,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:27,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 559 transitions, 7566 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:27,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:27,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:27,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:30,335 INFO L124 PetriNetUnfolderBase]: 3324/5433 cut-off events. [2024-06-27 21:16:30,335 INFO L125 PetriNetUnfolderBase]: For 661075/661079 co-relation queries the response was YES. [2024-06-27 21:16:30,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42308 conditions, 5433 events. 3324/5433 cut-off events. For 661075/661079 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34278 event pairs, 646 based on Foata normal form. 3/5434 useless extension candidates. Maximal degree in co-relation 42132. Up to 4802 conditions per place. [2024-06-27 21:16:30,409 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 441 selfloop transitions, 138 changer transitions 0/584 dead transitions. [2024-06-27 21:16:30,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 584 transitions, 8998 flow [2024-06-27 21:16:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 21:16:30,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 21:16:30,411 INFO L175 Difference]: Start difference. First operand has 420 places, 559 transitions, 7566 flow. Second operand 12 states and 186 transitions. [2024-06-27 21:16:30,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 584 transitions, 8998 flow [2024-06-27 21:16:33,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 584 transitions, 8766 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-27 21:16:33,107 INFO L231 Difference]: Finished difference. Result has 421 places, 559 transitions, 7616 flow [2024-06-27 21:16:33,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7334, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7616, PETRI_PLACES=421, PETRI_TRANSITIONS=559} [2024-06-27 21:16:33,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-27 21:16:33,108 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 559 transitions, 7616 flow [2024-06-27 21:16:33,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:33,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:33,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:33,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:16:33,109 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 21:16:33,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2140479, now seen corresponding path program 12 times [2024-06-27 21:16:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:33,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140148327] [2024-06-27 21:16:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:36,389 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 21:16:36,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:36,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140148327] [2024-06-27 21:16:36,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140148327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:36,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:36,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:36,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141769973] [2024-06-27 21:16:36,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:36,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:36,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:36,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:36,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 559 transitions, 7616 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:36,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:36,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:36,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:38,773 INFO L124 PetriNetUnfolderBase]: 3318/5419 cut-off events. [2024-06-27 21:16:38,773 INFO L125 PetriNetUnfolderBase]: For 668037/668041 co-relation queries the response was YES. [2024-06-27 21:16:38,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42171 conditions, 5419 events. 3318/5419 cut-off events. For 668037/668041 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34139 event pairs, 613 based on Foata normal form. 4/5421 useless extension candidates. Maximal degree in co-relation 41994. Up to 4519 conditions per place. [2024-06-27 21:16:38,850 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 216 changer transitions 0/591 dead transitions. [2024-06-27 21:16:38,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 591 transitions, 9290 flow [2024-06-27 21:16:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-27 21:16:38,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791208791208791 [2024-06-27 21:16:38,851 INFO L175 Difference]: Start difference. First operand has 421 places, 559 transitions, 7616 flow. Second operand 13 states and 207 transitions. [2024-06-27 21:16:38,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 591 transitions, 9290 flow [2024-06-27 21:16:41,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 591 transitions, 8982 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 21:16:41,475 INFO L231 Difference]: Finished difference. Result has 424 places, 559 transitions, 7746 flow [2024-06-27 21:16:41,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7746, PETRI_PLACES=424, PETRI_TRANSITIONS=559} [2024-06-27 21:16:41,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 21:16:41,476 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 559 transitions, 7746 flow [2024-06-27 21:16:41,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:41,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:41,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:41,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:16:41,477 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 21:16:41,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1503787847, now seen corresponding path program 4 times [2024-06-27 21:16:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:41,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533581250] [2024-06-27 21:16:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:41,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:44,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:44,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533581250] [2024-06-27 21:16:44,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533581250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:44,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:44,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:44,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183637236] [2024-06-27 21:16:44,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:44,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:44,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 559 transitions, 7746 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:44,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:44,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:44,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:46,721 INFO L124 PetriNetUnfolderBase]: 3300/5408 cut-off events. [2024-06-27 21:16:46,721 INFO L125 PetriNetUnfolderBase]: For 669363/669369 co-relation queries the response was YES. [2024-06-27 21:16:46,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41535 conditions, 5408 events. 3300/5408 cut-off events. For 669363/669369 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34121 event pairs, 473 based on Foata normal form. 14/5420 useless extension candidates. Maximal degree in co-relation 41357. Up to 4529 conditions per place. [2024-06-27 21:16:46,795 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 93 changer transitions 0/605 dead transitions. [2024-06-27 21:16:46,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 605 transitions, 9126 flow [2024-06-27 21:16:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:16:46,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:16:46,796 INFO L175 Difference]: Start difference. First operand has 424 places, 559 transitions, 7746 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:16:46,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 605 transitions, 9126 flow [2024-06-27 21:16:49,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 605 transitions, 8666 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 21:16:49,215 INFO L231 Difference]: Finished difference. Result has 422 places, 559 transitions, 7482 flow [2024-06-27 21:16:49,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7482, PETRI_PLACES=422, PETRI_TRANSITIONS=559} [2024-06-27 21:16:49,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 21:16:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 559 transitions, 7482 flow [2024-06-27 21:16:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:49,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:49,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:16:49,216 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 21:16:49,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash 136599203, now seen corresponding path program 13 times [2024-06-27 21:16:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655876220] [2024-06-27 21:16:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:52,497 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 21:16:52,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655876220] [2024-06-27 21:16:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655876220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:52,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:52,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:52,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576324746] [2024-06-27 21:16:52,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:52,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:52,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 559 transitions, 7482 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:52,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:52,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:52,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:55,049 INFO L124 PetriNetUnfolderBase]: 3313/5424 cut-off events. [2024-06-27 21:16:55,049 INFO L125 PetriNetUnfolderBase]: For 645725/645733 co-relation queries the response was YES. [2024-06-27 21:16:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41678 conditions, 5424 events. 3313/5424 cut-off events. For 645725/645733 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34289 event pairs, 651 based on Foata normal form. 2/5419 useless extension candidates. Maximal degree in co-relation 41499. Up to 4583 conditions per place. [2024-06-27 21:16:55,130 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 213 changer transitions 0/597 dead transitions. [2024-06-27 21:16:55,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 597 transitions, 9336 flow [2024-06-27 21:16:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:16:55,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:16:55,132 INFO L175 Difference]: Start difference. First operand has 422 places, 559 transitions, 7482 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:16:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 597 transitions, 9336 flow [2024-06-27 21:16:57,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 597 transitions, 9181 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:16:57,786 INFO L231 Difference]: Finished difference. Result has 424 places, 565 transitions, 7921 flow [2024-06-27 21:16:57,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7339, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7921, PETRI_PLACES=424, PETRI_TRANSITIONS=565} [2024-06-27 21:16:57,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 21:16:57,787 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 565 transitions, 7921 flow [2024-06-27 21:16:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:57,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:57,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:57,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:16:57,787 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 21:16:57,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1894841825, now seen corresponding path program 14 times [2024-06-27 21:16:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391900845] [2024-06-27 21:16:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:01,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:01,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391900845] [2024-06-27 21:17:01,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391900845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:01,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:01,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:01,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392582433] [2024-06-27 21:17:01,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:01,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:01,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:01,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 565 transitions, 7921 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:01,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:01,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:01,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:03,635 INFO L124 PetriNetUnfolderBase]: 3334/5457 cut-off events. [2024-06-27 21:17:03,635 INFO L125 PetriNetUnfolderBase]: For 637174/637182 co-relation queries the response was YES. [2024-06-27 21:17:03,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42237 conditions, 5457 events. 3334/5457 cut-off events. For 637174/637182 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34529 event pairs, 651 based on Foata normal form. 2/5452 useless extension candidates. Maximal degree in co-relation 42058. Up to 4607 conditions per place. [2024-06-27 21:17:03,718 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 204 changer transitions 0/608 dead transitions. [2024-06-27 21:17:03,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 608 transitions, 10295 flow [2024-06-27 21:17:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:17:03,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:17:03,719 INFO L175 Difference]: Start difference. First operand has 424 places, 565 transitions, 7921 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:17:03,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 608 transitions, 10295 flow [2024-06-27 21:17:05,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 608 transitions, 9867 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:05,835 INFO L231 Difference]: Finished difference. Result has 428 places, 574 transitions, 8135 flow [2024-06-27 21:17:05,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7526, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8135, PETRI_PLACES=428, PETRI_TRANSITIONS=574} [2024-06-27 21:17:05,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 21:17:05,835 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 574 transitions, 8135 flow [2024-06-27 21:17:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:17:05,836 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 21:17:05,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1900204205, now seen corresponding path program 15 times [2024-06-27 21:17:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346511349] [2024-06-27 21:17:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:09,187 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 21:17:09,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:09,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346511349] [2024-06-27 21:17:09,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346511349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:09,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:09,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:09,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258057596] [2024-06-27 21:17:09,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:09,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:09,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:09,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:09,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 574 transitions, 8135 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:09,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:09,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:09,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:11,651 INFO L124 PetriNetUnfolderBase]: 3339/5450 cut-off events. [2024-06-27 21:17:11,651 INFO L125 PetriNetUnfolderBase]: For 648900/648908 co-relation queries the response was YES. [2024-06-27 21:17:11,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42303 conditions, 5450 events. 3339/5450 cut-off events. For 648900/648908 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34374 event pairs, 643 based on Foata normal form. 2/5445 useless extension candidates. Maximal degree in co-relation 42123. Up to 4613 conditions per place. [2024-06-27 21:17:11,735 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 212 changer transitions 0/610 dead transitions. [2024-06-27 21:17:11,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 610 transitions, 10149 flow [2024-06-27 21:17:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:17:11,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:17:11,737 INFO L175 Difference]: Start difference. First operand has 428 places, 574 transitions, 8135 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:17:11,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 610 transitions, 10149 flow [2024-06-27 21:17:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 610 transitions, 9316 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:14,429 INFO L231 Difference]: Finished difference. Result has 428 places, 577 transitions, 7804 flow [2024-06-27 21:17:14,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7320, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7804, PETRI_PLACES=428, PETRI_TRANSITIONS=577} [2024-06-27 21:17:14,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 21:17:14,429 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 577 transitions, 7804 flow [2024-06-27 21:17:14,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:14,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:14,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:17:14,429 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 21:17:14,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash -129385467, now seen corresponding path program 13 times [2024-06-27 21:17:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666163861] [2024-06-27 21:17:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666163861] [2024-06-27 21:17:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666163861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:17,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788684576] [2024-06-27 21:17:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:17,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:17,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:17,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:17,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 577 transitions, 7804 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:17,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:17,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:17,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:19,986 INFO L124 PetriNetUnfolderBase]: 3354/5491 cut-off events. [2024-06-27 21:17:19,986 INFO L125 PetriNetUnfolderBase]: For 661087/661095 co-relation queries the response was YES. [2024-06-27 21:17:20,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42225 conditions, 5491 events. 3354/5491 cut-off events. For 661087/661095 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34827 event pairs, 645 based on Foata normal form. 3/5487 useless extension candidates. Maximal degree in co-relation 42045. Up to 4833 conditions per place. [2024-06-27 21:17:20,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 129 changer transitions 0/615 dead transitions. [2024-06-27 21:17:20,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 615 transitions, 9419 flow [2024-06-27 21:17:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:17:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:17:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:17:20,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-27 21:17:20,073 INFO L175 Difference]: Start difference. First operand has 428 places, 577 transitions, 7804 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:17:20,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 615 transitions, 9419 flow [2024-06-27 21:17:22,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 615 transitions, 8921 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:22,239 INFO L231 Difference]: Finished difference. Result has 432 places, 583 transitions, 7665 flow [2024-06-27 21:17:22,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7665, PETRI_PLACES=432, PETRI_TRANSITIONS=583} [2024-06-27 21:17:22,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 21:17:22,239 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 583 transitions, 7665 flow [2024-06-27 21:17:22,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:22,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:22,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:22,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:17:22,240 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 21:17:22,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1900084235, now seen corresponding path program 16 times [2024-06-27 21:17:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:22,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505450913] [2024-06-27 21:17:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:22,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:25,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505450913] [2024-06-27 21:17:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505450913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:25,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886576645] [2024-06-27 21:17:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:25,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:25,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:25,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 583 transitions, 7665 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:25,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:25,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:25,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:27,929 INFO L124 PetriNetUnfolderBase]: 3359/5498 cut-off events. [2024-06-27 21:17:27,929 INFO L125 PetriNetUnfolderBase]: For 665561/665569 co-relation queries the response was YES. [2024-06-27 21:17:27,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42111 conditions, 5498 events. 3359/5498 cut-off events. For 665561/665569 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 34843 event pairs, 651 based on Foata normal form. 2/5493 useless extension candidates. Maximal degree in co-relation 41930. Up to 4891 conditions per place. [2024-06-27 21:17:28,010 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 493 selfloop transitions, 114 changer transitions 0/612 dead transitions. [2024-06-27 21:17:28,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 612 transitions, 8998 flow [2024-06-27 21:17:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:17:28,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 21:17:28,012 INFO L175 Difference]: Start difference. First operand has 432 places, 583 transitions, 7665 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:17:28,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 612 transitions, 8998 flow [2024-06-27 21:17:30,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 612 transitions, 8588 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:30,857 INFO L231 Difference]: Finished difference. Result has 432 places, 586 transitions, 7542 flow [2024-06-27 21:17:30,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7542, PETRI_PLACES=432, PETRI_TRANSITIONS=586} [2024-06-27 21:17:30,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 21:17:30,857 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 586 transitions, 7542 flow [2024-06-27 21:17:30,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:30,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:30,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:30,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:17:30,858 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 21:17:30,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash 875425431, now seen corresponding path program 7 times [2024-06-27 21:17:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:30,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845347025] [2024-06-27 21:17:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:34,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:34,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845347025] [2024-06-27 21:17:34,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845347025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:34,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:34,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:34,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992232718] [2024-06-27 21:17:34,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:34,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:34,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:34,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:34,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 586 transitions, 7542 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:34,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:34,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:34,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:36,472 INFO L124 PetriNetUnfolderBase]: 3385/5528 cut-off events. [2024-06-27 21:17:36,473 INFO L125 PetriNetUnfolderBase]: For 694027/694046 co-relation queries the response was YES. [2024-06-27 21:17:36,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42434 conditions, 5528 events. 3385/5528 cut-off events. For 694027/694046 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 34954 event pairs, 628 based on Foata normal form. 16/5540 useless extension candidates. Maximal degree in co-relation 42252. Up to 4977 conditions per place. [2024-06-27 21:17:36,559 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 105 changer transitions 0/624 dead transitions. [2024-06-27 21:17:36,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 624 transitions, 9180 flow [2024-06-27 21:17:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:17:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:17:36,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:17:36,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:17:36,561 INFO L175 Difference]: Start difference. First operand has 432 places, 586 transitions, 7542 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:17:36,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 624 transitions, 9180 flow [2024-06-27 21:17:39,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 624 transitions, 8930 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:39,209 INFO L231 Difference]: Finished difference. Result has 435 places, 592 transitions, 7602 flow [2024-06-27 21:17:39,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7292, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7602, PETRI_PLACES=435, PETRI_TRANSITIONS=592} [2024-06-27 21:17:39,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-27 21:17:39,210 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 592 transitions, 7602 flow [2024-06-27 21:17:39,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:39,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:39,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:17:39,210 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 21:17:39,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 875425059, now seen corresponding path program 17 times [2024-06-27 21:17:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17819745] [2024-06-27 21:17:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:42,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:42,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17819745] [2024-06-27 21:17:42,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17819745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:42,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:42,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:42,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243040426] [2024-06-27 21:17:42,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:42,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:42,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 592 transitions, 7602 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:42,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:42,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:42,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:44,842 INFO L124 PetriNetUnfolderBase]: 3390/5527 cut-off events. [2024-06-27 21:17:44,843 INFO L125 PetriNetUnfolderBase]: For 699346/699354 co-relation queries the response was YES. [2024-06-27 21:17:44,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42555 conditions, 5527 events. 3390/5527 cut-off events. For 699346/699354 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 34880 event pairs, 644 based on Foata normal form. 2/5522 useless extension candidates. Maximal degree in co-relation 42372. Up to 4679 conditions per place. [2024-06-27 21:17:44,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 231 changer transitions 0/623 dead transitions. [2024-06-27 21:17:44,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 623 transitions, 9400 flow [2024-06-27 21:17:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:17:44,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:17:44,927 INFO L175 Difference]: Start difference. First operand has 435 places, 592 transitions, 7602 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:17:44,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 623 transitions, 9400 flow [2024-06-27 21:17:47,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 623 transitions, 9229 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:47,458 INFO L231 Difference]: Finished difference. Result has 438 places, 595 transitions, 7941 flow [2024-06-27 21:17:47,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7431, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7941, PETRI_PLACES=438, PETRI_TRANSITIONS=595} [2024-06-27 21:17:47,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 21:17:47,458 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 595 transitions, 7941 flow [2024-06-27 21:17:47,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:47,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:47,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:47,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:17:47,459 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 21:17:47,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 905087583, now seen corresponding path program 8 times [2024-06-27 21:17:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:47,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781518780] [2024-06-27 21:17:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:50,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:50,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781518780] [2024-06-27 21:17:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781518780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:50,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:50,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759242199] [2024-06-27 21:17:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:50,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:50,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:50,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:50,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 595 transitions, 7941 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:50,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:50,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:50,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:53,087 INFO L124 PetriNetUnfolderBase]: 3400/5557 cut-off events. [2024-06-27 21:17:53,087 INFO L125 PetriNetUnfolderBase]: For 718406/718425 co-relation queries the response was YES. [2024-06-27 21:17:53,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43267 conditions, 5557 events. 3400/5557 cut-off events. For 718406/718425 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 35184 event pairs, 629 based on Foata normal form. 16/5569 useless extension candidates. Maximal degree in co-relation 43082. Up to 4942 conditions per place. [2024-06-27 21:17:53,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 119 changer transitions 0/633 dead transitions. [2024-06-27 21:17:53,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 633 transitions, 9793 flow [2024-06-27 21:17:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:17:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:17:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:17:53,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-27 21:17:53,176 INFO L175 Difference]: Start difference. First operand has 438 places, 595 transitions, 7941 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:17:53,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 633 transitions, 9793 flow [2024-06-27 21:17:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 633 transitions, 9323 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:55,884 INFO L231 Difference]: Finished difference. Result has 443 places, 598 transitions, 7765 flow [2024-06-27 21:17:55,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7765, PETRI_PLACES=443, PETRI_TRANSITIONS=598} [2024-06-27 21:17:55,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-27 21:17:55,885 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 598 transitions, 7765 flow [2024-06-27 21:17:55,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:55,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:55,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:55,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:17:55,886 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 21:17:55,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:55,886 INFO L85 PathProgramCache]: Analyzing trace with hash 905087211, now seen corresponding path program 18 times [2024-06-27 21:17:55,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:55,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104308982] [2024-06-27 21:17:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:55,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104308982] [2024-06-27 21:17:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104308982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:59,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97165618] [2024-06-27 21:17:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:59,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:59,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:59,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 598 transitions, 7765 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:59,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:59,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:59,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:01,608 INFO L124 PetriNetUnfolderBase]: 3405/5558 cut-off events. [2024-06-27 21:18:01,609 INFO L125 PetriNetUnfolderBase]: For 723251/723259 co-relation queries the response was YES. [2024-06-27 21:18:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43129 conditions, 5558 events. 3405/5558 cut-off events. For 723251/723259 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35199 event pairs, 648 based on Foata normal form. 2/5553 useless extension candidates. Maximal degree in co-relation 42943. Up to 4699 conditions per place. [2024-06-27 21:18:01,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 217 changer transitions 0/630 dead transitions. [2024-06-27 21:18:01,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 630 transitions, 9819 flow [2024-06-27 21:18:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:18:01,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:18:01,698 INFO L175 Difference]: Start difference. First operand has 443 places, 598 transitions, 7765 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:18:01,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 630 transitions, 9819 flow [2024-06-27 21:18:04,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 630 transitions, 9422 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-27 21:18:04,675 INFO L231 Difference]: Finished difference. Result has 442 places, 601 transitions, 7856 flow [2024-06-27 21:18:04,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7856, PETRI_PLACES=442, PETRI_TRANSITIONS=601} [2024-06-27 21:18:04,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-27 21:18:04,676 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 601 transitions, 7856 flow [2024-06-27 21:18:04,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:04,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:04,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:04,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:18:04,677 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 21:18:04,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1890824225, now seen corresponding path program 19 times [2024-06-27 21:18:04,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:04,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901263020] [2024-06-27 21:18:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:04,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:08,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901263020] [2024-06-27 21:18:08,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901263020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:08,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:08,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599893429] [2024-06-27 21:18:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:08,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 601 transitions, 7856 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:10,327 INFO L124 PetriNetUnfolderBase]: 3402/5546 cut-off events. [2024-06-27 21:18:10,327 INFO L125 PetriNetUnfolderBase]: For 729644/729652 co-relation queries the response was YES. [2024-06-27 21:18:10,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43013 conditions, 5546 events. 3402/5546 cut-off events. For 729644/729652 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34929 event pairs, 644 based on Foata normal form. 2/5541 useless extension candidates. Maximal degree in co-relation 42827. Up to 4941 conditions per place. [2024-06-27 21:18:10,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 499 selfloop transitions, 120 changer transitions 0/624 dead transitions. [2024-06-27 21:18:10,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 624 transitions, 9384 flow [2024-06-27 21:18:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:18:10,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:18:10,612 INFO L175 Difference]: Start difference. First operand has 442 places, 601 transitions, 7856 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:18:10,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 624 transitions, 9384 flow [2024-06-27 21:18:13,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 624 transitions, 8852 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:13,862 INFO L231 Difference]: Finished difference. Result has 444 places, 601 transitions, 7570 flow [2024-06-27 21:18:13,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7324, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7570, PETRI_PLACES=444, PETRI_TRANSITIONS=601} [2024-06-27 21:18:13,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 21:18:13,863 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 601 transitions, 7570 flow [2024-06-27 21:18:13,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:13,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:13,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:13,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:18:13,864 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 21:18:13,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1364844897, now seen corresponding path program 20 times [2024-06-27 21:18:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570477254] [2024-06-27 21:18:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:17,234 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 21:18:17,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:17,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570477254] [2024-06-27 21:18:17,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570477254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:17,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:17,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659326164] [2024-06-27 21:18:17,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:17,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:17,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:17,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 601 transitions, 7570 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:17,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:17,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:17,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:19,732 INFO L124 PetriNetUnfolderBase]: 3399/5562 cut-off events. [2024-06-27 21:18:19,732 INFO L125 PetriNetUnfolderBase]: For 731292/731300 co-relation queries the response was YES. [2024-06-27 21:18:19,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42080 conditions, 5562 events. 3399/5562 cut-off events. For 731292/731300 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35370 event pairs, 652 based on Foata normal form. 2/5557 useless extension candidates. Maximal degree in co-relation 41894. Up to 4938 conditions per place. [2024-06-27 21:18:19,805 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 499 selfloop transitions, 121 changer transitions 0/625 dead transitions. [2024-06-27 21:18:19,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 625 transitions, 8874 flow [2024-06-27 21:18:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:18:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:18:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 21:18:19,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-27 21:18:19,806 INFO L175 Difference]: Start difference. First operand has 444 places, 601 transitions, 7570 flow. Second operand 11 states and 173 transitions. [2024-06-27 21:18:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 625 transitions, 8874 flow Killed by 15